Hello, Im having some problems with getting the A
axis on EMC working. Primarily following errors, but
there also appears to be a discrepancy in units
between the stepconfig wizard, (degrees/second) vs.
EMC (degrees/minute), and deceleration at the end of a
move.
Im using a 200 step stepper motor. The drive is
microstepping at 25 pulses/step which equates to
13.8888889 pulses/degree.
Using the stepconfig wizard, the motor will operate
reliably with speeds to 2400 deg/sec and the
acceleration at 24000 deg/sec^2. 2400 deg/sec should
equate to 144000 deg/min.
Using EMC, any speed above 25700 deg/min will cause
intermittent following errors, and any speed above
26100 deg/min will always cause a following error. I
am testing this by entering G code G1FxxxxxA360 to do
one complete turn, or G1FxxxxxA0 to return to the
starting point. I upgraded to 2.2.3 yesterday, it
didnt seem to make any difference in operation.
Ive also noticed that a move in a positive direction,
either from 0 to 360 deg or -360 to 0 deg, at the end
of the move the motor will always overshoot. It
doesnt appear to be ramping speed down, it just stops
sending steps. In the negative direction, it works
correctly ramping speed down to the stop.
Any ideas?
Thanks,
Fred
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