Calibration of 8" floppy drive?

Dan K 100dashsix at
Fri Feb 5 23:46:33 CST 2016

Are there any good alternative solutions I can do to replace it? I'm
sure I don't want the plastic touching the disk media.


On 2/5/16, Jon Elson <elson at> wrote:
> On 02/05/2016 08:02 PM, Dan K wrote:
>> Another great tip. This plagued me for a long time, until
>> I realized that I had only one drive connected, and it had
>> the resistor network IC unpopulated. I borrowed it from
>> the other drive (they were on the same wire, so I suppose
>> that only one resistor network is necessary) and that's
>> what led to my initial success.
> Yes, the terminating resistor pack should only be in the
> last drive on the cable.
>> It seems to do the job, but I still don't have a
>> replacement pad. That seems to be okay however, because on
>> one drive the head load solenoid doesn't appear to come
>> down far enough to push the disk very much. I don't think
>> I've ever seen the pad on either drive come down enough to
>> physically touch the disk--maybe just brushing it, barely.
>> What might cause this?
> Probably wear, or maybe warpage of the parts over time.  The
> pressure pad should be fairly soft, usually a felt-like
> material. It needs to push the media into contact with the
> read-write head. Without it, you will occasionally get good
> enough contact to read a sector header or even a whole
> sector, but it won't be consistent. The data will come and
> go as the disk rotates.
> Jon

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