CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew

Posted by Jon Elson
on 2000-12-01 15:03:13 UTC
Greg Nuspel wrote:

> What if you used a servo motor on the fine feed wheel input, but ran a cable
> to a clamp on the quill. This cable then runs over a drum attached to an
> encoder. Now you have no backlash in your system.

Yes, you still have backlash! The encoder (discounting vibration of
the cable, nonlinearities in the wrap of cable on the drum, etc.) will
read true position, but the motor will have to rapidly jump from one end
of the considerable backlash to the other, causing a big bump every
time it gets to the other side. It will just bash back and forth .050"
all the time, knocking the quill up and down a few thousandths and then
reversing. This kind of mechanism will be a terrible pain to make work
at all.

Jon

Discussion Thread

Jon Anderson 2000-11-30 17:09:26 UTC Looking for short ballscrew Hugh Currin 2000-12-01 08:11:24 UTC Re: Looking for short ballscrew Wally K 2000-12-01 08:46:02 UTC Re: Looking for short ballscrew for Z axis Jon Anderson 2000-12-01 09:11:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Anderson 2000-12-01 09:14:59 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew for Z axis ptengin@a... 2000-12-01 09:40:51 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Anderson 2000-12-01 09:58:34 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Smoke 2000-12-01 10:17:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew William Scalione 2000-12-01 10:26:08 UTC Re: Looking for short ballscrew Jon Anderson 2000-12-01 10:36:22 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Anderson 2000-12-01 10:42:41 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Smoke 2000-12-01 11:06:17 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew PMeinhard@a... 2000-12-01 11:49:09 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Elson 2000-12-01 12:02:51 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Greg Nuspel 2000-12-01 12:08:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Anderson 2000-12-01 13:30:14 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Smoke 2000-12-01 13:34:58 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Greg Nuspel 2000-12-01 14:00:54 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Smoke 2000-12-01 14:43:40 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Elson 2000-12-01 15:03:13 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Greg Nuspel 2000-12-01 16:05:09 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Anderson 2000-12-01 16:39:05 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Elson 2000-12-01 22:58:13 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Elson 2000-12-01 23:18:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew dave engvall 2000-12-03 22:37:07 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Smoke 2000-12-03 23:01:39 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Carey L. Culpepper 2000-12-05 09:25:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew ptengin@a... 2000-12-05 10:54:15 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Carey L. Culpepper 2000-12-05 11:11:52 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Jon Elson 2000-12-05 11:44:24 UTC Re: [CAD_CAM_EDM_DRO] Re: Looking for short ballscrew Bill Griffin 2000-12-05 22:31:15 UTC Re: Re: Looking for short ballscrew ptengin@a... 2000-12-06 00:45:04 UTC Re: [CAD_CAM_EDM_DRO] Re: Re: Looking for short ballscrew