Z-axis stepper current - Plus vs MK2
Comparing latest firmware between Plus and MK2 versions...
Plus:
#define DEFAULT_PWM_MOTOR_CURRENT {270, 450, 450} // {XY,Z,E}
MK2:
#define DEFAULT_PWM_MOTOR_CURRENT {270, 830, 450} // {XY,Z,E}
It seems that MK2 requires twice as much current as its predecessor.
Why is that?
Different stepper? Leadscrew instead of threaded rod? Heavier x-axis ?
Re: Z-axis stepper current - Plus vs MK2
Lazaros
Yes, it has a thread that is 10 times as coarse (8mm pitch as opposed to 0.8mm on the Mk1).
But worry not! The current passed to the motor is still less than half that which it can handle. Yes, the motors are on all the while the printer is turned on and yes, they do get a tad warm, but it's not a problem.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Z-axis stepper current - Plus vs MK2
Thanks Peter.
I was just comparing the code (thinking of a few mods including the leadscrew) and this together with accel rate
was...odd... 😎
Re: Z-axis stepper current - Plus vs MK2
The acceleration rate in the firmware is a default and way too high for normal use.
This is apparently corrected within Slic3r, but in other slicers, you may need the following line in start GCode:
M201 X1000 Y1000 E600 ; set default acceleration
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…