BTW Kevin I almost had to beg you for help -- my working Beverly Hillbillies focuser suddenly began to act bizarrely. The motor would buzz but not move, or move a little bit slowly and then back the other way, or refuse to do anything at all. I thought it was a loose pulley, then maybe a wrecked gearbox in the motor, then a software problem. I even ordered a second motor to check (I needed one anyway). Then I thought to eliminate all the intermediate cabling and connectors and wire the motor straight onto the HAT terminals. Worked like a charm. Must've been a loose connection, I have an RJ-11 breakout board with screw-clamp terminals at either end and a phone cord between them. One of the wires in the clamps must have come a bit loose.

Noting here just in case somebody else runs into a similar problem.

Read More...