Really. This is the response you got from Customer Service.
This RPS Error has got to be in the speed sensor.
•The speed sensor is located under the black plastic cowling on the motor.
•It could also be caused by a break in the wire or plug going from the speed sensor in the motor to the power supply.
•Ask him to look closely at these areas.
•If he does not see a break in the wires then replace the speed sensor.
•The procedure for removing the cowling and replacing the speed sensor is on WIKI.
•If he sees a break in the wire from the power supply to the plug going to the speed sensor, then replace the power supply again.
Surely there was more.
You did receive a document that details the procedure for removal and replacement of the speed sensor. Surely you did.
I assume the reference to WIKI means WIKI.com. I searched there, though I am not very good at this sort of detective work, and did not find a Shopsmith procedure.
"Making Sawdust Safely"
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