i am currently converting a K40 to a SKR V1.3 so that I can work with Lightburn. In the meantime, a smoothie firmware is initially running on the board without a machine. I put fire and PWM on outputs with LEDs so that I can watch what happens. During my test I noticed:
- If the axes are not moving then fire and PWM are off
- When I move by hand, fire is off but PWM is on
- When a contour is followed, fire is always on and PWM is switched off on the empty paths.
Is that normal?
I had actually thought that PWM is always on and fire only comes on when an element is cut.