CAD CAM EDM DRO - Yahoo Group Archive

Re: Re: Re: Polar Coordinates CNC?

Posted by IMService
on 2002-11-04 06:17:20 UTC
> Date: Mon, 4 Nov 2002 06:30:22 -0600
> From: Ray Henry <rehenry@...>
>Subject: Re: Re: Polar Coordinates CNC?


>Well, yea. I can see the device but it seems to me that by the time you
>build C with center bearings, drive, and some sort of support for
>cutting forces around the outside of the suggested 4' diameter you'd have
>more work into it than a conventional mill and all to save two slides, a
>ball screw, and their supports.

A turntable with skate wheels around the OD sitting on a 1/4 thick, flat
rolled sheet would probably be flat enough for most CNC router work.
They usually are happy with a 6 inch Z travel. Remember the X is fixed
and technically it only has to go to the center. 2 feet of precision guide
ways to support an axis that in all other designs requires 4 feet plus
another 4 feet of support on each side. This is a major reduction in
complexity with very little loss of resolution, repeatability, or massiveness.

>I did recently see a mega lathe with a C axis on the flat like this. The
>turntable (spindle) had to be 10 - 12 feet across.

My interest was actually sparked in making a small bench top machine.
I'm thinking 12x12 inches rectangle (on the turntable), maybe less. 6
inch Z height. Rack and pinion on the X and Z w/B-W skate wheel guides,
and a large spur gear and pinion w/ motor mounted vertically, underneath
the turntable. disk overhang protects the moving parts from dust and swarf.
Angle Iron/channel frame. Might be a kick-butt kind of kit or entry level
machine with a router motor installed.

Best Regards, Fred Smith- IMService

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Discussion Thread

Ken Jenkins 2002-11-03 08:43:30 UTC Re: Polar Coordinates CNC? wenger2k 2002-11-03 10:46:36 UTC Re: Polar Coordinates CNC? Fred Smith 2002-11-03 11:28:42 UTC Re: Polar Coordinates CNC? alenz2002 2002-11-03 12:52:57 UTC Re: Polar Coordinates CNC? Alan Marconett KM6VV 2002-11-03 15:58:20 UTC Re: Polar Coordinates CNC? Ray Henry 2002-11-03 17:38:09 UTC Re: Re: Polar Coordinates CNC? Fred Smith 2002-11-03 18:06:36 UTC Re: Polar Coordinates CNC? Ray Henry 2002-11-04 04:40:06 UTC Re: Re: Polar Coordinates CNC? IMService 2002-11-04 06:17:20 UTC Re: Re: Re: Polar Coordinates CNC? allan_reinhard 2002-11-04 11:06:09 UTC Re: Polar Coordinates CNC? Ray Henry 2002-11-04 18:58:47 UTC Re: Re: Re: Re: Polar Coordinates CNC? Raymond Heckert 2002-11-04 19:15:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Polar Coordinates CNC? bjammin@i... 2002-11-05 05:06:55 UTC Re: [CAD_CAM_EDM_DRO] Re: Polar Coordinates CNC? Ray Henry 2002-11-05 09:21:37 UTC Re: Re: Re: Polar Coordinates CNC? Dan Mauch 2002-11-05 10:16:58 UTC DRO Boards bjammin@i... 2002-11-05 14:39:00 UTC Re: [CAD_CAM_EDM_DRO] Re: Re: Re: Polar Coordinates CNC? macfool68 2002-11-12 16:45:59 UTC Re: DRO Boards Van Der Sandt Coert 2002-11-12 23:05:20 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Dan Mauch 2002-11-13 06:38:47 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards macfool68 2002-11-13 06:52:17 UTC Re: DRO Boards Dan Mauch 2002-11-13 07:14:42 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Dan Mauch 2002-11-13 07:28:16 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Tim Goldstein 2002-11-13 09:11:12 UTC Re: [CAD_CAM_EDM_DRO] Re: DRO Boards j.guenther 2002-11-13 09:22:49 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards aussiedude 2002-11-13 09:29:31 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Dan Mauch 2002-11-13 10:31:44 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Dan Mauch 2002-11-14 12:56:05 UTC RE: [CAD_CAM_EDM_DRO] Re: DRO Boards Peter Homann 2002-11-17 16:59:38 UTC Running Unipolar steppers with a Bi-polar driver? turbulatordude 2002-11-17 17:27:23 UTC Re: Running Unipolar steppers with a Bi-polar driver? jeffalanp 2002-11-17 20:56:41 UTC Re: Running Unipolar steppers with a Bi-polar driver? Tim Goldstein 2002-11-17 22:59:27 UTC RE: [CAD_CAM_EDM_DRO] Re: Running Unipolar steppers with a Bi-polar driver? Jon Elson 2002-11-18 08:09:41 UTC Re: [CAD_CAM_EDM_DRO] Re: Running Unipolar steppers with a Bi-polar driver? jeffalanp 2002-11-18 09:40:29 UTC Re: Running Unipolar steppers with a Bi-polar driver? Tim Goldstein 2002-11-18 10:35:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Running Unipolar steppers with a Bi-polar driver? mariss92705 2002-11-18 17:07:08 UTC Re: Running Unipolar steppers with a Bi-polar driver? jeffalanp 2002-11-18 21:56:32 UTC Re: Running Unipolar steppers with a Bi-polar driver? mariss92705 2002-11-19 10:59:15 UTC Re: Running Unipolar steppers with a Bi-polar driver? jeffalanp 2002-11-20 22:40:35 UTC Re: Running Unipolar steppers with a Bi-polar driver?