Odd floppy drives (was: Orbis

[Chuck Guzis]

On 9/25/2005 at 7:35 AM Nico de Jong wrote:

>Yeah, this "feature" has given me quite some headaches.
>I use the TEAC FD-235 as the standard in my conversions systems. From new,
>there
>were no problems reading PC and AS/400 disks on the same drive, but
>suddenly it
>could stop reading PC or AS/400 disks.
>At last, we found out that the error always occurred on drives assembled or
>Malaysia or whereever, while the Japanese drives never had that error. A
>closer
>inspection showed that the malayan motor was to blame, as it couldnt keep
>up
>with the speed changes

I just keep a couple of 235HF's around--one is jumpered to always do 360 rpm and the other isn't. :)  I used to think that the HG's were magic, but pretty much the same motor control circuitry is present in both types.  So, to get 360 rpm, just remove the 0-ohm resistor at W4 and ground the side that isn't connected to +5.

Cheers,
Chuck