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Re: Marlin v1 issues MANUAL_Z_HOME_POS

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Dannydefe
@ jaguarking11
I believe the numbers are correct because when I request a movement in Z, I measure it with my calipers and it is correct.

I did use this formula ( [calculator.josefprusa.cz] ) and it verifies I have the correct steps.

Well I see this line.

#define DEFAULT_AXIS_STEPS_PER_UNIT {80, 80, 80, 439.5}

Change it to

#define DEFAULT_AXIS_STEPS_PER_UNIT {88.889, 88.889, 88.889, 439.5}

This is assuming your running a GT2 belt with 18 Teeth. This would account for about a 8% difference in height. This takes into assumption two things here. One: your using GT2 belts, and your motors are 1.8 degree motors with full on 1/16 microstepping.

The formula is simple [www.reprap.org]

steps_per_mm = (motor_steps_per_rev * driver_microstep) / (belt_pitch * pulley_number_of_teeth)

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