Hi everyone, 

I'm actually working on controlling a stepper motor with the motion control tool to make a positioning stopper. This is the first therefore the program is quite simple and only uses the mc_power and mc_moverelative functions. 

The program works as expected but everytime the operator wants to move the stopper by a certain distance, a 1.25 coefficient appears between the distance to travel and the distance really travelled. 

I have checked all the parameters of the TO_axis i configured and the driver. They are both set on 6400 impulsions per motor rotation, the linear distance per rotation is fine as well and we are not using any multiplier or anything with the motor. 

Does anyone here have an idea about the 1.25 coefficient and where it could actually come from ? Do you think it could be related to the velocity profile i've configured ?
 

Thanks !