Post your xml file and someone will have a look at your settings.
I have not used backlash in long time because I got rid of it on all my machines. Worth the time and effort!
I strongly recommend you do the same.
The 50-50-50 rule which you may want to consider is as follows:
50% - The max velocity is 50% of where your steppers will start to skip
50% - Set the shuttle Wheel setting in configuration to .0050 to .050 ( .5 too slow )
50% - Backlash speed
The Shuttle Wheel Accel is in seconds. How exactly is the" time" applied to the backlash "cycle"? Well I don't really know.
It's internal to Mach. By observing the difference in how the motor reacts to different settings you will see that it affects the overall time it takes for Mach to take up the backlash and at say a value of 5 you will find that over five seconds the handwheel / shaft will turn rather slowly. At 0.005 sec its almost instantaneous. In the real slow setting, and say you jog a distance of .1" you will find there
seems to be almost 3 distinct motor responses in the cycle,....... a small rotation then deceleration...... then backlash taken up
over a time...and then accel and move to finish the distance.
So to get of flavor of it you need to start slow, observe, listen to see what is happening over an operating range.
Work your way up in settings.
RICH