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

[dwight]

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-bounces at classiccmp.org> on behalf of Chuck Guzis via cctalk <cctalk at 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