|That doesn't look right... |
The Leadscrew is supposed to be connected to the stepper.
I had guestimated the problem to be that the Cap screw that held the leadscrew to the motor coupler had come off. That was incorrect. The Spectralight mill differs from the stock Sherline 5400 mill. Instead of having a hard mount for the steppers to the lead screw it uses a coupling that permits small amounts of misalignment.
|The motor coupler.. (Half of it.)|