Bosch Table saw

[joalmorris]

Thanks so much for the quick reply, Tinkerdave. When you say "control module" if you are talking about item #12 "speed control" on page B above, that is what I replaced. I bough if from this web site. I am absolutely certain I wired it correctly. More details: A piece of wood got crooked and bound up for less than a second before I threw the switch off. I've have much worse binds than this on other saws with no problems. But when I pulled the wood out and turned the saw back on, the saw did as I described: It turns backward for an inch and stops. A current-hum sound comes out of the the motor but I don't let that go for more than a half second before flipping the switch off. If I grab the blade and spin it forward as hard as I can and then flip the switch on, it will turn very slowly for several revolutions and sort of clatter until it stops. Those are all the details I can think of. Thanks in advance for any advice.

[Tinkerdave]

Hi Joalmorris, based on what you tell me I can't think what else it could be.I've had a number of saws that have come into the shop most have had something like that happen to them. The saw will run in reverse,the saw will run at a high rpm,or run and chatter like your explaining. I still believe you got a bad speed control. The control unit does a number of things 1. it controls the speed brake. 2. It is a RPM limiter.3.It controls the soft start. It sounds like the controller is stuck in soft start and brake at the same time.The only other thing that could cause this is if the brake lead from the field is broken so the controller is not getting a signal from the field and thats whats causing it to be wonky.