stepper motor stalling in x axis only problem

[alex850]

i am haveing problems with a drillingcode moveing in the x axis. it is stalling , wineing, and lossing position before going to the 3rd line of code. the motors are nema 42 and  motor ouput is identical settings. the screen in mach shows the program to move correctly and the code is fine. when i uncheck the backlash compensation box it works fine. but then the profile program does not profile the part correctly. there is nothing wrong mechanical in the mill that i can see. any help would be great.
thanks alex

[monty62]

i seem to have the same problem do you have a solution
regards les