General Category > Lisa Troubleshooting and Repair
Rear drive head pad has become dislodged. Any repair tips?
stepleton:
I'm not certain whether it was possible to save a workspace in Lisa Smalltalk, but if it was, the workspace on your Smalltalk twiggy could differ from the one on Bitsavers.
ried:
Felt arrived today. I am pleased to report that I did not break anything (as far as I can tell). It's F1 industrial felt with adhesive backing. Using the leather punch it became clear that 4.5mm diameter is the correct size. James' tip about un-clipping the alien from the underside makes it very easy to do.
A few pictures of the dirty old head pressure pads and the newly-made replacements below. The original head pads are not quite as tall, a bit more compressed in their appearance. But I'm certain that the replacement pads will settle down to an almost indistinguishable height after they've had some pressure applied for a while.
Re-installed the drive and it works! Thoroughly cleaned the heads "while I was in there." 8)
sigma7:
--- Quote from: ried on August 15, 2025, 08:46:14 pm ---Re-installed the drive and it works!
--- End quote ---
Nice work; you're quickly becoming a Twiggy expert!
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