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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. |
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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! 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.
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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! 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:
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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??
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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. |
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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.
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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:
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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! 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? |
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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? |
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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/ ?SMALL TURRET TOOL POST PLANS? ?LARGE TURRET TOOL POST PLANS ?MINI- ?SMALL QC TOOL POST PLANS? ?QUICK CHANGE LATHE TURRET ?MINI LATHE COMPOUND PIVOT MODIFICATION |
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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/ ?SMALL TURRET TOOL POST PLANS? ?LARGE TURRET TOOL POST PLANS ?MINI- ?SMALL QC TOOL POST PLANS? ?QUICK CHANGE LATHE TURRET ?MINI LATHE COMPOUND PIVOT MODIFICATION |
Steve Johnson
Bill in OKC too
Ruben
OldToolmaker