was the Y over or under by that amount?
I'd assume it is potentially some backlash in there that is being effected by the larger mass of the bed.
are you sure they have used the same number toothed pulley for X and Y?
steps_per_mm = (motor_steps_per_rev * driver_microstep) / (belt_pitch * pulley_number_of_teeth)
[reprap.org]
I'd assume it is potentially some backlash in there that is being effected by the larger mass of the bed.
are you sure they have used the same number toothed pulley for X and Y?
steps_per_mm = (motor_steps_per_rev * driver_microstep) / (belt_pitch * pulley_number_of_teeth)
[reprap.org]