M2 RevE Z stepper steps per mm
Posted: Tue Nov 30, 2021 12:42 am
So I am trying to get my M2 changed over to a Duet 32 bit main board. I am not going to call this an upgrade because it has been a real pain in the butt so far.
Does anyone know the number of steps per mm for the Z stepper motor and the pitch of the lead screw.
The wiki has the following info
The Z motor is a standard, 1.8°/step stepper motor, with an integral, four start 8mm pitch leadscrew with a metric trapezoidal thread. Four start means that there are four individual threads along the length of the leadscrew; 8mm pitch means that the center to center distance of the thread is 8mm (or, in our application, that a nut mounted on the leadscrew will be driven 8mm for one full rotation of the leadscrew). So 200 full steps = 3200 microsteps = 8mm. The firmware uses values of [micro]steps/mm, so the firmware value is 3200 / 8 = 400 steps/mm.
Which does NOT match what is in the firmware
#define DEFAULT_AXIS_STEPS_PER_UNIT {88.88,88.88,1007.7,471.5} // default steps per unit for Ultimaker //v000 9/24/2015
When I use 400 in the Reprap config the z axis only travels about half way up from home. I assume the black Z motor has a different number of steps per revolution?
1007.7 seems like a very odd number and using it the bed still comes up short at 200mm
Any help is greatly appreciated
..
Does anyone know the number of steps per mm for the Z stepper motor and the pitch of the lead screw.
The wiki has the following info
The Z motor is a standard, 1.8°/step stepper motor, with an integral, four start 8mm pitch leadscrew with a metric trapezoidal thread. Four start means that there are four individual threads along the length of the leadscrew; 8mm pitch means that the center to center distance of the thread is 8mm (or, in our application, that a nut mounted on the leadscrew will be driven 8mm for one full rotation of the leadscrew). So 200 full steps = 3200 microsteps = 8mm. The firmware uses values of [micro]steps/mm, so the firmware value is 3200 / 8 = 400 steps/mm.
Which does NOT match what is in the firmware
#define DEFAULT_AXIS_STEPS_PER_UNIT {88.88,88.88,1007.7,471.5} // default steps per unit for Ultimaker //v000 9/24/2015
When I use 400 in the Reprap config the z axis only travels about half way up from home. I assume the black Z motor has a different number of steps per revolution?
1007.7 seems like a very odd number and using it the bed still comes up short at 200mm
Any help is greatly appreciated
..