Fasten a pointer to the leadscrew and align it with a marker then move the axis and the pointer should be back in line when you go back to the start point.
In most cases its rapid moves that cause the loss of position, try increasing the acceleration time and reducing the velocity a small amount.
Graham
Wondered about this one too. I suppose this would be different if you are looking at pulses/linear movement distance vs lost steps.
I would think that once your axes calibration is setup correctly and any backlash has been accounted for you could run a test of several itreations of back and forth motion and see where the pointer lands. I'm not sure that you would/could call that "lost steps" or actually determine whether you do in fact have everything setup correctly.
Could you use a dial test indicator and quantify the amount moved based on the number of pulses sent? Does Mach have a means of showing the count of pulses sent that could be "zeroed" before hand and then make your move and see where you land with the actual DTI reading vs the expected DTI reading?
Sorry offhand I don't remember. Would be a nice feature though.
Vogavt