On Sun, 05 May 2013 09:14:48 -0500, you wrote:
>I had that problem on my Hardinge CHNC, the position would creep after >rapiding back and forth a few times. DRO reading was proper but >diameters would change. The X axis encoder coupler was slipping >slightly, why it only slipped one way is still a mystery but thats what >it was. Seen a similar situation on a heds encoder on a Z axis recently. As the job progressed the Z axis would creep up. That machine was running Gecko 320X's - Gecko recommend 1uF caps across the 5V supply at the encoder end. It had caps but I never checked the value initially. Turns out they were 0.1uF. Replacing them with 1uF fixed it. It was totally repeatable.0.27mm upwards over 280mm in 10 iterations. Totally counter intuitive. It was over running upwards against the weight of the motor and axis. BUT - 70mm off in one direction change only is weird! Steve Blackmore -- ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
