John Kasunich wrote: > Chris Radek wrote: > >> On Tue, Aug 07, 2007 at 06:47:59PM +0100, Richard Arthur wrote: >> >>> Just playing, but I notice that reversing the sign of the Min_Limit and >>> Max_Limit reverse the direction of travel when jogging (2.1.7). Is that >>> expected behaviour? >>> >> Interesting, I doubt that's intended. The correct way to invert an >> axis's travel is to negate the scale. >> >> It is a misconfiguration (possibly an undetected one) if the min limit >> is larger than the max limit. >> > > I agree with Chris - having a "min" limit that is higher than your "max" > limit is simply bad configuration. EMC should probably complain about > that. > Yes, certainly bad configuration. I had unintentionally set the sign wrong, but was surprised at the change of direction nevertheless. I was pondering whether anything bad could arise from that. I guess not, unless you happened to have your jog rate set high. > Regarding the jog reversal: I bet it reverses only continuous jogs (the > normal "jog while the key is pressed" jogs), but not incremental jogs. > Correct. > That is because continuous jogs are implemented as "jog toward the > respective limit, and stop when the key is released". If the limit > is on the wrong end of the axis, it will jog the wrong way. > > I bet you haven't homed your machine yet. Correct. In fact you can't home, it will head off in the wrong direction and hit the hard limit. > With the limits backwards, > your machine will always be outside of the limits, since you can't be > above min and below max if max is less than min. Prior to homing soft > limits are disabled, but as soon as you home the machine and the limits > are activated, you will get a soft limit error. > > Fix your limit values ;-) > No problem, just playing ;-) > Regards, > > John Kasunich > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > >
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