"James Sweet" bravely wrote to "All" (08 Oct 05 02:36:26)
--- on the heady topic of " Repairng Proprietary FDS Floppy Drive. Quick
Disk drive"

JS From: "James Sweet"
JS Xref: core-easynews sci.electronics.repair:344432

JS "Franc Zabkar" wrote in message
JS ...

As for adjusting the speed,
if you know the target RPM, and if it is a multiple of your mains
frequency, then it should be a simple matter to design a paper strobe
disc that you could attach to the drive motor and watch under a
fluorescent light.


JS Neon glow lamp works much better.


A small panel light (#47 etc) with a rectifier diode in series is fine
too. Just take into account that the flicker rate will be 60Hz with
this but it will be 120Hz with the neon. I guess one could always put
a rectifier in series with the neon.

A*s*i*m*o*v

.... Electrical Engineers do it with more frequency and less resistance.