> On Wed, Dec 20, 2017 at 2:46 PM, Pete Rittwage <peter@rittwage.com> wrote: >>> Hi all, >>> is it just me or there isn't a clear way to check and adjust the >>> spindle speed on an internal drive of the 128D? >>> The drive is still quite marginal but I can't find any way to either >>> check or adjust the spindle speed which should be 300 rpm as always. >>> Thanks >>> Frank >> >> No, there is no way to adjust speed on that mechanism. > > ok, the drive operation is too marginal, a very few medium ever start > to format, almost noone goes past track 20, most stop at track 10-14, > so if it's not the disk speed, what else might be? Sometimes the drive > reads/write normally, but it's really too random... > > I'm out of ideas Most of the time, the issue with those is the top head does not apply proper or even pressure for the bottom head to read. If it sits open/unlocked for years and years, the little metal ribbon bends/warps and causes this. I would carefully check that first. http://personalpages.tds.net/~rcarlsen/cbm/1571/1571diag.txt -- Pete Rittwage C64 Preservation Project Message was sent through the cbm-hackers mailing listReceived on 2017-12-20 15:01:43
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