br549 wrote:Thanks for posting the video ... while I don't have a definite possible cause or solution, I'm sure someone else will. My only guess at this stage would be dry bearing(s) or sheaves needing more oil.
Yeah I have had the dust cover off a long time now trying to solve all the problems. So it very well may need that oil again.
br549 wrote:The button bearing on the end of the control sheave needs to move freely. With the Shopsmith in drill press position, have you lubed the hole in control sheave shaft well, and let the Shopsmith remain in vertical position overnight to let oil run down to the button bearing?
The floating sheave (at the motor) might also need lubing again. With power OFF and UNPLUGGED, you should be able to pry the floating sheave apart from it's mate by hand and compress the large spring while doing so. A sluggish floating sheave will contribute to hard turning of the speed control knob towards "SLOW".problem.
I have oiled that part, but that wasn't how the Saw Dust video went. Now I have better info to oil it again and do that instead.
br549 wrote:As far as speed control action, it is normal for it to move easier towards "FAST" than towards "SLOW". When moving to "SLOW", I grasp the entire speed control dial (like a peanut butter jar lid) and dial it back slowly ... using the small protruding handle alone makes it even harder to turn.
That is reassuring. And after I oil everything it may not have to work so hard.
br549 wrote:One other observation: In you video, the Poly-V belt does not appear centered, which I believe it should be.
Good catch! I'll fix that ASAP.
br549 wrote:Aside from the ground wire being loose, did you remove the motor from the headstock and open it up to blow out dust? Or did just removing the screws that held motor pan to motor somehow get past the humming but not starting problem? I am no electrical wizard, but I would not think a loose ground wire would alone have been the reason for the humming but not starting problem.
I didn't remove the motor from the headstock, after I got all the screws out I saw the dust. I blew that out, and then saw the wire. So it may well have been the dust that was the issue like you said. It had more in it than I would have expected.
I have a few more good steps to take now.