LisaList2

General Category => LisaList2 => Lisa Troubleshooting and Repair => Topic started by: bmwcyclist on September 15, 2026, 07:17:17 AM

Title: 400k floppy drive seeking
Post by: bmwcyclist on September 15, 2026, 07:17:17 AM
I've finally got around to looking at my 400 K floppy. I've pulled out the eject mechanism fully cleaned it and lubricated it.

I plugged it into my FPGA and it doesn't like my floppy.

 When I go to format it, it doesn't look like it's seeking correctly. The stepper motor doesn't seem to go all the way to the top of the access window. Am I seeing this wrong?

Title: Re: 400k floppy drive seeking
Post by: sigma7 on September 15, 2026, 03:21:39 PM
Quote from: bmwcyclist on Yesterday at 07:17:17 AMit doesn't look like it's seeking correctly. The stepper motor doesn't seem to go all the way

I recently had 400K drive trouble... worked fine for a while then something similar, wouldn't step properly in some places.

Cleaning & relubricating the lead screw fixed it.
Title: Re: 400k floppy drive seeking
Post by: bmwcyclist on September 15, 2026, 04:20:40 PM
Quote from: sigma7 on Yesterday at 03:21:39 PM
Quote from: bmwcyclist on Yesterday at 07:17:17 AMit doesn't look like it's seeking correctly. The stepper motor doesn't seem to go all the way

I recently had 400K drive trouble... worked fine for a while then something similar, wouldn't step properly in some places.

Cleaning & relubricating the lead screw fixed it.

Thanks! I put some "super lube" on it but did not clean or run it back and forth by hand.


I'll give that a try.