I've thought about trying the following in EMC2. Set up the stepper axis with encoder feedback. Have the step rate be the commanded step rate + proportional to error. Have a following error shut the system down if error is greater than maybe 10 steps. If the axis is stalled, the error should grow greater than 10 steps real fast, if not it should be able to make up lost steps. The idea I was interested in was to use linear scales from a DRO for actual position feedback. This could get you to position with or without lead screw errors, step errors, etc. It wouldn't prevent stalling an axis but at least detecting the following error could shut down before ruining the part. (assuming it stalled out on a roughing cut that can be cleaned up on a finishing cut, and didn't gouge)
RogerN ----- Original Message ----- From: "Roger" <vrsculp...@hotmail.com> To: <emc-users@lists.sourceforge.net> Sent: Sunday, January 04, 2009 9:07 AM Subject: Re: [Emc-users] A wish - Closed Loop Steppers Snip > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
