M542 driver - motor vibration at low speeds

[routercnc]

Hi Birchy,

Not tried it myself as don't have the noise problem you are experiencing but others have tried adding inertia to the stepper via flywheels etc. and achieved a much smoother low speed running. If you have a shaft from the rear of the stepper you can add one there, or otherwise bolt it to the front face of the pulley (tap holes in pulley face).

Solving Stepper Motor Resonance Problem on CNC Lathe - YouTube

I would suggest adding the lowest inertia possible to just remove the problem, otherwise acceleration of the stepper will suffer too much. The one in the video looks a bit big - you could do some calcs, or just try something to at least see if that would help before refining the flywheel design iteratively.

[birchy]

What about maximum velocity, Jonathon? Is 50 too high? Too low? Or somewhere near?

Interesting use of the counterweight there. I was thinking that I need to add a wheel of some sort so I can manually turn the motor if one of the E-Stop limit switches is activated. Two birds, one stone...

[birchy]

Just typed "stepper resonance" into Youtube and came up with this. Interesting that they have an almost identical machine to mine (looks like the Amadeal version) and to quote "I was so FED UP of stepper motor resonance". So he fitted Servo motors instead. Seems a bit OTT though.