Pan or tilt problems continue after changing sensors and driver PCB

Symptoms/Issue

Pan or tilt problems after changing sensors and driver PCB.

Description/Explanation of Issue

Pan or tilt errors can continue after changing driver PCB and sensors if the pinion gear set screws are slipping.

Fix/Solution

1. Access pinion gear by removing the yoke arm covers.
2. The pinion gear is the small gear that is attached to the pan and tilt motor.
3. Ensure that two of the three set screws are aligned with the flat parts of the motor shaft (see example pictures below)
4. Tighten all set screws and test.
5.