Re: [Emc-users] Z-Axis Drifting Problem

2008-05-17 Thread Glenn R. Edwards
: Saturday, May 17, 2008 3:17 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Z-Axis Drifting Problem On Sat, May 17, 2008 at 02:33:04PM -0500, Ray Henry wrote: > I can't see how electrical interference would cause bad counting in > one direction only but you might make c

Re: [Emc-users] Z-Axis Drifting Problem

2008-05-17 Thread Jeff Epler
On Sat, May 17, 2008 at 02:33:04PM -0500, Ray Henry wrote: > I can't see how electrical interference would cause bad counting in one > direction only but you might make certain your encoder cables are > grounded at the drive end only. I agree this sounds a bit strange, but I've seen this on two oc

Re: [Emc-users] Z-Axis Drifting Problem

2008-05-17 Thread Ray Henry
Hi Nasir Good to hear from you again. You started using EMC a long time ago. Six+ years ago at least. Does it do the same sort of sliding down when the moves are fast as opposed to slow? Is it possible that you have mechanical slip between the axis and the feedback. If this is a motor with

[Emc-users] Z-Axis Drifting Problem

2008-05-17 Thread nasir ahmed
Dear All, We have installed Motenc-Lite on two milling machines. X and Y axis on both machines show good repeatability and show no errors after long run. Z-axis shifts conitinously by repeated motion of 100mm for 400 times, the error shifts the Z-axis approximmately 1.00mm into the