512ke Floppy Drive Auto-Eject Issues

Discussion in 'Apple Collectors' started by Gamer9430, Jan 19, 2015.

  1. Gamer9430, Jan 19, 2015
    Last edited: Jan 23, 2015

    Gamer9430 macrumors 68020

    Gamer9430

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    Apr 22, 2014
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    Central New Jersey, USA
    #1
    i am now a proud owner of a 512ke. I got the computer, keyboard, mouse, Mac 'n Freeze fan, IBM Color Jetprinter, Microsoft MacEnhancer, original carrying case, and several cases of disks for $120 from a nice guy on Craigslist. Anyway, the floppy drive reads and writes disks fine, however, it does not eject the disks automatically, I have to use a paper clip to remove the disk. It auto ejected for a few hours yesterday, then I heard it making different noises than usual while ejecting and then it died again. Any suggestions on how to get it working. I'm nervous about working inside the computer because of the risk of shock from the CRT. Any suggestions would be greatly appreciated!
     
  2. MacTech68 macrumors 68000

    MacTech68

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    Location:
    Australia, Perth
    #2
    Firstly, I recommend doing a google search for:

    macintosh_128k.512k.pdf

    Next, have a look at this thread for information about reconditioning your drive:

    http://forums.macrumors.com/showthread.php?t=1354182

    Note, the above thread applies to 800K and early 1.44MB drives. If you indeed have a 512ke, you should have the 800K drive.

    Those should give you all you need - further questions can be added to the above thread.

    Enjoy! :)
     
  3. miniMOJOman macrumors newbie

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    Jan 17, 2015
    #3
  4. MacTech68 macrumors 68000

    MacTech68

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    #4
    Already added to the thread that was linked. :)
     
  5. Gamer9430 thread starter macrumors 68020

    Gamer9430

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    #5
    Thanks to both of you, and this is what is happening now. The drive was working, and then it stopped, and yesterday the motor started running, but nothing was actually happening, so I definitely thought the gear teeth might have broke off. Is there any easy way to fix that?
     
  6. Gamer9430 thread starter macrumors 68020

    Gamer9430

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    #6
    Ok so I was looking through the MR post from MacTech68 and I saw how to get to it, and how to order those gears. Shapeway is offline today (1-21-15) so I will have to order the parts at a different time, if that is what broke. If someone could link a disassembly guide for the floppy drive, that would be great. Again, as I mentioned in my original post, I'm a little nervous working inside around the CRT.
     
  7. MacTech68 macrumors 68000

    MacTech68

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    #7
    Check the first post in the thread I linked to. There is a link there to basic info on how to pull the drive apart. The rest of the thread gives additional detail for other points to attend to.

    Thus:

    http://68kmla.org/wiki/Floppy_Drive_Lubrication

    and

    http://forums.macrumors.com/showthread.php?t=1354182
     
  8. Gamer9430 thread starter macrumors 68020

    Gamer9430

    Joined:
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    #8
    Thanks, I can't seem to find instructions just to get it out of the computer anywhere though. I might sound pretty dumb, but this is my first compact Mac and I don't really know how to take it apart. I can open the cover and all, but then I have no clue what to do
     
  9. MacTech68 macrumors 68000

    MacTech68

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    #9
    You really are going to have to read more.

    From my earlier post,

    Firstly, I recommend doing a google search for:

    macintosh_128k.512k.pdf


    Get that and read it all the way thru. It shows you what to do.

    However, if you are seriously concerned, talk to a more knowledgeable friend/relative and get them to help you.
     
  10. Gamer9430 thread starter macrumors 68020

    Gamer9430

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    #10
    Hey, I'm sorry about being slow to things... My head has been all over the place the past few days between looking to fix the computer, having midterms, and to clean out my basement. I really appreciate your help.
     
  11. MacTech68 macrumors 68000

    MacTech68

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    #11
    No problem. Sorry if I came over a bit OTT.

    Take it slowly, read all the stuff, and don't rush into it - that's the best advice I can give. :)

    If you don't understand something - do ask - I promise I won't bite - too hard. ;)
     
  12. Gamer9430 thread starter macrumors 68020

    Gamer9430

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    #12
    No problem, it's my fault I didn't read it over too thoroughly. The guy I bought it from said his friend might have an external, and he would be willing to sell it to me. So I'll see how that goes. The drive itself works fine, I just can't eject stuff properly
     
  13. MacTech68 macrumors 68000

    MacTech68

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    #13
    These drives suffer from lubricant that hardens over time. The auto eject sled and disc cradle requires a certain amount of force to activate (you can get an idea of how much when you manually eject with the paperclip method).

    They really need to be stripped down, cleaned, re-lubricated and re-assembled. However, it seems there is a new problem arising with one cog in the eject motor gearbox becoming brittle and disintegrating when the mechanism's lubricant hardens and the force to overcome it becomes too great.

    I used to recondition these drives and found that the best way was to attend to every common fault, clean, re-lubricate and then reassemble. This brought the vast majority of faulty drives back to life.
     
  14. bunnspecial macrumors 603

    bunnspecial

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    May 3, 2014
    Location:
    Kentucky
    #14
    Which tells me that it's probably a good idea to rebuild a drive of questionable origin before even attempting to use it. The drive in my Q700 not only had issues with dried grease, but also had dust caked in it everwhere, and left me using a pair of tweezers to pick it all out.

    BTW, I've been using plain lithium grease-the kind that I can get in a tube or can at an auto parts store for a few bucks, and has about the look and consistency of vaseline. Should I really switch over to using white lithium? If I could get tub of white lithium(rather than an aerosol can) I'd use it, but have had bad experiences in the past with aerosol greases and getting the right amount where I want it.

    The lithium grease that I've been using on floppy drives has also seen heavy use on the slide rails and guide rod of my m1911 pistol, as well as on the sliding parts of my Smith and Wesson and Colt revolvers. None of them have complained yet :) . At the same time, though, that's a totally different application and I don't want to inadvertently mess an old disk drive by using the wrong grease on it.
     
  15. MacTech68, Jan 23, 2015
    Last edited: Jan 23, 2015

    MacTech68 macrumors 68000

    MacTech68

    Joined:
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    #15
    Yes. A very good recommendation.

    I hate using aerosol packed lubricants purely for that reason. They're no really suited to small applications like these.

    As for the choice, I'm not certain. I used a grease designed for old VCR transport decks with all their cams, gears, actuators and other metal-to-metal, plastic-to-metal and plastic-to-plastic greased parts. It's labeled as "long lasting" and I still have that pot and it's STILL the same consistency it was when new. Sadly, it doesn't have a brand name attached.

    I always remove the 4 split washers that hold the sliding deck (after removing the eject motor assembly) and clean the sliding deck and the cast metal hub motor deck it slides on. Makes for MUCH easier cleaning.

    EDIT: The company I used to buy the grease from now sell "MOLYKOTE® DX PASTE"

    http://www.dowcorning.com/applications/search/default.aspx?R=11354EN
     
  16. miniMOJOman macrumors newbie

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    Jan 17, 2015
    #16
    There are replacement gears and instructions available on how to replace them on the web.
     
  17. Gamer9430 thread starter macrumors 68020

    Gamer9430

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    Central New Jersey, USA
    #17
    Yup, I found them. Thanks anyway!
     

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