I noticed each time I pushed autofocus, the bed would go down instead of up toward the pen. Turns out the nib on the pen was getting stuck due to dust build up, so it thought it was depressed. Make sure you clean the nib if it has dust on it and make sure it doesn’t get stuck in the pen otherwise the autofocus will think it is touching the surface already, so it would just move to the distance offset making the bed go down each time you pushed autofocus.
This is a great point to consider. I would have missed this.
I’ll get this into the training info and discuss if this should remain in the ‘Compatibility’ section.
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