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400 k drive missing felt


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#1 bibilit

bibilit
  • 68000
  • LocationParis area -FRANCE-

Posted 21 April 2017 - 11:39 AM

I have been trying to repair a 400 k floppy drive.

 

Was stuck hard in the first place and managed to get  the carrier free, in order to have a nice insert and eject process.

 

Problem is, i spotted the small upper pressure felt was missing, so in operation the unprotected plastic is scratching the upper part disk.

 

The drive is not working, can ear the floppy acting, but the floppy will not find the system.

 

Anybody has found a way to replace this felt pad, and can be this missing part responsible for the drive not locating the information on the disk ? 

 

 


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#2 BadGoldEagle

BadGoldEagle
  • 68000

Posted 21 April 2017 - 03:09 PM

As I'm sure you already guessed, the pressure pad applies pressure to the disk. If uneven pressure is applied then it will definitely have read issues. On a good, working drive, the disk will wobble a bit with the pad lifted and it won't work properly. The felt needs to be in place to get the right balance. I know that because I misplaced the felt when I relubed my drives... They didn't work until I put the damn thing back in.

 

As for getting a new felt in there, you could try to get a hold of new audio cassette felt on ebay. I've seen a couple for sale there. Can't find any right now but it looks like this.

 

Don't you have another 400k drive lying around whose felt you could borrow for an experiment? I mean why bother trying to replace a felt on a completely dead drive...? I have one here, if you want I could drop by your place and we could give it a try...


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#3 bibilit

bibilit
  • 68000
  • LocationParis area -FRANCE-

Posted 22 April 2017 - 06:39 AM

maybe found a solution, will try first.


Macintosh Classic and II ,CC, SE, SE/30,IIsi 25mhz(RasterOps video),Q 700,LC, LC III,LC475, PBook Wallstreet/Bronze/5300cs/1400c/100/Tibook Imac G3 slot-in, Bondi and G4 / PMac G4 sawtooth, QS, MDD, Yikes!, Cube, Imac Core 2 Duo, Ibook G3 (white/clam) G4 + Newton 120, eMate 300,Quicktake 150,  PowerCD


#4 bibilit

bibilit
  • 68000
  • LocationParis area -FRANCE-

Posted 24 April 2017 - 09:11 AM

drive was given back to the owner, but was thinking can the felt of an Apple II Disk be a suitable spare ?


Macintosh Classic and II ,CC, SE, SE/30,IIsi 25mhz(RasterOps video),Q 700,LC, LC III,LC475, PBook Wallstreet/Bronze/5300cs/1400c/100/Tibook Imac G3 slot-in, Bondi and G4 / PMac G4 sawtooth, QS, MDD, Yikes!, Cube, Imac Core 2 Duo, Ibook G3 (white/clam) G4 + Newton 120, eMate 300,Quicktake 150,  PowerCD


#5 jsarchibald

jsarchibald
  • 68000
  • LocationGold Coast, Queensland, Australia

Posted 25 April 2017 - 11:20 PM

It's not the felt that I am having trouble with, it's the small plastic part that attaches to the felt pad, that then is located in the spring-loaded arm.  There has to be a fix that will be permanent, has happened on 3 of my 400K drives.


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