Bill, your comment got me thinking about something else. Measuring the total current of the mount would make sense if the EQ6 was using DC motors but it does not, it uses stepper motors.
The current through a stepper motor is set by the driver and it is constant, no matter if the stepper is rotating or not. More importantly, the current does not depend on the load, unlike in the DC motors.
So... even if there is an extra load on the worm or even if the worm binds there should be no change in the total current drawn by the stepper motors. Again, these are not DC motors.
