Sony TC-134SD Motor-Flywheel Alignment

Sony TC-134SD
Motor-Flywheel Alignment

The flat belt that is used on this model of the TC-134SD had a tendency to 'ride up' the flywheel, and would sometimes jump off during start-up.

The solution to this was to align both motor and flywheel axes to compliment each other so that the belt would remain stable and close to the centre of the flywheel.

In an ideal setup, both axes should be parallel. Unfortunately on this TC-134SD they weren't, although the error was minute.

Objective: The objective was to permanently set the angle of the motor so that the belt remained close to the centres of both motor pulley and the capstan's flywheel when running.

To achieve this I had to disassemble the motor from the deck and eventually insert a folded piece of card at the base, specifically at one side of the motor. This allowed the two axes to compliment each other and permit stable belt engagement between the motor and flywheel.   

In theory the two axes should be parallel - although camera lens
distortion in this picture gives the impression they are not.

I suspect they are still minutely out-of-parallel?

Note: The belt is seated close to the centres of
both motor pulley and capstan flywheel.

Operation is now very stable, even on start-up!

The arrow marks the area where a small piece
of folded card is used to tilt the motor.

All mechanics running smoothly.

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