Linear rail axis vibrates a lot with duet 2 wifi (v1.04)

johny

Hello,
I am building a printer with linear rails and duet wifi.
I am using 2A motors (17HS16-2004S1).
When configuring i setup the current for 950ma and X16 micro stepping with interpolation and the axis vibrates a lot; if i increase the current the vibration rises when I start to lower the current the vibration is reduced. Only at 500 ma, the vibration gets into a point that is acceptable. should i be using 80% of the motor current like 1600ma? what am i doing wrong?
Thank you

johny

Just a small note, i am using 12V PSU.
Thank you

dc42

Does this vibration happen when you command movement around a particular speed? If so, my guess is that you are hitting a resonance at that speed, either mid-band resonance of the motor, or resonance of the frame.

If it's only only one of the motors causing vibration, that can be caused by a partially-failed stepper driver.

Another possible cause is trying to move the motors too fast for the supply voltage. As you are using 1.8deg motors, I don't think this is very likely; but you should check whether the supply voltage is adequate for that speed using the motor EMF calculator at https://www.reprapfirmware.org/.

I suggest you run those motors at between 1.3A and 1.6A.

johny

@dc42 said in Linear rail axis vibrates a lot with duet 2 wifi (v1.04):

adequate

Hello, Vibration happen when i move the axis in the dashboard buttons i guess standard speed. I already changed the stepper (plugged on a different) and changed motors as well; i can only reduce the noise when i change 906 to 500ma

johny

The noise using 1250 ma
In the end i loose the belts the the noise is reduced

dc42

@johny said in Linear rail axis vibrates a lot with duet 2 wifi (v1.04):

The noise using 1250 ma
In the end i loose the belts the the noise is reduced

Sounds like a resonance then.

johny

Hello,
It was a small gap in the linear rails that made the resonance! changed the rails and no noise!
Thank you