TwoTrees Rotary Roller Setup / Y-Axis

Does your controller board have 2 Yaxis connectors on it? And you plugged the rotary into the second Yaxis socket? This has to be true to power both at the same time.

That second Yaxis connection is for machines that have a stepper motor on each end of the gantry. It is not meant, nor set up for, using a rotary and a Yaxis at the same time. You must unplug the Yaxis motor plug to use the rotary.

If you Google it, you can find Y/Rotary switches. The intent is to save wear and tear on the connectors. For those that could not find a switch that works for them, they resort to making their own, like I did.