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Re: Slitting on a Unimat SL? #db200

 

Got parts to make a separate power supply for each motor, and one (of 3) is probably going to become a tool post grinder...

Many thanks!?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 01:00:06 PM CDT, Steve Johnson <steve@...> wrote:


Attaching the .stl files. There is a full piece, and then a bottom half piece. For the green sand two part mold, I'll first use the bottom half piece, fill one half of the mold with sand, pack it firm, then flip it over, remove the bottom half, replace with the full piece, dust with talc, add the top part of the mold and fill/pack with sand. Cut in sprew and vent. Then lift off the top, remove the full piece, replace the top, and pour.?

Sounds like we are on similar/parallel paths - yes, same exact DC motor (3 holes instead of 4), and to SLs, one lathe and one mill.

Might give Fusion 360 a try. I can help answer questions with that but not the others.


On Apr 19, 2023, at 11:48 AM, William R. Meyers <wmrmeyers@...> wrote:

One like yours would be a good start, I think. Motors I'm going to be using are the ZY6812 150W 24vdc motors. Drawing for them shows 4 holes, but I think the motors actually have three, like you mention. I have Solid Edge loaded on the computer, and don't seem to have enough concentration to stick with the training videos. Had the same problem with Solid Works, and FreeCad, and all the others. I've got two Unimats, a DB & an SL, according to their labels, but both are alloy castings. One has plastic handles, the other aluminum. Planning on setting one up as a milling machine, and the other as a lathe. Also planning on having slow-speed and high speed capabilities, by changing out the motor plates and pulleys.?

I do have a larger lathe, an Atlas TH42 that is operational, and three other machines that are supposed to be milling machines. One of them might actually work with a little TLC.?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 12:08:35 PM CDT, Steve Johnson <steve@...> wrote:


Bill, if you are needing a mount like mine, for a DC motor and without the idler shaft clamp, I will happily share my .STL file with you.

I will definitely be investing in slitting saws, just need to figure out what would be best for the little Unimat SL Mill setup. In the meantime, I'll take a few shaves with my band saw.

For 3D design, once you get going you won't be able to stop designing and printing. Sometimes I just print little templates and jigs. For example, the DC motor has 3 holes, 120 degrees apart. While I could lay it out by hand, I'll design a little template with the 3 holes, and a center extrusion to self center on the big hole in the mount.?

I highly recommend Fusion 360 - there is a free version, Mac or PC, which will do everything you want. A learning curve, for sure, but there are? gazillions of how-to videos online. I stick to some basic primatives, every now and then I get to learn some new tricks.

Re: Slitting on a Unimat SL? #db200

 

¿ªÔÆÌåÓý

Attaching the .stl files. There is a full piece, and then a bottom half piece. For the green sand two part mold, I'll first use the bottom half piece, fill one half of the mold with sand, pack it firm, then flip it over, remove the bottom half, replace with the full piece, dust with talc, add the top part of the mold and fill/pack with sand. Cut in sprew and vent. Then lift off the top, remove the full piece, replace the top, and pour.?

Sounds like we are on similar/parallel paths - yes, same exact DC motor (3 holes instead of 4), and to SLs, one lathe and one mill.

Might give Fusion 360 a try. I can help answer questions with that but not the others.


On Apr 19, 2023, at 11:48 AM, William R. Meyers <wmrmeyers@...> wrote:

One like yours would be a good start, I think. Motors I'm going to be using are the ZY6812 150W 24vdc motors. Drawing for them shows 4 holes, but I think the motors actually have three, like you mention. I have Solid Edge loaded on the computer, and don't seem to have enough concentration to stick with the training videos. Had the same problem with Solid Works, and FreeCad, and all the others. I've got two Unimats, a DB & an SL, according to their labels, but both are alloy castings. One has plastic handles, the other aluminum. Planning on setting one up as a milling machine, and the other as a lathe. Also planning on having slow-speed and high speed capabilities, by changing out the motor plates and pulleys.?

I do have a larger lathe, an Atlas TH42 that is operational, and three other machines that are supposed to be milling machines. One of them might actually work with a little TLC.?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 12:08:35 PM CDT, Steve Johnson <steve@...> wrote:


Bill, if you are needing a mount like mine, for a DC motor and without the idler shaft clamp, I will happily share my .STL file with you.

I will definitely be investing in slitting saws, just need to figure out what would be best for the little Unimat SL Mill setup. In the meantime, I'll take a few shaves with my band saw.

For 3D design, once you get going you won't be able to stop designing and printing. Sometimes I just print little templates and jigs. For example, the DC motor has 3 holes, 120 degrees apart. While I could lay it out by hand, I'll design a little template with the 3 holes, and a center extrusion to self center on the big hole in the mount.?

I highly recommend Fusion 360 - there is a free version, Mac or PC, which will do everything you want. A learning curve, for sure, but there are? gazillions of how-to videos online. I stick to some basic primatives, every now and then I get to learn some new tricks.

DC Motor Mount - Bottom.stl
DC Motor Mount - Bottom.stl
DC Motor Mount.stl
DC Motor Mount.stl

Re: Slitting on a Unimat SL? #db200

 

I've always wondered if one of the small carbide tipped trim saw blades, from a Big Box Store, could be used as a slitting saw blade in non-ferrous metals?? Some of these blades leave a fairly thin kerf.? Alright, maybe NOT on a Unimat, but something a little heftier?

I've seen several you-tubers use standard carbide router bits to mill non-ferrous metals, even some mild steel using light cuts.? (If it's on the Interwebb it's gotta be good - right?)? Other than the fact that the blades would be 3"-4" of whirling-whizzing death, why wouldn't it work?? Even a small slitting saw will do plenty of personal damage if you get careless.

Don
Re: Slitting on a Unimat SL? #db200

 

Bill, if you are needing a mount like mine, for a DC motor and without the idler shaft clamp, I will happily share my .STL file with you.

I will definitely be investing in slitting saws, just need to figure out what would be best for the little Unimat SL Mill setup. In the meantime, I'll take a few shaves with my band saw.

For 3D design, once you get going you won't be able to stop designing and printing. Sometimes I just print little templates and jigs. For example, the DC motor has 3 holes, 120 degrees apart. While I could lay it out by hand, I'll design a little template with the 3 holes, and a center extrusion to self center on the big hole in the mount.?

I highly recommend Fusion 360 - there is a free version, Mac or PC, which will do everything you want. A learning curve, for sure, but there are? gazillions of how-to videos online. I stick to some basic primatives, every now and then I get to learn some new tricks.
Re: Slitting on a Unimat SL? #db200

 

If you make up or buy some indicator holders, you can do a bit better than eyeballing, though it is a bit more difficult on the Unimats. Something like Harvey's vertical lead screw, or there are others on the group.?/g/Unimat/album?id=195752?is the one I found first. I believe this is a little earlier model:?/g/Unimat/album?id=195774

But as Guy said, you could use a hacksaw, too! Some folks want to make stuff for their tools, some folks want to use the tools, and some folk like to do both...?

Bill in OKC


William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 10:32:36 AM CDT, Steve Johnson <steve@...> wrote:


Thanks Bill, that makes sense. So then vertical mill mode, vise on the cross sled. I guess the hard part is getting the piece clamped level and eyeballing the height of the slitting blade.

Re: Slitting on a Unimat SL? #db200

 

That's CHEATING!!? :)?

Can also use a jeweler's saw, or coping saw. Particularly in aluminum alloys. Back in the days when they were still inventing all the machine tools, much of the work for making the prototypes was done with hammers and chisels, files and hacksaws, and other hand tools. If you're only going to do one of these plates, one time, a hacksaw would be fine, and maybe a thin, fine-toothed file to smooth the cut edges. I have plans to make two of them, and know I'll want to have slitting saws for other purposes, so unless I get in a hurry, I'll be doing the slitting saw things.?

Years ago, I bought an Atlas MF horizontal milling machine. It was in a box and 57 baggies, but some of the baggies held tooling, including an assortment of slitting saw blades. I'll be needing to make at least one arbor, and probably several... YMMV of course!

I bought a slab of 1/2"x 4"x14" aluminum plate to make mine out of. Have the stuff here to build a furnace, and even some experience making very simple patterns and ramming up the molds, but haven't gotten that round tuit yet, either! ;) Also have a 3D printers sitting here quietly oxidizing waiting for me to learn how to make my own 3D drawings on the computer, but I have recently downloaded a bunch of stl files for stuff for my Atlas lathe, and a few for my Unimat. No motor mounts for the SL or DB that I've found yet, but I've only looked at Thingiverse, so far.?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 10:29:06 AM CDT, Guy Winton <kooldude@...> wrote:


Back in the stone age, some folks would place 2 hacksaw blades, side by side, on a hacksaw frame and just manually saw the slot.


-Guy-?

On April 19, 2023 at 10:52 AM Steve Johnson <steve@...> wrote:

I am casting a new motor mount for an SL Unimat. I'll be using green sand, cope/drag, and as such I will have to cast it with the slot/slit(?) on the clamp side filled in. I'm at a loss trying to figure out the best way to cut this back in after casting. Band saw? Too thin. Table saw? Too thick. Unimat? I don't know where to begin.

So this is what the original motor mount looks like:


This is the printed 'positive', and is what the aluminum casting will look like:


Thoughts?


?
Re: Dead Center stuck in tailstock ram.

 

I believe the tailstock ram is hollow and threaded for the ram screw.?
Re: Slitting on a Unimat SL? #db200

 

Wow Kevin, that thing cuts like butter!! I have a Delta 10" in my main shop and will be getting a Rikon 10" for my new "micro" shop. Would that same 1/8 x 14tpi blade be good for small detail wood work, like 1/8 plywood, etc??
Re: Dead Center stuck in tailstock ram.

 

Quick freeze, freeze spray, or canned air turned upside down will work in a pinch, as will liquid butane sprayed on it, (fire hazard).

I always have a can of quick freeze laying around, as I worked in electrronics.? ?

pat??
Re: Slitting on a Unimat SL? #db200

Kevin Groenke @ PersonMakeObject
 

I just cut mine from plate?on my bandsaw with a 1/8 x 14tpi blade. If the gap is insufficient to pinch the flange, just make a second cut or get in there with a file or abrasives.


Best Regards,
Kevin from PersonMakeObject

??????



On Wed, Apr 19, 2023 at 9:52?AM Steve Johnson <steve@...> wrote:
I am casting a new motor mount for an SL Unimat. I'll be using green sand, cope/drag, and as such I will have to cast it with the slot/slit(?) on the clamp side filled in. I'm at a loss trying to figure out the best way to cut this back in after casting. Band saw? Too thin. Table saw? Too thick. Unimat? I don't know where to begin.

So this is what the original motor mount looks like:


This is the printed 'positive', and is what the aluminum casting will look like:


Thoughts?

Re: Slitting on a Unimat SL? #db200

 

It's aluminum. A bandsaw looks like the obvious solution to me. If the blade kerf is not enough, just pare one side (or both) wider.

Michael
Re: Slitting on a Unimat SL? #db200

 

Thanks Bill, that makes sense. So then vertical mill mode, vise on the cross sled. I guess the hard part is getting the piece clamped level and eyeballing the height of the slitting blade.
Re: Slitting on a Unimat SL? #db200

 

Back in the stone age, some folks would place 2 hacksaw blades, side by side, on a hacksaw frame and just manually saw the slot.


-Guy-?

On April 19, 2023 at 10:52 AM Steve Johnson <steve@...> wrote:

I am casting a new motor mount for an SL Unimat. I'll be using green sand, cope/drag, and as such I will have to cast it with the slot/slit(?) on the clamp side filled in. I'm at a loss trying to figure out the best way to cut this back in after casting. Band saw? Too thin. Table saw? Too thick. Unimat? I don't know where to begin.

So this is what the original motor mount looks like:


This is the printed 'positive', and is what the aluminum casting will look like:


Thoughts?


?
Re: Slitting on a Unimat SL? #db200

 

They normally use something called a slitting saw.??is a short (6min) video on the basics of using a slitting saw. There are quite a few folks who use them, and Quinn at Blonidihacks demonstrates making your own slitting saw arbor:?

Both of these folks have larger machines, but the principles are the same. Just smaller! ;)?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Wednesday, April 19, 2023 at 09:52:35 AM CDT, Steve Johnson <steve@...> wrote:


I am casting a new motor mount for an SL Unimat. I'll be using green sand, cope/drag, and as such I will have to cast it with the slot/slit(?) on the clamp side filled in. I'm at a loss trying to figure out the best way to cut this back in after casting. Band saw? Too thin. Table saw? Too thick. Unimat? I don't know where to begin.

So this is what the original motor mount looks like:


This is the printed 'positive', and is what the aluminum casting will look like:


Thoughts?

Slitting on a Unimat SL? #db200

 

I am casting a new motor mount for an SL Unimat. I'll be using green sand, cope/drag, and as such I will have to cast it with the slot/slit(?) on the clamp side filled in. I'm at a loss trying to figure out the best way to cut this back in after casting. Band saw? Too thin. Table saw? Too thick. Unimat? I don't know where to begin.

So this is what the original motor mount looks like:


This is the printed 'positive', and is what the aluminum casting will look like:


Thoughts?
Re: Unimat black crackle jig-saw

 

Did any one repaint a black crackle?

And how did it looks like?

I'm planning to do some repainting with black crackle (or wrinkle)
Re: Unimat black crackle jig-saw

 

¿ªÔÆÌåÓý

Unlike the hammered ¡®stuff¡¯, good news is that this is an easy one to match. I just brought the same piece off my MK2 as shown in your photo to a local Paint shop (in my case ?one catering to the trade but any place who color matches and mixes should be fine). They measured the color and mixed up a batch for me that I could pick up the following day.

?

Friendly regards,

Alan

?

From: [email protected] <[email protected]> On Behalf Of John Hutnick
Sent: Wednesday, April 5, 2023 4:14 PM
To: Steve Jaynes <srjaynes@...>; [email protected]
Subject: Re: [Unimat] Unimat black crackle jig-saw

?

Re the comments from Mr. Jaynes, here is a piece from Ebay showing Unimat gray.
Does anyone have this color???

Re: Groups.io Problem

 

Fred,
Your sign in works for me. I will be using the complete address from now on.
Thanks
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
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Re: Groups.io Problem

 

This is what my shortcut points to, works great:

/g/Unimat/topics
Re: Groups.io Problem

 

Bill,
I have always typed ¡°groups.io¡±with no issues. As of three days ago this no longer works for me. Apparently I have have been getting away with doing it this way but no longer works.
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
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