Recently I have been trying to get a rebuilt Prusa running at 24V. The setup is Ramps with Pololu drivers and Repetier firmware, similar to 12V systems that I have built, however, it suffers badly from missed steps.
I have done 5 or 6 builds/rebuilds of similar systems and am quite familar with the hardware and firmware problems which may cause missed steps, but none of the adjustments/settings seem to cure this. Unusually, more speed (in g code) seems to give less missed steps. There also seems to be no sounds from the motors during the fraction of a second where it misses steps.
I was wondering if the fast rise time of current to the motor coils with 24V needs any adjustment in the Repetier firmware. In particular I notice in Configuration.h the following, none of which I understand.
RAMP_ACCELERATION
STEPPER_HIGH_DELAY
STEP_DOUBLER_FREQUENCY
ALLOW_QUADSTEPPING
DOUBLE_STEP_DELAY
MAX_HALFSTEP_INTERVAL
I have tried much lower speeed, acceleration and jerk settings without solving this, but could any of the above come into play here?
Thanks,
Mike