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#396 Raspberry Pi in the shop
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TOPICS:
- Oscilliscope readings on Heidenhain
- Tool life in A2 steel
- Raspberry Pi in the shop
- Tour of Henry Holsters
- Project management in 2025
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Transcript
Introduction and Podcast Format
00:00:01
John S
Good morning. Welcome to the business of machining episode 396. My name is John Saunders.
00:00:07
johngrimsmo
And my name is John Grimsmo.
00:00:08
John S
And John and I usually record everything we talk about in the spirit of treating this like ah the public publication of a private conversation.
Five-Axis Machine Integration
00:00:16
John S
However, we did just have a probably 15 minute conversation because um I had this idea that I'm just kind of chewing on about what makes sense, kind of long-term big picture and then bring it back to the present to figure out, you know, the future will be kind to me before I intend to invent it.
00:00:34
John S
And um the what I'm trying to figure out is how to integrate a five axis with high tool changer and and high automation capabilities.
00:00:34
johngrimsmo
Mm hmm.
00:00:46
John S
So like many pallets more than just what you see, unfortunately on something like a, that's your PC 10 system.
00:00:53
johngrimsmo
more than 10 or 15 pallets or something.
00:00:55
John S
Yeah.
00:00:55
johngrimsmo
Yep.
00:00:56
John S
um And I've always loved Herma. I know it's kind of a half running joke or truth. They have they are a player and I just don't know. I need i i need to go smart get smart on it. You pointed out Aroa.
00:01:07
John S
um I need to go read about Aroa. And so it's it's half sharing my thought process, but then also an open question, like, who else is doing this well?
00:01:18
John S
Actually, I should probably, it's funny, I should probably consider Kitamura, although I met another person the other day who just really doesn't like the control, which makes it a big turnoff, and it's a new control, but I should still look at that.
00:01:26
johngrimsmo
Yeah. Yeah, yeah.
00:01:30
John S
um Yeah.
00:01:31
johngrimsmo
Get anything with Hydenine, because I am just absolutely in love with Hydenine, and that is one of my talking points for later in this conversation.
00:01:38
John S
Okay, well, good, segue it over to that.
Challenges in Titanium Machining
00:01:40
johngrimsmo
Okay. Uh, so making RFL handle, which is a single piece of titanium handle, but there's a big channel cut out vertically out of it if the handle is sticking up.
00:01:47
John S
Yeah. Yeah.
00:01:50
johngrimsmo
So it's got these two thin titanium sidewalls that are like an inch tall, total tuning forks, right?
00:01:56
John S
Yeah.
00:01:57
johngrimsmo
And I'm slotting it out with a high-feed end mill. Um, I have a lot of reasons why I don't want to use a big slitting saw.
00:02:02
John S
Just going to say, look when can we joke about why we're good?
00:02:03
johngrimsmo
Yeah.
00:02:06
johngrimsmo
Um, so I'm using a high-feed end mill and, and then I'm surfacing the inside of each wall. Um, but I was getting a lot of chatter and vibration on both the high-feed and on the surfacing tool.
00:02:15
John S
OK.
00:02:17
johngrimsmo
And I'm like, I know there's a way to do this. Maybe it's a tooling, maybe it's, and and the tool, the little ball mill that I'm using to surface, it's, it's chipping and wearing out after like a part or two, which is not a good process.
00:02:29
John S
ideal sure.
00:02:31
johngrimsmo
Right. I'm like, how do I make 10 in a night? I can't just have 10 redundant tools.
00:02:34
John S
yeah
00:02:36
johngrimsmo
That's stupid. So I remembered a trick that Marv showed us. um I think when we were there. And then he's told me a couple of things um about it later, is to use the built-in oscilloscope.
00:02:47
John S
yes
00:02:48
johngrimsmo
I don't know if every hydrant has this, but I think they do. Anyway, the current certainly does.
Reducing Vibration in Machining
00:02:53
johngrimsmo
And it basically measures the vibration in the spindle, the XYZ axis, and the B and C axis.
00:03:00
johngrimsmo
And you can choose what you want to measure and how you want to measure it. And it takes a while to like really understand it and know what it's doing. But it is super cool. And one thing Marv said, he's like, You know how you balance your tool holders?
00:03:13
johngrimsmo
Like ideally, it's balanced up to 20,000 RPM or whatever.
00:03:15
John S
Mm hmm.
00:03:16
johngrimsmo
We buy the Regofix ones, which are just balanced up to 42. You don't think about it. But once you put a tool in there, and once you spin it at a certain RPM, and then the machine itself has its own vibrational frequencies,
00:03:28
John S
Yes.
00:03:29
johngrimsmo
So if you program the tool to be at say 18,000 RPM, maybe 18 and a half has less vibration, maybe 17 and a half has less vibration. So this lets you literally play with the feats and speeds knobs or just the RPM knob, turn the spindle on and watch the oscilloscope.
00:03:46
johngrimsmo
as you're at a certain rpm and and i've never really done it well but the other day i took some time and i did that and it was shocking the amount like the sweet spot i went from 9200 rpm to 8500 rpm and i cut the vibration by a third like to a third you don't have to be you can just turn on the spindle but you can also do that
00:04:03
John S
Awesome. Do you have to be in the cut? Okay. So you're, you're not looking at the cutting force by your, okay.
00:04:12
johngrimsmo
So it's it's hard because most cuts are interrupted. It's like meh, meh, meh, depending on what you're cutting, right?
00:04:15
John S
Yeah.
00:04:18
johngrimsmo
um One thing I learned the hard way is I had the machine up at the home position, which is like up and in the corner. And I was doing my vibration test there and I'm like, oh yeah, 92 or 100 to 8,500 is huge difference.
00:04:31
johngrimsmo
And then I moved it down into the cut and it's totally different frequency of vibration.
00:04:33
John S
Yeah. who
00:04:38
johngrimsmo
And I was like, I guess it makes sense, but I didn't think about it. I just wasted the past 45 minutes like fine tuning it up in the corner. I'm not cutting up in the corner. So basically I ran the program down. So it's in the clearance plane just above the cut.
00:04:51
John S
yeah
00:04:51
johngrimsmo
And then I stopped the program and then turned the spindle on and did, did the tuning again there. And I found my result there and, uh, first result after actually cutting a full handle is like massive reduction in vibration just went from a chattery surface to a cut you know you see your cusp height you see your feed forward lines like that's fine
00:05:05
John S
Interesting.
Resonant Frequencies and Machining Improvements
00:05:15
johngrimsmo
but the vibration is gone and i'm like holy league crap this is great a
00:05:15
John S
Yeah.
00:05:21
John S
Can you hear it? Any difference of the actual cutting?
00:05:24
johngrimsmo
little bit so then the other thing i did was i was
00:05:24
John S
Okay.
00:05:27
johngrimsmo
sitting there I was actually doing the cut and I was playing with the both the speeds and the feeds taking notes um you know feed at 80% and you watch the oscilloscope you watch the vibration as it's doing every cut and these are like four inch long cuts so they take many seconds to traverse the part so I have enough time to like gain a steady oscilloscope reading and it was
00:05:42
John S
Yeah.
00:05:50
johngrimsmo
a little harder to see, because the cuts lead to vibration, lead to whatever, but you can see this squiggle line, and you're like, this setting leads to less squiggle lines.
00:06:00
johngrimsmo
And I don't know.
00:06:00
John S
Yeah. If I can dig up my little bit of knowledge, it wouldn't have been like the amplitude of the signal, right?
00:06:05
johngrimsmo
Yeah, yeah.
00:06:07
John S
You're minimizing that, which is like unbelievably cool.
00:06:08
johngrimsmo
And it's it's so cool. And it's neat to see which axis, X, Y, or Z, is getting affected the most.
00:06:17
John S
Well, so you're only are you're only adjusting the RPM or are you trying to, are you like, quote unquote, tuning the servos as well on the respective?
00:06:17
johngrimsmo
and i
00:06:22
johngrimsmo
I'm not tuning anything, I'm just messing it with the RPM and the feed rate, just with it with the knobs, because all I want to know is how I can program this toolpath to be ideal for this particular, you know, the tool sticking out like two two inches from the holder.
00:06:24
John S
Okay. Got it. Yeah.
00:06:31
John S
Mm-hmm.
00:06:39
johngrimsmo
It's a pretty skinny long tool. um
00:06:43
John S
I was gonna say, i you didn't ask for advice, but I'm wondering, is it worth talking to, I think that's Helical or RV, about getting a shortened customs. I know it's high feed, and so they are better with axial stability, but still shorten it up.
00:06:58
John S
If you only need to go an inch, you need all that distance?
00:06:59
johngrimsmo
I need to reach. Yeah, I need all that distance. Not two inches.
00:07:04
John S
What?
00:07:04
johngrimsmo
It's an 1.25 length of cut is what it is.
00:07:07
John S
Okay, okay.
00:07:08
johngrimsmo
And I need it all.
00:07:09
John S
just disregard Okay, that makes, well, that's great then.
00:07:10
johngrimsmo
So the high feed is just clearing out the slot and that's easy, fine. I'm getting great tool life from that, like great tool life.
00:07:15
John S
Yeah.
00:07:18
johngrimsmo
It's the surfacing. I'm tilting it one and a half degrees so I can surface the inside wall on one side and then one and a half degrees in the other way and then it tilts.
00:07:26
John S
You're servicing with a high feed.
00:07:28
johngrimsmo
No, uh, with a ball mill.
00:07:29
John S
Oh, I'm sorry.
00:07:30
johngrimsmo
Yep.
00:07:30
John S
You lost me. So, which I'm thinking high feed the whole time here.
00:07:32
johngrimsmo
No.
00:07:33
John S
The ball mill is shipping, not the high feed.
00:07:34
johngrimsmo
Yeah, exactly.
00:07:35
John S
Got it. Oh, interesting.
00:07:37
johngrimsmo
Yeah.
00:07:37
John S
You would think, cause then you, you aren't likely to be recutting because you have ample flushing action.
00:07:42
johngrimsmo
Mm-hmm.
00:07:44
John S
Huh?
00:07:44
johngrimsmo
And I'm only taking a few of that off the wall. Um, five or 10, I think. And then I tried two different tools, a rough tool, a finished tool. It blows them both out. It just wears them down, but I thought.
00:07:55
John S
interesting yeah is it too little depth of cut are you leaving not enough for the tool to actually
00:07:57
johngrimsmo
Right now, as after making one more handle, it's giving me a great finish with the dead tools. Whereas before it just kept chattering. So I think I'm on the way. It's it's pretty cool.
Machining A2 Steel
00:08:13
johngrimsmo
Maybe. But with the design, there's only so much. Yeah. Hmm.
00:08:13
John S
bite the material out yeah no i hear you but like i owe you a thank you i think grant was emailing you yesterday about
00:08:23
John S
We are now just cutting 17-4, and we bought a couple of test pieces from McMaster, ran fine, and then we just ordered like a pallet from, I think, Penn Stainless, which is a reputable company, and it's cutting different.
00:08:31
johngrimsmo
Oh, yeah.
00:08:35
John S
And it's the same temper, um and we even checked the hardness on it. and the threading was not looking great. It had a little bit of um tearing it looked like.
00:08:46
John S
And so, yeah.
00:08:47
johngrimsmo
Yeah, smearing, like...
00:08:49
John S
And I think it was, I think the answer was to go faster on RPM and not a spring pass.
00:08:54
johngrimsmo
Mmm.
00:08:55
John S
I don't know which of those had a bigger factor in it, but now the threads look, I mean, did you just look at them and you're like, yep, we yep, yep, next please.
00:09:00
johngrimsmo
Mint. yeah Yeah, exactly. I did that. yeah you know yeah And sometimes machining is that.
00:09:05
John S
Like now they look great.
00:09:08
johngrimsmo
It's just fine tuning. And the same recipe might not apply next time, but you you as the machinists get to learn these tips and tricks and and things you're capable of tweaking to be able to get the results you want.
00:09:11
John S
Yeah.
00:09:17
John S
Yeah.
00:09:19
johngrimsmo
And little things like that that drive me crazy. But when I get them, I'm like, oh, baby, let's go.
00:09:29
John S
Did you see, I was trying to think if it was who it was. I think it was Smarter Every Day um or a Mark Rober, one of those types of guys that did the thing where they talked about resonant frequencies um and how, I wish I could remember the exact term, but when you, it would be the same thing as when you and your friend jump on the trampoline at the exact same time and you end up getting the like double jump lift.
00:09:51
johngrimsmo
Okay. Mm hmm.
00:09:54
John S
not the scientific way of explaining it, but um same thing like CJ was talking about with the global testing of like effective ranges and the the blue, the folks that are now part of like MSC than Tennessee that are doing the crazy spindle testing stuff.
00:09:55
johngrimsmo
Yeah.
00:10:06
John S
I can't remember their names and they have sensors in the ends of it. You end up pushing the tool way harder. You have these two bands or two regions, I think there's two that tools actually perform way better in.
00:10:18
johngrimsmo
Yep. The local university here at McMaster has a whole machining research lab dedicated to this. They've got vibration sensors. They do test cut testing for Honda and all the big companies.
00:10:29
johngrimsmo
And you can basically hire them to solve a problem for you and their university students will solve it.
00:10:36
John S
Interesting.
00:10:36
johngrimsmo
Yeah.
00:10:37
John S
Interesting.
00:10:37
johngrimsmo
They will throw every technology at it, which is cool.
00:10:40
John S
what what ah Who makes the ball mill diameter manufacturer spec?
00:10:46
johngrimsmo
The, so the high feet end mill, the long one is helical. The ball mill is debore made locally.
00:10:50
John S
Okay.
00:10:52
John S
Yeah.
00:10:52
johngrimsmo
So it's like a, um, three 32nd ball with a taper neck. That's like pretty, pretty long reach inch, inch, long reach, inch and a half, something like that.
00:10:57
John S
Yes. Okay. Yeah.
00:11:02
johngrimsmo
Um, I like the taper neck because it is a straight taper, no flutes on the sides of the taper.
00:11:03
John S
But it's a straight taper. Okay.
00:11:08
johngrimsmo
Um, so it's just got a tiny little engraving ball, uh, three 32nd ball 93 thou.
00:11:09
John S
Oh.
00:11:15
johngrimsmo
on the end because all I need is, I can't, I don't know, I haven't tried to like do the whole tapered sidewall cutting, you know, with a straight
00:11:23
John S
Mm hmm.
00:11:29
John S
Are you in the inside surface, you're surfacing it, but it is otherwise effectively straight and smooth.
00:11:33
johngrimsmo
line. Yeah. Yeah.
00:11:37
John S
Are you willing to try a barrel cutter?
00:11:40
johngrimsmo
Um, The barrel cutters work when you have more room to work with.
00:11:45
John S
Okay.
00:11:45
johngrimsmo
And I i looked and there's not a barrel cutter that's basically eighth inch diameter and really, really long.
00:11:50
John S
Yeah. Okay. Got it. That's fair.
00:11:53
johngrimsmo
Yeah. And even the tapered fluted end mills, that's like a full taper that I could, you know, squeeze in there and there's none of room.
00:11:58
John S
Yes.
00:12:02
John S
Okay.
00:12:02
johngrimsmo
Um, so I'm kind of limited by design, but I think I got it figured out. I think it just, it just works now.
00:12:09
John S
Well, sorry. Okay. That's also great.
00:12:11
johngrimsmo
Yeah, so like, sweet.
00:12:12
John S
and Man, 80, 500 RPM on ah a 30,000 mill is not a ton of service footage.
00:12:13
johngrimsmo
And that's the thing, when you're designing a part, you're like, I'm going to try it that way. And then you just kind of keep throwing your time at it until it does what you want.
00:12:25
johngrimsmo
I don't remember what it ended up bad. I think I had the rougher at 10,000 and then the finisher at 16,000, but that just led to way too much vibration. So, and titanium is relatively low surface footage anyway.
00:12:41
johngrimsmo
So yeah, that's good. And then the other thing is when we make the pivot hole of this handle, you know, it's drilled through, it's interpolated to size. And then I have a custom key seat cutter that goes into the hole and cuts around and creates the bearing pocket hidden on the inside of the knife.
00:12:55
John S
Yes.
00:13:00
johngrimsmo
So that puts a burr on the outside. And then I stick the handle upright and I have a long lollipop from Harvey come in and I wrote a custom
00:13:04
John S
me
00:13:08
johngrimsmo
sketch to like follow this sketch trace the sketch so it goes down loops around in a full circle forward to back and then out and then back up um and then mirrors it to do the exact same on the other side except even that was leaving a burr on the inside of the handle
00:13:17
John S
yes Yes.
00:13:24
johngrimsmo
And up till now, we've had to put a deburring flappy disc through the pivot hole, flap it around.
00:13:29
John S
Yeah.
00:13:32
johngrimsmo
And I was like, how do I just get it perfect off the machine? Because we have the technology. Everything I did just kept pushing the bur elsewhere.
00:13:38
John S
Yeah, just treat it. Yeah, yeah, yeah, right.
00:13:41
johngrimsmo
And it's still not getting rid of it. So then the lollipop chamfer, I decided to do three chamfers. So like hog it out in the middle and then do a micro chamfer above it and a micro chamfer below it with the ball of the lollipop, which helped a little bit, but still left a little bit of a burn.
00:13:52
John S
um Okay, yep, yep, yep.
00:13:57
johngrimsmo
And then through some other testing with the key seed cutter through the pivot hole, I was able to redo that tool after the lollipop. And I was like, whoa, the bird's gone. And I was like, wait a minute, what if I just stagger the operations here?
00:14:11
johngrimsmo
So I use the key seat to rough out the pocket, leave a few thou, which I want to do anyway for a finished pass, then deburr with the lollipop, and then go back in with the key seat cutter and do the finished pass. And I think the burr is gone now.
00:14:23
John S
Yeah. Cost you a tool change, but who cares worth it.
00:14:26
johngrimsmo
And I think, yeah, I was roughing and finishing in the same setup, same orientation and all that with the key seed cutter, but yeah, cost you tool change, whatever, it's fine.
00:14:36
John S
Yeah.
00:14:36
johngrimsmo
Then we don't have to deburr it by hand, which is amazing.
00:14:38
John S
Totally. Yes. That's awesome.
00:14:41
johngrimsmo
So those are two little wins that I had in the past couple of days.
00:14:45
John S
Good.
00:14:45
johngrimsmo
Very, very happy about that.
00:14:47
John S
Um, speaking of tool life, I, um, The easy and maybe obvious answer on A2 is we dropped the surface footage but in half and so far the tool is holding up much better.
00:15:01
John S
um we Yes, soft A2.
00:15:02
johngrimsmo
Soft A2.
00:15:04
John S
So it's not like it's, machines easy and beautifully.
00:15:05
johngrimsmo
Yep.
00:15:07
John S
Like there's nothing hard about it. Just the tool life was getting chewed up. And when I was talking to one of the YG1 reps, they were like, oh, the higher, I think vanadium and some other, you're not gonna get the same as like 4140, which I'm okay with, but We get great to a life out of 4140. And this was getting fried quickly. um And um just sharing, not defending myself. When I looked at both Sandvik and when I looked at um Helical's Machining Advisor Pro, both the surface footages were ah well above 500. I don't remember exactly what they were.
00:15:37
johngrimsmo
Really?
00:15:37
John S
And I think we were at 400 or 500 when we were experiencing low tool life. And so for now, I dropped it to 250. Now I frankly don't love the cycle time, but right now that's not the battle I need to worry about. And the tool is lasting better. I also finally so you know stopped and figured out how to at least track tool lifetime in the cut on the Okuma.
00:16:01
johngrimsmo
Yeah.
00:16:02
John S
It's kind of almost like I should probably do a video even though it's pretty educated you say I don't want it to like ever really fail the tool out. I just want to know when I decide to change the tool or if the break control detects that the tool has broken.
00:16:13
johngrimsmo
Yep.
00:16:15
John S
How much time did that tool have and so I
00:16:17
johngrimsmo
Hugely valuable.
00:16:18
John S
It was really simple. I just set the tool life management on in the program. Like you can do that at the G code level.
00:16:23
johngrimsmo
Really?
00:16:23
John S
And then on that tool, on the OSP control, you just set it to, I think 999 minutes remaining. And then it starts yeah counting down as the tool is being used from there.
00:16:36
John S
And we just put a little flag on the machine that when you replace this particular tool, you need to go in and reset that data. um So that's a obvious potential fail point, but right now we're all kind of focused on what this tool can do.
00:16:46
johngrimsmo
Is that a sticky note flag or some program thing?
00:16:49
John S
It is a so we have yellow without yellow printer paper um eight back by 11.
00:16:53
johngrimsmo
Okay.
00:16:54
John S
And so whenever we have something in the shop usually it relates to orders.
Tool Life Management Strategies
00:16:59
John S
um And we want to make sure it's absolutely clear to pay attention to it. um We printed on the yellow paper.
00:17:04
johngrimsmo
I like it.
00:17:04
John S
And so I just did the yellow paper and I haven't even changed the tool yet because this one's pretty pretty chowder, but it's okay.
00:17:09
johngrimsmo
Yeah.
00:17:12
John S
And I want to kind of um I bought a couple of lake shores. I got some other ones I want to test later, but we're actually at the point now where we're about to send out a pallet to heat retreat.
00:17:23
John S
So it's kind of like pencils down right now where we've got enough work done.
00:17:26
johngrimsmo
Yep, yep.
00:17:27
John S
So whatever.
00:17:28
johngrimsmo
So that's interesting. Say you give it 999 minutes of tool life and then it starts counting down.
00:17:33
John S
Yeah.
00:17:34
johngrimsmo
um I hate that method. And that's what the Wilhelmin does too.
00:17:38
John S
Okay.
00:17:38
johngrimsmo
I don't know if the new Wilhelmin does, but my old Wilhelmin absolutely does that. um The current starts at zero and starts counting up. You've used this tool for five minutes. I'm like, sweet.
00:17:48
John S
Yeah, I would rather have that too.
00:17:50
johngrimsmo
Because but some arbitrary number of a thousand counting down.
00:17:54
John S
Yeah.
00:17:54
johngrimsmo
And then what if you want to bump the tool life? What if you want to, oh yes, it lasts way longer than a thousand. Then you what are you adding to what to make it make sense to you?
00:18:02
John S
Yeah.
00:18:03
johngrimsmo
So I love the count up method. Like it's just, it's logical. And on the current, so I can say I set a thousand minute tool a life, but I count up from zero.
00:18:06
John S
Yeah.
00:18:11
johngrimsmo
And then when I'm at 900 minutes of tool life, I see that and I'm like, check the tool. It's nearing tool life inspected.
00:18:16
John S
yeah
00:18:17
johngrimsmo
It's got 900 on it, but the whole, like, it's got 27 left from 999 from, from what?
00:18:23
John S
Yeah.
00:18:24
johngrimsmo
I don't love that. Um, I don't know if I'm the weird one and everybody else, every machine just does this, but.
00:18:33
John S
you're You're one step beyond me. I agree with your thinking. I'm also just happy that I got what I wanted, which is i nobody know one of those things I didn't sort of anticipate you know months or years ago.
00:18:37
johngrimsmo
Absolutely. Yeah.
00:18:44
John S
like It's really hard to stop and like actually try to prove out how productive a tool can be.
00:18:49
johngrimsmo
Yeah.
00:18:49
John S
um And now this lets us at least run them normally and then say, okay, hey, we've made eight of these parts. It's actually been in the cut for 47 minutes. This is what it looks like. um
00:19:00
johngrimsmo
Is it actually measuring in the cut time? Like not retracts, not all that stuff or?
00:19:03
John S
it
00:19:06
John S
um so So I believe it's in the cut. I am sure, I don't know how it's done, John. Is it G1s?
00:19:16
johngrimsmo
Yeah.
00:19:16
John S
Is it linking moves? Rapids, I don't think so. Like if it's, I don't i don't know. But it's not it's not just the cycle start time while that tool's in the spindle, if that makes sense.
00:19:22
johngrimsmo
Hmm Interesting Okay on the on the current
00:19:27
John S
I'm pretty sure it is something that's closer to being in the cut. But no, I guess your point, if you're doing adaptives where you're moving two inches back outside the cut, um I have to think it's counting that. Yes, it is, because I've sat there and watched it. Sorry. Yeah.
00:19:45
johngrimsmo
I thought it was just measuring spindle time, but my warmup tool, which just tool changes and stays in the same spot and doesn't warm up, does not count up on time.
00:19:56
John S
Okay.
00:19:58
johngrimsmo
So maybe it is but in the backend kind of measuring G1s, not G0s kind of thing. I don't know.
00:20:05
John S
It won't really matter for me because I'm just trying to compare A to B. So it's just the relative consumption, if you will.
00:20:08
johngrimsmo
Yeah, totally. Yeah.
00:20:12
John S
You know, I want to start of actually like laughing because I'm like, do I need to go back to like old school, go really slow, slow our set them with like a 50% step over, like kind of the old like almost Bridgeport style cutting.
00:20:22
johngrimsmo
to cut A2, yeah.
00:20:23
John S
um Well, yeah, because the guys on one side, we're talking about how sometimes you just need to aim for getting as much productivity out of a 45 minute to a life as you can, like it's only the last 45 minutes.
00:20:35
johngrimsmo
But talk about that a bit more about what the guys were saying, because I thought that that was kind of interesting.
00:20:39
John S
Yeah, I'm more in the listen than I am profess knowledge here, but I think what they were saying, we'll see if they clarify next week when they listen to this. I think what they're saying is that carbide, when it's run well, should only last for 45 minutes. So you need to do everything you can to get the most out of it. So obviously that means higher service footage, higher feed per two, higher step over, higher, less axial is probably less relevant because whatever. So it's really, I think there's three, radial depth of cut.
00:21:07
John S
service feed and feed per tooth. But I was getting my butt kicked on service footage, so I dropped that in half. I'm still, I'm at like 10% step over in 2,000 feed per tooth, so that's not by any means the max.
00:21:22
John S
It's also not total baby either. Well, 10% is a little light, but 2,000 per tooth in a per two and a half.
00:21:24
johngrimsmo
Yeah.
00:21:28
johngrimsmo
That's normal.
00:21:30
John S
I don't actually like my map, but yeah.
00:21:32
johngrimsmo
Easy peasy.
00:21:34
John S
So yeah.
00:21:35
johngrimsmo
Kind of reminds me of, wasn't it like Enzo Ferrari said that a Formula One car should fall apart after the finish line?
00:21:39
John S
Porsche. Porsche Ferdinand. like oh Yes, as soon as it crosses the finish line, you should just disintegrate into a bucket of bolts.
00:21:43
johngrimsmo
Was it?
00:21:46
johngrimsmo
Yeah. Otherwise, you've overbuilt it, like.
00:21:49
John S
Yeah. Yeah.
00:21:52
johngrimsmo
Yeah.
00:21:52
John S
Yeah.
Creating Shop Tutorials with Raspberry Pi
00:21:55
John S
My two other the kind of things, well, I have actually quite a few more things, but number one, we visited Henry Holsters last week, and number two, I got to talk about Raspberry Pis.
00:22:02
johngrimsmo
Oh yeah, yeah.
00:22:07
johngrimsmo
I'm in. Go.
00:22:09
John S
Okay, Raspberry Pi because it's quicker. um I had this idea and then actually, frankly, visiting ah Andrew at Henry Holsters was kind of what helped ferment this sort of a thing, which is I want a, we have a series of videos we've recorded on our Okamoto grinder, although clearly about what I'm about to say could be easily applied to different processes or machines throughout any shop or business.
00:22:32
John S
Even I get confused on certain things on how I want to do on the grinder. Like when I want to make a seven tenths touch off to changing it, it's just a different way of doing it. Or common error message is what's going on. Why do I need to, why is this error message happening? So let's say I have five videos of common scenarios that I want to be able to use as a reference. Those exist, they're on my computer, or anyone's computer, or the shared drive, but like, there's no grinder, there's no computer near the grinder and it's kind of a hassle and you gotta go back, you gotta even know who knows if they're there.
00:23:03
John S
So I hired an upward guy who's building a Raspberry Pi interface that we can then edit, change the language, the thumbnails, the videos, and I assumed leave.
00:23:12
johngrimsmo
Cool.
00:23:13
John S
replicate it elsewhere in the shop. I bought a Raspberry Pi, which I haven't bought a new Raspberry Pi in 10 years, and a touchscreen, 10 inch touchscreen for under a hundred bucks.
00:23:21
johngrimsmo
Yeah.
00:23:21
John S
And I'll 3D print a case and it will live on the Okamoto. It'll hopefully turn on when the Okamoto turns on, because that would be better. And then it'll just have those five videos as thumbnails. And when you are stumped on why you're getting a crossfeed alarm, like that machine is frankly stupid on the settings to where you have to manually disable the crossfeed when you switch from jogging into cycle mode.
00:23:43
John S
um that That will be a video, you hit it and it'll play an eight second video that will walk you through what that alarm is. Right? what Yeah.
00:23:51
johngrimsmo
I like it. I think Pearson would print QR codes.
00:23:59
John S
Okay. No, I'm not against.
00:24:00
johngrimsmo
that's ah That's like Russia took a pencil to the space kind of thing.
00:24:05
John S
What's that mean?
00:24:06
johngrimsmo
Like Americans spend a million dollars to invent the pen that will write in space, but Russia took a pencil?
00:24:08
John S
Oh.
00:24:10
johngrimsmo
Like, that's the joke.
00:24:13
John S
Okay. um
00:24:15
johngrimsmo
ah But I like your idea. I think it's i think it's neat.
00:24:17
John S
No, you it's a fair criticism. I have a very like love-hate relationship with phones right now um as well and distractions.
00:24:24
johngrimsmo
sure
00:24:25
John S
That's part of the distraction of walking you back to my shop is like, well, then I'm going to get distracted. um There's an elegance, if it really is, if this really works, and I think it will, you're talking about $150 in hardware for everything, the pie, the touchscreen, and it's, to me, a much more fluid outcome with the dynamic thumbnails, but I see you, pure code is, QR codes are free and everyone's got a phone, so, okay.
00:24:55
johngrimsmo
But play it out. I think you're you're almost almost there anyway.
00:24:56
John S
Yeah.
00:25:01
John S
But I was setting up that pie, and I, again, haven't done that in 10 years. And I'm sitting here at my desk yesterday, and I flashed the SD card, I put it in, I connected the HDMI to the touchscreen, and I booted up this computer, and the screen is literally 10 inches.
00:25:12
John S
So it's like tiny on my desk, and it's a fully functional web browser.
00:25:14
johngrimsmo
Yeah. Yep.
00:25:16
John S
And it just had one of these moments of like, we live in a great time, John. We live in an incredible era in time that for $30, whatever that pie cost, actually, I think I'm lying.
00:25:27
John S
I think the pie was more than $30 because I bought whatever.
00:25:29
johngrimsmo
Yeah.
00:25:30
John S
but insane, like just incredible. So, yeah.
00:25:34
johngrimsmo
yeah Yeah, as I've talked about, I've been digging into my pie my my tool tracking pie quite a bit more over the past few weeks and I've learned a lot more. And then I gave it all to Phil and made him learn it. ah hum So he's been getting really good at pie too stuff. um And it's I wish I was able to utilize them more for more things because they're just so capable and so cheap and so powerful.
00:25:59
johngrimsmo
it's It's not what I do. There are solutions to solve very specific problems for me, which is great too.
00:26:04
John S
Yeah.
00:26:06
johngrimsmo
I was trying to use one pi to track tool data from the speedio and from the current, but these older machines, they're not that old, but um dumber machines
00:26:15
John S
Okay.
00:26:22
johngrimsmo
don't like all the new security protocols of the new pie.
00:26:24
John S
to Yeah.
00:26:25
johngrimsmo
I think we talked about that last week. So I solved that on the Kern, but I couldn't solve it for this video. So I just plugged in my old pie and and now I have two pies running one for this video, one for the current and it just works.
00:26:34
John S
yeah
00:26:35
johngrimsmo
And I'm like, you know what?
00:26:36
John S
Great.
00:26:37
johngrimsmo
Problem solved.
Self-Made Solutions vs. Subscription Services
00:26:38
johngrimsmo
Now I just have two pies running. Who cares?
00:26:41
John S
and Some of this was also inspired by Andrew, Henry Holsters had a, what would you call it? Like a portal display dashboard from a company called Yodeck.
00:26:54
John S
And I looked them up and it's quite interesting. And I will readily admit this may be my own just bootstrapper,
00:26:56
johngrimsmo
Yeah.
00:27:03
John S
a maybe a bad outcome, but I just loath this idea of paying $8 or $15 per screen per month for this type of these types of services. um I think in some respects, it sort of also, it doesn't, not to say that it hinders ah innovation, but like it is what drives people like me to just go roll your own, because It's not going to be expensive to do this on my own.
00:27:27
John S
It's not complicated. And I just don't want all these subscription services and all that.
00:27:31
johngrimsmo
Yeah.
00:27:31
John S
in But then you look at what the shop that they built, and it's full of stuff like that. And they are they're doing great. They're doing really well.
00:27:37
johngrimsmo
Yeah.
00:27:38
John S
so um Yeah.
00:27:39
johngrimsmo
Yep.
00:27:41
John S
Yeah.
00:27:42
johngrimsmo
So what else did you gain tying into his shop tour?
00:27:46
John S
Uh, so that's a good question. Um, I'm going to talk. He asked me to go on their lean. I'm going to cheat on you. He asked me to go on their lean bill next week. So sorry, I'm going to visit.
00:27:56
johngrimsmo
I'll allow it.
00:27:57
John S
Yeah.
00:27:57
johngrimsmo
You gotta haul past this week.
00:27:58
John S
Um, and well, so it's kind of weird because he wants me to, he's, I forget his words, like basically what, what don't you like? What did you see? We like sort of one of those.
00:28:06
johngrimsmo
Sure.
00:28:07
John S
And I'm like, you know, I just, it was a great. tour. He's got so much passion and conviction and I yeah know i spent two, three hours there. so i i It wasn't like I walked out of thinking like, oh man, there's a bunch of things. is like It was a great tour. um I give them so much credit on their standardization, on their focus, the the shop looked great. um It's just, it's so different than our shop. you know They're making small parts that are made out of like, I don't think it's Kydex, but plastic type stuff, whereas we're making a hundred pound fixture plate, like big things. So we need aisles in different space settings, ah the flow.
00:28:49
John S
um They were cranking, they had a really impressive, the shipping system, the the inventory, the packaging, like it was all all there. It was really, oh here, I can kind of scroll through my phone.
00:29:02
johngrimsmo
Of
00:29:02
John S
I took a bunch of pictures of stuff that just caught my eye and a lot of it was the little quality of life stuff. um
00:29:07
johngrimsmo
course. one shop owner to another like, ooh, I like that.
00:29:12
John S
Yeah, you know, how do you hold your drills? How do you hold um your the stuff they had to like, like look at the bamboo setup.
00:29:19
johngrimsmo
Okay, they got three bamboo printers side by side, all perfect on a wooden table with what's underneath.
00:29:24
John S
Underneath is a drying oven and trash above is the filaments nice and stored.
00:29:26
johngrimsmo
Okay.
00:29:29
John S
They had nice little labels for which of the but AMS bins had carbon fiber in them. It looked really nice. um What else? They have a new cant system, little things too that are, this this is great, the gravy stuff, it is silly, but they have a air gun hanging on a piece of paracord right over the load station of their RS450.
00:29:50
johngrimsmo
Okay.
00:29:54
John S
So when you need to blow off the um the plastic shavings from your holster mold, you just squeeze the thing, it's like hanging right there in place. You're not having to pick something up, aim it over, squeeze it and put it back away.
00:30:06
johngrimsmo
Yeah.
00:30:07
John S
So that was nice. Oh, they had these Milwaukee backpack vacuums, which I don't know if I wanna buy them, but the way they had them, they were set up, the batteries were there, you could, it's mounted on the wall, so you could just back your back up to it, put it on, and go around and vacuum, like, okay, that's great, I like that.
00:30:12
johngrimsmo
Heard of those.
00:30:24
johngrimsmo
kind of kind of no excuses now like it's it's fun quality like that's kind of cool
00:30:27
John S
Yeah.
00:30:31
John S
They had replaced most of the, any machine that has enclosures that ever remotely need open, they just printed um three d printed parts with magnets and it's becomes a tool-less entry.
00:30:44
John S
Yeah, agreed. That's the kind of stuff we're already starting to do here since the visit. um Yeah, that was the,
Empowering Team Members in Problem Solving
00:30:52
John S
and those are the, yeah.
00:30:52
johngrimsmo
It's a mentality of like fix what bugs you, fix everything that bugs you and you know print it, slap it together with plywood, just just fix the problem and then iterate on that over and over again.
00:31:04
johngrimsmo
And we do a decent amount of that, but not to that kind of level where everything gets attention.
00:31:08
John S
Yeah.
00:31:11
John S
Yeah. Great visit. I appreciate him showing. We took the most of the people from the shop ended up going over there. It's a little bit of a drive.
00:31:18
johngrimsmo
Good, good.
00:31:18
John S
um Had a good time. um Yeah, it's nice.
00:31:22
johngrimsmo
Well, it's like some of the guys in my shop have never really been to another shop before.
00:31:26
John S
Oh, really? Yeah, sure.
00:31:26
johngrimsmo
Right? So like, like it would be super valuable for them to just tour other places and get a, get a nice, you know, owner's perspective of some other operating shop. Um, even if it's just to go, that's not how we do it, but that works better.
00:31:40
johngrimsmo
Maybe we should reconsider like.
00:31:40
John S
yeah
00:31:43
John S
yeah And a lot of that comes back to what I had mentioned last week of a lot of those things. I mean, like what he does with Lean and all that stuff is beyond what my intrinsic, like he's better at that than me.
00:31:58
John S
That doesn't mean I don't want to be better than what we do now.
00:32:00
johngrimsmo
For sure.
00:32:00
John S
And I think we're so okay at it. A lot of that stuff is the do its stuff that I just didn't do this year. Like, oh, okay. Like we can talk, we can, we can come by on more about why I didn't do it, but um do I start carving away
00:32:08
johngrimsmo
Yep.
00:32:15
John S
um I should. um
00:32:18
johngrimsmo
i think I think the key here that maybe you're missing is that other people, Paul Akers and and Pearson and Andrew Henry and others really embody is that it's not the owner's job to do all the do-its, it's everybody's job.
00:32:33
johngrimsmo
So like all of those do-its should be done by everybody else in the company, not by you.
00:32:34
John S
Yeah. It's a good point, actually.
00:32:38
johngrimsmo
You'll have your your sliver of them. Or get the people, especially, like if I give a guy a task, he'll be like, okay. But if he comes up with it himself and I fuel the fire and let him do it, same with my kids.
00:32:48
johngrimsmo
like If it's their idea, they'll be way more excited to do it than if it's my idea.
00:32:49
John S
Yeah, yeah.
00:32:53
John S
It's actually a three point.
00:32:55
johngrimsmo
Yeah. And then I'm not super great at it either, like an encouraging an environment where like, Oh, that bugs you. how How are you going to fix that?
00:33:02
John S
Yeah.
00:33:03
johngrimsmo
You know, in, um, I forget what book it is.
00:33:05
John S
Yes.
00:33:07
johngrimsmo
Maybe an attraction book. They say, you know, manager sitting in his office and all day, everybody's bringing monkeys into his office and you know, i problems, you know, things.
00:33:16
John S
Mm hmm.
00:33:17
johngrimsmo
And by the end of the day, he's just got 50 monkeys running around his office. and the The goal is to have everybody leave with their monkey, you know? And you go fix your own monkey, you know?
00:33:28
John S
Yeah, yeah, yeah, right.
00:33:29
johngrimsmo
I'll give you ideas and help and advice and and encouragement and whatever you need to get it done, but you're you're gonna fix your own monkey.
00:33:37
John S
That's a good point.
00:33:41
John S
I like that.
00:33:46
John S
Sorry, I'm not, I'm making a note. I like that a lot more.
00:33:50
johngrimsmo
Good, yeah, just crunch on it.
00:33:54
johngrimsmo
Because it puts so much, I mean, we both put too much pressure on ourselves to run these companies and to do everything we need to do and to, you know, buck stops with us.
00:34:05
johngrimsmo
And at the end of the day, we are 100% accountable for everything that happens in this company, even if we didn't do it.
00:34:06
John S
Yeah.
00:34:14
johngrimsmo
So I certainly put way too much on my plate that important things and not important things and definitely things that could be done by other people.
00:34:20
John S
Yeah.
00:34:23
johngrimsmo
and
00:34:23
John S
Yeah.
00:34:24
johngrimsmo
Like last night I came back to the shop late. I was here from nine till one something. um And I spent a solid hour researching animals.
00:34:35
johngrimsmo
because I went down this little rabbit hole of like, I need an engraving animal, it's good for titanium, it's strong, blah, blah.
00:34:35
John S
Oh, yeah.
00:34:41
johngrimsmo
And I got to the end of that hour and I was like, dude, this is your prime time, like nighttime in the shop. You should be doing stuff. You could do this on the weekend. You could do it. Anybody somebody else could maybe do this.
00:34:53
johngrimsmo
Like maybe I shouldn't have spent that hour in my like free time in the shop.
00:34:58
John S
Oh, yeah.
00:34:58
johngrimsmo
Like nobody's here to bug me. um I could have been more productive, you know what I mean? And that's not a job that had to get done right now. I was just excited about it right now. So, yeah.
00:35:11
John S
i'm I'm kind of with you on that, John. Sorry. Like I, there's something to life of like when I have a passion, um, and I get excited.
00:35:21
John S
Look, let's, let's like talk about it as well. John Saunders, and I think Junkers of 10 years ago, when I saw a cat 40 tool change in arm, dual tool change, my jaw was on the floor.
00:35:30
johngrimsmo
Yep. Totally.
00:35:31
John S
That didn't happen anymore. So when you do get fired up about something, I'm okay.
00:35:35
johngrimsmo
Yeah.
00:35:36
John S
Tickling that, scratching that edge.
00:35:36
johngrimsmo
I'm generally fine with it too. But, uh, when I have things that are way more important and my brain is telling me that this is more important, but then I get to the end and I go, that could have been done this weekend.
00:35:43
John S
Yeah.
00:35:48
John S
Mm hmm.
00:35:48
johngrimsmo
Like. That's not important right now. Yes, it is a problem I want to solve and it's important to me and it's exciting. And I was like, I'm looking through all the data sheets and like learning about rake angles and stuff.
00:35:59
johngrimsmo
I'm like, it's great. I don't need to be sitting in my shop with machines all around me, idle waiting for me doing this right now.
00:36:02
John S
Hmm.
00:36:08
johngrimsmo
And it's a perspective thing. Like, um, I wasn't mad about it. I was just like, you could be better. Just choose your time a little bit better. Um, and then I did some other things after that, which was helpful, but.
00:36:19
John S
Yeah, not a good Yvonne, Alex and I had a good conversation just about like, okay, 2025 project management, how are we distributing stuff?
00:36:21
johngrimsmo
ah
00:36:28
John S
How are we handling accountability? Who could be holding up? Who what's priorities? Like it's all like business 201 stuff. But like, um, you know, do you go to a sauna?
00:36:35
johngrimsmo
who
00:36:38
John S
Do you do physical boards? Is it when we have our Tuesday meetings?
00:36:41
johngrimsmo
Here.
00:36:42
John S
Um, is it just rifle shot communication? Um, yeah.
00:36:48
johngrimsmo
Good. And it's it's good you guys are talking about that.
00:36:53
John S
What have you been up to this week or what's on your plate?
00:36:55
johngrimsmo
oh
00:36:58
johngrimsmo
with With the engraving end mill deep dive, so you know the Lakeshore tapered engraving end mills?
00:37:01
John S
I know well.
00:37:05
johngrimsmo
I realized I have four, possibly five of the 10th out ones in the current for different purposes.
00:37:11
John S
Okay.
00:37:12
johngrimsmo
I was looking at the last used tool life in the tool table and I'm like, I really need this many. Like, can I consolidate them? um They work pretty great in stainless steel. In titanium, they tend to, they work great sometimes and they they push instead of cut. Some other times the 10 thou ball ones, they're really pokey. And as I look at them closer and closer under the microscope, the grind varies between tool to tool or batch to batch. And some of them are just not ground as perfectly as others.
00:37:44
John S
Go.
00:37:45
johngrimsmo
um And maybe we're reaching a point, or I'm reaching a point of attention and requirement of finish where I need to step up to the next level of tool for this specific purpose.
00:37:54
John S
Mm hmm.
00:37:56
johngrimsmo
Um, so that's why I was looking at multi-node NS union, uh, and And, uh, I sent a quote off this morning to get a pricing on union, similar while engraving emails.
00:38:09
johngrimsmo
Um, Because the beauty with those three companies is they make geometrically accurate tools. like That's their thing, right? The corner radius is perfectly tangent to the side wall, if that's important to you. The flutes are always going to be sharp. They're always going to be here. The coatings are on point. There's a lot of good reasons. So that was part of that feedback.
00:38:35
johngrimsmo
What else? What else? Finalizing a bunch of the fixtures made for the Fiels.
00:38:37
John S
Yeah.
00:38:39
johngrimsmo
Did I tell you about the pullout dowel pins that I'm using?
00:38:42
John S
Pull out. No.
00:38:44
johngrimsmo
You know, a dowel pin, you just hammer it in the hole and it's stuck.
00:38:46
John S
Yeah.
00:38:47
johngrimsmo
Pullout dowel pin has threads on one side, so you can screw it and then yank it out.
00:38:49
John S
Oh, sure. Yep.
00:38:52
johngrimsmo
So I've been using more of those. I used to machine locating features into the fixture so that like a boss would stick out, but I'm machining the whole surface down.
00:39:01
John S
Yeah, sure.
00:39:02
johngrimsmo
Locate a blade against three points or something like that.
00:39:03
John S
Yeah.
00:39:05
johngrimsmo
And then it kind of occurred to me, A, I don't like that because then I can't easily like stone the surface because I have these machine features.
00:39:10
John S
Right. Totally agree. Mm hmm.
00:39:12
johngrimsmo
And now that we're so into like flatness and stoning and precision flat stones and all that stuff, I'm like, ah, is there a better way to do this? So with a pull-out dowel pin, you can drill and ram a hole to just undersize perfect.
00:39:26
johngrimsmo
You can pound in a dowel pin. And if you ever have to pull it out, it pulls out easily. Problem is they would just slide right in the hole. And there's, there's supposed to be slightly oversized 6.0, whatever millimeters.
00:39:39
johngrimsmo
And I ream a six millimeter hole in the dowel pin, the push in or, um, what do they call oversized dowel pin slips right in and comes right out. I'm like, Oh, that's, that's not as fun.
00:39:51
johngrimsmo
I could glue it in like a couple of different ways to do it. Right.
00:39:54
John S
There's a, it's worth mentioning, because I just, well, I just learned about it last year.
00:39:55
johngrimsmo
Uh, Okay.
00:39:58
John S
There's a Loctite green, I think it's like a 608. It's like a retainer compound. So it's not Loctite like Threadlocker. It's different and it's meant for this exact purpose.
00:40:05
johngrimsmo
Yeah. really interesting um so it turns out that some of my holes um i think i was doing a five millimeter clearance hole because i have a through cool at five millimeter drill and then i have a 5.8 millimeter finishing drill to get the perfect size ream hole like pre-ream hole
00:40:08
John S
Yeah, yeah.
00:40:15
John S
Look at that. No.
00:40:29
John S
okay
00:40:32
johngrimsmo
So I'm through cooling five millimeter hole. I'm supposed to solid carbide 5.8 millimeter drill and then remit to six millimeter.
00:40:37
John S
Okay.
00:40:40
johngrimsmo
But in some of my operations, I forgot the 5.8 millimeter drill.
00:40:41
John S
Ugh.
00:40:43
johngrimsmo
So I'm just drilling a five millimeter hole and then plowing a reamer right through it, like way too much engagement.
00:40:44
John S
Can you read me?
00:40:49
johngrimsmo
And that's making a big hole. I'm like, Oh, ah like, yeah, it's pretty deep hole, but it's fine.
00:40:51
John S
Sure. Dude, you have an incur and just interpolate this stuff. Oh, okay.
00:40:58
johngrimsmo
And it's fast drill, whatever. Um, And then, so I've got all these fixtures made with oversized holes. And I'm like, what's a decent way to to do this?
00:41:08
johngrimsmo
The first way I did was I took a little um punch and i I peened the top.
00:41:12
John S
Mm-hmm. Sure.
00:41:12
johngrimsmo
Like I put a couple of dents in the top. Cause I'm like, it just needs to not fall out. Like.
00:41:16
John S
Yeah.
00:41:17
johngrimsmo
It's not a critical thing. um And that worked OK, but it messed up the top surface, which I didn't like. And then I realized I can take a broken pointy end mill and I can scratch the inside.
00:41:27
johngrimsmo
I can put little dents down the bore to kind of and then as you push in the dowel pin, it's just going to shove them away.
00:41:28
John S
Yeah.
00:41:34
johngrimsmo
And who cares? Like, and that worked.
00:41:35
John S
You can peen, you can take a punch and peen the inside as well at an angle and you're swaging it out.
00:41:38
johngrimsmo
Yep, that's what I did. Yeah.
00:41:39
John S
Okay. Yes. Yeah. yeah
00:41:41
johngrimsmo
And you just put a bunch of scratches and dents and like little chips in there and it it tears up a carbide end mill. It just keeps chipping it cause it's so brittle, but it worked well. I was like, that's a little hack felt pretty good about that.
00:41:54
johngrimsmo
um But yeah, having three dowel pins now lets me align a blade. Repeatedly, you know, you use two of them as kind of a skate, like you put it against two and then you slide it against the third.
00:42:04
John S
Yeah.
00:42:05
johngrimsmo
And then it's easy, simple clamps, tighten it down. All good.
00:42:10
John S
ah Loctite 638 is what I was referring to. and not But when I read the description, maybe it's not perfect here, because it's ah for retaining all metals, fitting cylindrical parts, but it wants a gap of 0.15 to 0.25 millimeters.
00:42:27
John S
So it wants to have a gap of 6 thou to 10 thou.
00:42:28
johngrimsmo
big up
00:42:31
John S
So that's it's maybe not perfect for something that's just beyond a slip fit. But what we've done more of on stuff like this, where it's appropriate is, 3D printed inserts with with with secured in there with um screw metal screws or just 3D printed inserts that's pressed in.
00:42:50
johngrimsmo
oh
00:42:51
John S
And like these are all, it tweets their own um for all sorts of different reasons, but a lot of times that's sufficient for just what you're doing when it's a locating feature.
00:42:55
johngrimsmo
That's a big app, yeah.
00:43:00
John S
And I like it because there's some instances where I don't want to have a metal part end up getting messing with the situation and it's just nice because we then print extras those go in the process bins and then if you want to rip them off stone it and put new ones in it just feels nice to do it that way.
00:43:09
johngrimsmo
Yep.
00:43:17
johngrimsmo
I like that.
00:43:25
johngrimsmo
storie So what do you got going on for today and the rest of the week?
00:43:25
John S
Yeah sweet.
00:43:30
John S
What is on my list? Wrapping up the year end stuff. Been 3D printing a bunch. I got a bunch of research to do on like just chewing on what? I feel like that happens every two years.
00:43:43
John S
I'm like, I wish IMTS was next week, but whatever.
00:43:45
johngrimsmo
Yeah. And you went here a couple months ago, like most likely.
00:43:48
John S
I went. You coming in 26, John? Okay.
00:43:53
johngrimsmo
Yeah. Yeah, for sure.
00:43:54
John S
Let's do that.
00:43:54
johngrimsmo
I'll go again.
00:43:56
John S
um
00:43:56
johngrimsmo
Um, definitely look at machines with hide nine because I'm just a big fan.
00:44:00
John S
Yes.
00:44:01
johngrimsmo
So many reasons.
00:44:01
John S
I want to go filter out who, yeah, right.
00:44:03
johngrimsmo
Yep. What you're going to build some machine tool database. That's like, I want this control and I want this much travel and I want this and it filters and you're like, you want this machine.
00:44:13
John S
Yeah. No, there's that tech specs. It's kind of like, eh, but I'll try it.
00:44:16
johngrimsmo
Probably.
00:44:17
John S
um
00:44:20
John S
Running with a bunch of improvements that we did on again just stuff that's kind of inspired by combination of Henry holsters visits and do it 3D printing magnetic transfer blocks, you know those but for grinder magnetic chucks where you want to transfer the magnetism through a riser.
00:44:37
johngrimsmo
Okay.
00:44:38
John S
um We made one ah the Adam Dema style with aluminum and then nails and then ground it frankly a Great idea and Adam did a great job in his video on it But a lot of work bought some from a retired tool maker off eBay They were I thought it was aluminum.
00:44:55
John S
It was delrin. So when we tried to machine into our shape. It didn't go well um and so I'm realizing I'm going to print them out of
00:44:58
johngrimsmo
Hmm.
00:45:03
John S
ah asa which I think is a little bit more chemical resistant than like PETG. And here's a little cutaway of a sample, but just a little dowel pin pressed through there. This will be a big circle.
00:45:14
johngrimsmo
Okay.
00:45:14
John S
And then the dowel pins will press through to have 15 thou exposed on each side of the 3D print. Then I'll drop on the yokomoto, kiss them, grind them off. So you now have a parallel surface magnetic transfer block that's 3D printed, which I think will be totally fine to last in perpetuity.
00:45:30
johngrimsmo
And all you're doing is is standing up a whole bunch of Dalapin soldiers, a hundred little soldiers standing up decking both sides so it's flat and that will transfer enough magnetism up through it.
00:45:36
John S
yep Yes.
00:45:42
John S
Yes, it will.
00:45:43
johngrimsmo
Interesting.
00:45:44
John S
That I know, because we made the one out of aluminum with nails.
00:45:46
johngrimsmo
Yeah.
00:45:47
John S
Yeah.
00:45:47
johngrimsmo
That was cool.
00:45:48
John S
Yeah. So printing those right now.
00:45:51
johngrimsmo
I like that.
00:45:52
John S
But it was like a bunch of little test fits to get the 3D prints press fit just right, because I didn't want it to be too loose, but I also didn't want it to be such that it would cause cracking.
00:45:55
johngrimsmo
Yeah.
00:46:02
johngrimsmo
I can imagine the whole thing, as you push in more and more pins, it's going to warp and bow and be weird.
00:46:09
John S
We'll see, I think it'll be okay.
00:46:10
johngrimsmo
Oh, because you're swaging material to push a pin in. So that material has to go somewhere. It's going to go into the next hole and then into the next hole. And I don't know.
00:46:18
John S
Yes, no you're right, we'll see.
00:46:20
johngrimsmo
Maybe it's fine.
00:46:22
John S
I think it'll be fine, but yeah, um to your point we probably should stress this because I do not have any interest in throwing a part on the grinder.
00:46:23
johngrimsmo
Yeah. Yeah.
00:46:29
johngrimsmo
Yes.
00:46:29
John S
Do not, hard pass.
00:46:32
johngrimsmo
Exactly.
00:46:32
John S
Sweet. um I won't see you next week, is this Christmas? We'll figure it out.
00:46:37
johngrimsmo
Sure. Yeah. We can take next week off.
00:46:38
John S
Okay.
00:46:39
johngrimsmo
That sounds good.
00:46:39
John S
Well, Merry Christmas, everybody, or happy holidays.
00:46:41
johngrimsmo
Yeah.
00:46:42
John S
we Yeah, we we we love having this community chat, and we love that people get something out of it.
00:46:47
johngrimsmo
Yeah, exactly. We all just get to express our brains and think of problems.
00:46:54
John S
Agreed.
00:46:55
johngrimsmo
Yep. I mean, Merry Christmas.
00:46:56
John S
See you, Merry Christmas.
00:46:57
johngrimsmo
Okay. Bye.