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HP97 Card Reader adjustment - Printable Version

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HP97 Card Reader adjustment - Ed Sowell - 09-26-2010

Just getting back to this project after several months. I've now rebuilt the "clutch" using silicone adhesive and the traction wheel with fuel hose. It now reads a test program quietly, whereas before with original clutch and O-ring traction wheel it was noisy. Progress! But, the motor still turns off before card is fully ejected. No ERROR report, just stops prematurely so I have to tug it out.

The question is how to fix this. I've been looking at the test & adjustment procedure in the Service Manual which looks thorough but tedious. I'm willing to give it a go, but though I'd first ask if anyone here has used it with success. Or, is there a simpler way?

If I am to use the Sm test/adjust procedure I will need the test data cards. Since it writes OK I guess I could just create the one that is supposed to have data on it, but I'm wondering if it wouldn't be better to use a card created on a faultless card reader. Also, where does one get the magnetic powder referred to in the procedure?