27 Mar
2019
27 Mar
'19
4:06 p.m.
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