Since the control box has been apparently ruled out as the problem, the circuitry on the underside of the turntable becomes the primary suspect.
isn't the detector in the bridge, along with the connections between it and the control circuit?
greg - Philadelphia & Reading / Reading
gregc Since the control box has been apparently ruled out as the problem, the circuitry on the underside of the turntable becomes the primary suspect. not sure how you can rule out the emitter (LED), detector, connections isn't the detector in the bridge, along with the connections between it and the control circuit?
not sure how you can rule out the emitter (LED), detector, connections
I'm just suggesting that the signal is either not being sent or the circuitry on the underside of the turntable is not communicatting the signal to the bridge. For whatever the reason, the turntable is fully rotating 360 degrees without sensing the zero point (home position) and stopping.
Rich
Alton Junction
my understanding is the bridge can easily be removed and inspected. has it been inspected?
there's a comment in the instructions about adjusting the wipers. some of the wipers may be for the detector/emitter in the bridge
Be gentle when cleaning the wipers and avoid pushing them down. They should always be slightly raised in a flat row.
If adjustment is needed, gently lift the wiper/s upward until it aligns with the others.
if the other TT bridge is the same model, can it be swapped?
There isn't a second turntable bridge I just have a second controller to operate the turntable. I don't want to dig too deeply into the bridge in case Walthers wants me to send it back for replacement at this point. I looked at taking the motor cover off when I was cleaning and lubing the other day and the slotted wheel for the pulse generator is right over one of the cover screws. I know from experience in the industrial sector getting those out of alignment is a huge pain, but if I break it now it would be on my dime! I will wait a little more until I hear back from Walthers. I agree, the signal is basically getting lost somewhere since I am sending a request for a signal when trying to find home position and never getting it, just not sure where!
Good Luck, Morpar
MorparI don't want to dig too deeply into the bridge in case Walthers wants me to send it back for replacement at this point.
The bridge simply lifts up and straight out of the center pivot hole in the turntable.