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IBM Model 29 Keypunch Station

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  • Chuck(G)
    replied
    You can probably get the rubber rollers redone by Terry's Rubber Rollers. Drop him a line and see what he says.

    Leave a comment:


  • NeXT
    replied
    Power supply checkout finished today. They aren't rocket science. You got a switch, fuse, a transformer, two capacitors, a resistor and two diodes. Caps tested and reformed fine. All other components also tested fine. Powered up fine as well.

    Leave a comment:


  • NeXT
    replied
    So while I wait for replies to a number of emails (I wonder if I should pester cctalk as well...) I washed the enclosure and after two passes with the magic eraser it looks a lot better now.


    You can tell that welding is my passion. :B
    The hinge for the piece covering the program drum has been repaired.



    It's gonna need at least one belt.


    Which means I'm starting to dig into the punch itself. For now going over pieces with a brush and compressed air to clean out the dirt and it's getting a lot of the yuck, dust and paper chips it's full of. I was able to get the punch interposer block off to inspect and clean but I have to research a bit more into how the printer comes off. The linkage is really weird and I need to read the manuals again.



    The card path is rough with surface corrosion however a bit of rubbing with some chrome polish returned a spot back to a usable surface so much of the card path that can be removed will be taken off and buffed while I'm going to try cleaning the rest with a buffing cone.




    This will be a problem. The four rollers that are part of the input hopper have been left to sit for so long the steel spring loaded rollers above have sunk into the rubber and the rubber has hardened. This is probably going to cause me feed issues later but for now I will continue to focus on mechanically getting it working again.
    Initial lubrication started today as well. Mainly cam rollers or bearings that felt tight got one drop of oil and I'll investigate them again in a few days. So far I have managed to trip the bails for the feed and punch sections with no seize-ups so it will probably just need a heavy lubrication and it will be ready without having to be anything like the headache that was a fully mechanical cash register I rebuilt 2 years ago.

    Leave a comment:


  • Chuck(G)
    replied
    Good! Even when these things were current, swiping drums was a thing--basically you brought your drum with the program card already mounted and stuck it in the keypunch. Clearly, having the drum on hand was a thing...

    Leave a comment:


  • NeXT
    replied
    Originally posted by Al Kossow View Post

    Have you tried contacting anyone on the CHM 1401 restoration team? They have IBM drawings and may have the diagram for the Model C
    Any recommendations where to be getting contact info other than ibm-1401.info? I didn't consider they might be able to help here.

    Originally posted by Chuck(G) View Post
    I take it that a program drum wasn't part of the lot. Good luck scrounging one up.
    Nope, I got it. Just didn't take a picture of it. :P

    Leave a comment:


  • Chuck(G)
    replied
    I take it that a program drum wasn't part of the lot. Good luck scrounging one up.

    Leave a comment:


  • Al Kossow
    replied
    Originally posted by NeXT View Post
    From here I only have one other big issue and that is the wiring drawings for the Model C are not on bitsavers
    Have you tried contacting anyone on the CHM 1401 restoration team? They have IBM drawings and may have the diagram for the Model C

    Leave a comment:


  • RadRacer203
    replied
    So glad that keyboard didn't get scalped! Good luck with the project!

    Leave a comment:


  • Chuck(G)
    replied
    Well, at least you'll have something to occupy your time and keep you off the streets...

    Judging from the keyboard, the interposer mech seems to be gunked up...

    Leave a comment:


  • NeXT
    replied
    You underestimate how insane I am.

    Leave a comment:


  • Chuck(G)
    replied
    Given the condition of the item, I think you're being a bit optimistic...

    Leave a comment:


  • NeXT
    started a topic IBM Model 29 Keypunch Station

    IBM Model 29 Keypunch Station

    Officially the craziest thing I've ever done.

    This came out of the Houston sale. As it turns out there was three keypunches in all however the other two were incomplete Model B's while this one was a Model C that for some reason had the badge of a 129 and its keyboard. After some extra photos and a few phonecalls I was able to negotiate a price and pair the machine up with a Model 29 coverplate again and a slightly more matching keyboard. With some help of two other members we split freight for one skid three-ways and it landed in Canada two weeks later for pickup.





    There was speculation a lot of items at the sale would of had heavy weather/moisture damage but as it turns out we all received equipment that internally wasn't rusty or showed any signs of weather related damage but was really, really dirty. As you can tell the machine is missing the desk, which I don't mind as I can make another one but only after it was here did I realize the Model AB and the Model C have different name badge coverplates. The one I received doesn't fit as the cutout for the print interpreter interposer was missing. If anyone would like to trade panels or has the correct one I'd like to hear from you please.




    The lower cabinet, power supply and relay chassis are all in good condition and the chip bucket had all the various screws, fasteners and pieces that I didn't remove when separating the two halves. For something that supposedly weighs north of 200lbs it got quite easy to transport once it was dismantled into smaller and more easy to manage pieces.




    For where it was stored it's in very good condition. The grease has not completely dried out yet and nothing appears to be seized. I would not be at all surprised if it starts to really come back once cleaned and relubricated.





    This is as bad as it got. The pot metal that made up the programming drum and its assembly was starting to corrode up but the drum especially cleaned up with vinegar and water.


    Here is the keyboard I received. It is for a model 29 but not for a model C as the switch for PUNCH/INTERPRET is missing. The control wiring for it would be on the green wire harness pictured on the right. It is also quite clean with no rust and will come back fine with a cleaning.

    From here I only have one other big issue and that is the wiring drawings for the Model C are not on bitsavers so I'm going to have issues fixing a few pulled wires on the relays. Likewise I have a few outstanding questions on a few other things such as contact cleaning (deoxit soaked strips of paper or 1200 grit buff cloth?) and dealing with the half dozen rubber rollers that are in the machine that are not melted and might come back with a reconditioning. Mr Verdiell's video when he cleaned up his machine is helpful here, as is Conmega's thread when he got his own 026 punch a few years ago. [link]

    Scheduled completion of this project is next spring.
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