Stepper Motor Hell

Hello everybody,

I am having a really hard time trying to make my stepper motors to work ...
What i am using:
- ramps 1.4
- A4988 stepper motor driver
- 200 steps motor (17HSR1006-25)
- marlin 1.0.2-1

I tried a lot of things ... Checking the motors wires, playing with the micro-stepping, the driver calibration, acceleration constant definition, the feedrate ... but I can't get a reliable and smooth movement.

Most of the time, all i am getting is this something like this type of "vibration" [vid.me] (slower or faster, depending of the feedrate I use with the 'move' command, stronger or weaker depending of the driver calibration).

Any idea, tips or link concerning this subject would be highly appreciated.

Have you set/checked/tweaked the driver reference voltage?

- Tim

Thanks you Tim for your answer.

Yes, I tried to adjust this parameter. I started at first with a 0.8 V potential, and tried to lower and increase it. The only effects I can see, are a stronger vibration (louder noise, more 'torque') and more heat from the motor and the driver.

If the driver reference voltage it too low, i get a light buzz, and no more movement from the motor.

If all the motors are doing the same thing and they vibrate instead of move, then the wiring of the motor cables may be wrong for the electronics. I had this problem with a new set of cables from Robotdigg a few weeks ago. The fix was to swap over the outer 2 wires where they go into the connector that plugs into the electronics. You need a very small screwdriver or fine tweezers to lift the plastic tabs on the connector shell so that you can pull the pins out.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].