A friend an I did almost the same thing. We used the transformer primary from another box as an auto transformer and used a file to grind the motor pulley down. We did have to file the mounting slots some as well. It worked fine. This was about 25 years ago. Dwight
________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Chuck Guzis via cctalk <cctalk@classiccmp.org> Sent: Wednesday, March 27, 2019 2:07 PM To: dwight via cctalk Subject: Re: AW: 50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B 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
