Brushless DC Motor control through Macros

SANJR

Hi Everyone,

This thread is in continuation with an earlier thread https://forum.duet3d.com/topic/34670/connecting-a-bldc-controller-to-duet-mainboard-6hc.

Completed the Wiring and configuring a BLDC motor with a driver. Facing a issue on ON and OFF the motor operation through duet. Wiring and configuration files are shown below. Not sure of what the problem is? Any inputs and suggestions would be much appreciated

The motor operates well when controlled though a BLD750 driver

BLDC 750.png

config.g
;fans
M950 P5 C¨out5¨ Q250  ; Allocate GPIO port 5 to OUT_5 (fan output), 250Hz
M106 P5 S255

DC Motor ON @50% Speed
M42 P5 S0.5     ; Set 50% PWM on GPIO port 5

DC Motor OFF 
M42 P5 S0     ; Set 50% PWM on GPIO port 5

o_lampe

@SANJR You are still running it at 250Hz? Q3000 would be best, according to the driver-datasheet
I'm also not sure if the definition as a fan is the right way? (M106 is fan control), but later you're using M42, which is simple GPIO control.
Is it possible to mix these?

SANJR

@o_lampe

Thanks for the feedback

Removed the M106 code and changed the Q value to 3000.
Using the macros with M42 CODE now and increased the S parameter value to 255.

The issue persists.