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I'm sure it was your fault. No way, not theirs.Like buying a bicycle, assembled from Wally World, has a tag on it to check all nuts and bolts. WTF am I paying for assembly then.
I guess a resolvers must somehow be different than an encoder then. An encoder only knows it's position within one rotation. The controller keeps track of the number of rotations. When the controller is rebooted, it loses that. So it touches off the limit switch then backs up until it hits the zero degree position of the encoder. I forget what it is actually called. Since the limit switches are not consistent in the point they release, if that zero position is too close to where it hits the limit switch, sometimes the machine will be off one rotation which is .200 in our case. Rotating the encoders mount to get zero away from the limit switch fixes that.