hi everyone,

a few days ago i added planetary gear reductions to my Y-axis (the axis has 2 motors, one on each side).
it's a 5/1 ratio and the machine runs smoother with it, and if a can get it to work correctly i'll do the X-axis as well.

after i put the gear reduction in, i calibrated the axis again in the settings page in mach3.
when i jog the y-axis with the steps per value mach3 gave, the whole bridge of the table twists, like 1 motor is running faster than the other one.
if i lower the steps per value (from 153 to 100) the problem goes away and the machine runs smooth and straight.
the y-axis before the gear reduction had drivers that were set to 25000 pulses/rev.
when i placed the reductions i changed those to 1600 pulses/rev.
also mach3 kernel speed is set to 100KHZ.

this seem a problem in the settings for the drivers and mach3 right?
no mechanical problem i would think?

anyone any idea what the issue could be?