Does anyone know how to set up steps per unit in marlin configuration.h for 3d printer?
I'm doing calibration for the x-axis stepper motor but having problems setting the correct steps/mm.
I'm Using
marlin 1.8.13
RAMP 1.4
Arduino Mega 2560
DRV8825 (set to 0.85V with all 3 jumpers)
stepper motor (1.7A, 1.8 degrees, 200 turns/rev)
M8 Leadscrew, pitch 1.25mm/rev
base on the prusaprinters calculator (https://blog.prusaprinters.org/calculator_3416/)
I suppose to change it to
#define DEFAULT_AXIS_STEPS_PER_UNIT {2560, 2560, 2560, 190 }
but here is the thing, my motor stops turning with a high pitch noise, and drv8825 extremely hot when it goes higher than 400 steps/mm. I assume it is too fast for it to spine since when I set it to 80 steps/mm it moves very slow.
when I input
#define DEFAULT_AXIS_STEPS_PER_UNIT {160, 160, 160, 190 }
x-axis only moves 20mm when I set to move 100mm in pronterface.
I change it base on the formula (desired length / actual length * current steps per unit), which I got (100/20160=800 steps/mm) it is still too much for the motor to function properly.
below are my current settings
#define DEFAULT_AXIS_STEPS_PER_UNIT { 160, 160, 160, 190 }
/
* Default Max Feed Rate (mm/s)
* Override with M203
X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
*/
#define DEFAULT_MAX_FEEDRATE { 300, 300, 5, 25 }
/**
* Default Max Acceleration (change/s) change = mm/s
* (Maximum start speed for accelerated moves)
* Override with M201
X, Y, Z, E0 [, E1[, E2[, E3[, E4]]]]
*/
#define DEFAULT_MAX_ACCELERATION { 3000, 3000, 100, 10000 }
extruder E0 works fine, very precise.
Any suggestions? Really appreciate :)
