AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

Chuck Guzis cclist at sydex.com
Wed Mar 27 16:07:25 CDT 2019


On 3/27/19 1:36 PM, dwight via cctalk wrote:
> Most all 8 inch drives were synchronous capacitive phased AC motors. That is until 3 phase low voltage motors started showing up on 5.25 disk drives.
> The ac motors on the 8 inch drives rarely had jumper options for 120/240V AC. Most were fixed voltage and cycles. I can't recall any that I've seen that had a voltage option.
> Dwight

I picked up a new Qume 842 for 220V 50 Hz and simply substituted a
flanged timing pulley for the crowned one, adjusted for the frequency
variation.   I powered it from the power supply transformer primaries
hooked as an autotransformer to give 240VAC.   Worked just fine.

--Chuck



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