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1985-04-19
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The following was recently seen on Ward Christensen's personal
bulletin board system (312-849-1132) and is relayed here for its
informational value.
--Keith
From: Ward Christensen
To: All
Re: Squealing diskettes solved
A month or so back I solicited opinions on squealing diskettes.
Yesterday I solved it with a replace of the PRESSURE PAD on the
Shugart 801 drives. I also WD-40'd the stepper lead screw, and now
seeking is as smooth as velvet, IN SPITE of maintenance people's
advice to leave it "dry" so it doesn't attract dust.
From: Gary Elfring
To: Ward Christensen
Re: WD-40 and Shugart
I have lubricated my lead screws for a number of years. One of my
drives started acting up and I noticed that it was very hard to manually
move the lead screw. I cleaned the screw completely with a freon based
solvent and then lubricated with a light machine oil. This speeded up
disk access significantly! Anyway, the choice of lubricant makes a BIG
difference. After about 6 months I had to go clean and relubricate the
screw. It got all gummed up. This time I used a silicon based spray
product. That attracted less dirt and lasts about a year. Cleaning
and spraying once a year doesn't bother me much. It also a good idea
to check the pressure pads at least once a year. As they wear out
the disk reads and writes become less reliable.