Vibrations and malfunctions of X-axis motors

Troubleshooting
#1

Hi all,

Can someone help us? We are makers in France

We mounted a Farmbot Genesis 1.4 last June. It worked well but with some loss of steps in X. Then after a few weeks of non-use, we end up with stepping motors completely crazy.

We have problems with stepper motors for the X axis. They do not react normally with a lot of vibrations, jerky movements and without regularities.
We sought solutions. We changed the speed = no improvement. We connected a stepper motor on another card = always vibrations. There are always jerky and irregular movements.

Without encoders there are always lost steps. With encoders it’s worse than before.
When I remove the belts I always see imperfections. Without encoders the movement is more fluid but there is a slight bug at the start. With encoders, the movement is completely jerky.

We tested with stepper motors coming from a Farmbot Genesis 1.3 belonging to a French maker (bought 2 years ago) and we noticed the same problems.

Any ideas ?

#2

Did you try to swap the stepper driver between the axes? Also check the reference voltage of the driver output. Here are additional information: Why is my FarmBot not moving?

#3

Thanks. We will try this and come back later.

#4

This sounds strangely famililar. See problem description here. The solution in our case was to reflash the arduino firmware.
Martin

#5

Please review this video from Bob DuBard:

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