Shopsmith Forums

1.5 seconds is good news! Not long enough to cause damage. The motor 'start' circuit consists of three things. 1) the start windings. 2) the start capacitor 3) the start switch. Those three things are connected in series(daisy chained) The motor 'run' windings are directly connected to the external...

JPG- you're right, the motor did not jerk but simply stopped after a very brief attempt at rotation and then continued to hum until I opened the switch (~1.5 seconds).

Cheers,

Dave

The differing resistance was likely due to belt deformation(they had taken a 'set'). If the motor was not humming loudly when it 'stopped', it likely had a sudden power interruption. I would check the switch and wiring (electrical continuity). An ohmmeter would be helpful! Finally verify the bearin...

How did you ascertain a defective motor by rotating the saw blade and how did you 'confirm' that? The damage done to the speed control is typically mashing of the teeth on the quadrant gear(porkchop) and deformation of quadrant gear pivot legs.(fixable) The later induction motor is 1 1/8 HP and is ...

I haven't had to do any serious work on my headstock (that is, the motor, belts, speed control, etc.), but I recommend that you check out this web site: https://jacobs-repairshop.com. Jacob Anderson rebuilds headstocks and sells this service and a few service items on this web site. But he also has...

It's now June in Texas and my chickens are laying hard boiled eggs

Dave Barnett here in Hutto, Texas. Although I've been aware of ShopSmith for years I am just now a first time owner having picked up a Mk5 (ser# 328507, 1956 year of manufacture) at an estate sale last week for a "pig in a poke" price. On my initial removal of the headstock covers it is fa...