On 06/20/2017 07:13 AM, Todd Zuercher wrote:
I wish that were true. For some reason my analog servo machine trips up and
sets a following error on an axis about 25% of the time when trying to home to
index for the first time after turning on LInuxcnc. (Almost every time since it
is a 4 axis machine.) But the alarm is easily cleared, and it always homes
fine the 2nd try. I have never been able to figure out why, and no one else
seems to have been able to replicate the problem.
You should be able to track signals such as encoder position
and INDEX_ENABLE with Halscope and capture the events when
this happens. Homing does cause a discontinuity in the PID,
which is only masked on following error and P. The PID
output gets a bit of a bump due to the D term. Since it is
usually moving quite slowly during the final home to index
move, that shouldn't be enough to trip errors. You could
try lowing the final move and see if that helps. I
occasionally get a servo amp fault just as the index is
detected for this reason. Pretty rare, so I have ignored it.
Jon
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
