Hi Peter
I assume that should read Z travel of 373mm? If Z commands are not moving the carriages the correct amount you have an incorrect steps per mm value in your firmware for X, Y and Z. The value is derived from the steps per revolution of your motor, normally 200, the microstep value you have set on your controller, normally 1/16, the number of teeth on your pulleys and the tooth pitch of your belts.
(Stepper Motor Steps x Micro Steps) / (Pulley Teeth x Belt Pitch)
So for normal steppers and GT2 belt with 20 tooth pulleys
(200 x 16) / (20 x 2) = 80 steps/mm
Andy
I assume that should read Z travel of 373mm? If Z commands are not moving the carriages the correct amount you have an incorrect steps per mm value in your firmware for X, Y and Z. The value is derived from the steps per revolution of your motor, normally 200, the microstep value you have set on your controller, normally 1/16, the number of teeth on your pulleys and the tooth pitch of your belts.
(Stepper Motor Steps x Micro Steps) / (Pulley Teeth x Belt Pitch)
So for normal steppers and GT2 belt with 20 tooth pulleys
(200 x 16) / (20 x 2) = 80 steps/mm
Andy