Re: HP-65 card motor screws Message #11 Posted by Kees Bouw on 1 Nov 2011, 3:09 p.m., in response to message #10 by Raymond Del Tondo
Quote:
It's Not the Position of the screw as such, but the movement space at the ends of the motor axis. If the screws are too tight, the pressure against the ball bearing on the external side of the axis may be too high, and thus the motor movement is out of tolerance.
Thank you for your response. That really helps to understand the problem. I wonder how it was done in the factory, and in repair shops at the time. There must be people still around who worked there and know exactly how it is supposed to be done! What also puzzles me is that no-one has ever seen a HP-65 Service Manual. Did it not exist, is it very rare, was it impossible to scan into a pdf document, what is going on with this. For most other calculators there is a Service Manual, so why not for the HP-65?
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