CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table

Posted by sam sokolik
on 2003-08-31 22:27:26 UTC
did it.
This was really to test some steppers
http://www.electronicsam.com/video/VIDEO1.mpeg
http://www.electronicsam.com/video/VIDEO2.mpeg
http://www.electronicsam.com/video/VIDEO3.mpeg
http://www.electronicsam.com/video/VIDEO4.mpeg
they are 800 and some in-oz - a little overkill. It was just cobbled togather as a proof of design. It has .020 of back lash which turbocnc worked with quite nicely.
These videos have been posted a few times by me. most people will reconize them.
I milled some 2 inch metal washers with it as well as milling some small signs. Hobby equipment has come a long way sense I had tried to do this 3 years ago.


Chuck Knight <chuckknight@...> wrote:


Well, today there was one of those neat tool sales they hold out in
rural area. Homier is a popular company for these, though today's was
Cummins Tools.

While I was there, I found a fun little toy. Its castings are a bit
rough, but it's a cross-slide drill press vise, essentially a 4x6 inch
X-Y table with a vise on top. Needless to say, my mind immediately
turned to its possibilities as a low cost CNC platform. And, for
$19.99, I couldn't turn it down! It should make a good complement to my
much larger (but potentially less accurate) wood router. Large wooden
parts, small but accurate metal parts? I could make almost anything! ;-)

Yes, you read it right, $19.99 is its full retail price! Dovetail
slides, and a built in facility for shimming it to minimize play...not
too shabby for the price. It seems reasonably well designed.

http://www.cumminstools.com/browse.cfm/4,92.htm

Well, like I said, it's a bit rough in person, but it has potential.
Acme lead screws and nuts, too -- but unfortunately there's some
backlash in the system. Enough that I want to do something about it.
So, here's my question.

Is it possible to modify *existing* nuts to display less backlash?
Perhaps by injecting some sort of polymer into them, or something? You
see, the nuts are part of the casting, as far as I can tell, so there's
no way to remove, modify, or replace them. And, since it's almost
definitely of Chinese origin, the ACME lead scrws are probably of metric
size, which is even harder to find here in the States. I'd rather use
the existing stuff, and just "improve" it, if it's at all possible.
Since it's got such limited travel, as is, I'd like to avoid *adding*
another nut, for example...that would cut down on the capacity of the
table, though that might be the easiest way to make the modification.

Anyone have any good ideas?

-- Chuck Knight



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Discussion Thread

Chuck Knight 2003-08-31 00:31:52 UTC Modifying an X-Y table Peter L. Peres 2003-08-31 14:20:34 UTC Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table Chuck Knight 2003-08-31 19:26:13 UTC Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table Jeff Demand 2003-08-31 19:53:42 UTC Re: Modifying an X-Y table sam sokolik 2003-08-31 20:10:22 UTC Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table ccq@x... 2003-08-31 21:48:16 UTC Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table Chuck Knight 2003-08-31 21:54:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table sam sokolik 2003-08-31 22:27:26 UTC Re: [CAD_CAM_EDM_DRO] Modifying an X-Y table grantfair2001 2003-08-31 23:34:50 UTC Re: Modifying an X-Y table Robb Greathouse 2003-09-01 13:32:49 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table ballendo 2003-09-02 04:50:02 UTC Re: Modifying an X-Y table turbulatordude 2003-09-02 07:50:34 UTC Re: Modifying an X-Y table - ACME Chuck Knight 2003-09-02 19:16:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME turbulatordude 2003-09-02 20:37:48 UTC Re: Modifying an X-Y table - ACME - for fun and learning JanRwl@A... 2003-09-02 20:43:38 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning m0nkey0ne 2003-09-03 01:26:21 UTC Re: Modifying an X-Y table - ACME - for fun and learning turbulatordude 2003-09-03 06:57:50 UTC Re: Modifying an X-Y table - ACME - EPOXY Peter L. Peres 2003-09-03 07:39:15 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table ccq@x... 2003-09-03 10:10:15 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - EPOXY Chris Baugher 2003-09-03 11:27:07 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - EPOXY Chuck Knight 2003-09-03 16:28:58 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - EPOXY ballendo 2003-09-04 03:56:10 UTC Re: Modifying an X-Y table - ACME - for fun and learning ballendo 2003-09-04 04:01:45 UTC Re: Modifying an X-Y table turbulatordude 2003-09-04 06:11:52 UTC Re: Modifying an X-Y table - ACME - for fun and learning Chuck Knight 2003-09-04 10:14:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning sam sokolik 2003-09-04 10:36:39 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning turbulatordude 2003-09-04 16:17:44 UTC Re: Modifying an X-Y table - ACME - for fun and learning Tim Goldstein 2003-09-04 16:36:03 UTC RE: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning JanRwl@A... 2003-09-04 20:57:03 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning Chuck Knight 2003-09-04 22:50:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning JanRwl@A... 2003-09-05 13:11:16 UTC Re: [CAD_CAM_EDM_DRO] Re: Modifying an X-Y table - ACME - for fun and learning