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Thread: reproduction PDP 8e toggle switches?

  1. #1

    Default reproduction PDP 8e toggle switches?

    Is/has anyone reproduced the PDP8/e orange (two color tones) plastic toggle switches?
    Don't have cad or 3-D printer access, so hoping someone already has done this and has these available,
    they seem to be a commonly failed part...
    thnx Roger in NY

  2. #2

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    BTW: I've one of Rod Smallwood's reproduction front panels and it is superb. I'm no expert but I cannot tell any differences from the original. Not sure if they are still available, but if so get one while you can, highly recommended!

  3. #3

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    If its just the plastic nibs holding them in place are broken you can drill and insert a metal rod to fix them. The colors don't seem to match well between different machines so replacements may not match well.

  4. #4

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    Thanks, no, I have an 8/e light/switch PCB panel with multiple missing plastic switch paddles, so not a matter of repair.
    Imperfect colors are ok, better than no paddle at all.

  5. #5

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    I have asked for the same knobs a while ago...
    And I have tried to reach mr Rod Smallwood. But he does not answer any emails...

    So I have been talking to a specialist which I know personally. He is a well known professional in the replica business for years.
    He has reproductions of knobs, dials, and many other parts. https://www.bendijkman.nl/

    I have a price for PDP8 front panels already and he is investigating the knobs. Because materials have
    always a bit colour difference, the idea is to make a complete replica knob set for one machine.

    The point is, that it is unknown how big the demand will be. And then what about the costs?
    How much would anyone pay for a complete set of replica knobs for a PDP8?
    If that is known Ben has an idea about how much effort to put in these replicas.

    So maybe we should have a poll on these knobs. Who is interested and how much are people willing to pay for it...

    Regards, Roland
    Last edited by Roland Huisman; August 23rd, 2020 at 12:29 AM.
    WTB: Case for Altair 8800 ...... Rolands Github projects

  6. #6

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    From the look of it, these toggle switches are not very complicated and should be easy to design in any CAD tool. And using SLA 3d printing, you can produce lots of them in little time and in perfect quality. Color is best done using spray paint later.

    Too bad I don't have a PDP 8e toggle switch as a blue print, otherwise I could help out.

  7. #7
    Join Date
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    My son is a 'whiz' with 3D printers - he used to work with them for a job.

    Things are not as simple as you may think... These took a long while to produce - they have a high-quality surface finish.

    Anyhow, he designed some PDP-8 switch toggles for me for a project (see https://drive.google.com/drive/folde...G8?usp=sharing). Not quite identical to the original - but suitable for my use. He developed two designs - one with the spigot and one without. The problem with the spigot variant was one of resolution and strength. The ones with the holes for a rod are beautiful.

    The orange and yellow colours are filament that is 'off the shelf' - so a little garish... However, you can get colour-matched filament now. Not sure what price we are talking about though.

    Willing to share the design if that would be of help.

    Dave

  8. #8

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    Quote Originally Posted by daver2 View Post
    Things are not as simple as you may think... These took a long while to produce - they have a high-quality surface finish.
    Not sure why the "high-quality surface finish" of the original switches matter when talking about re-creating them for 3d printing. In case you refer to some kind of texture, it takes 5 minutes to make a grid of very small spheres and substract that from the outer surface of the 3d model to create a texture. I think many people overestimate the complexity of modern CAD tools. All that stuff has become very easy to do.

  9. #9

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    Is that the same:
    https://www.thingiverse.com/thing:360853

    or does the 8e uses different ones?

  10. #10
    Join Date
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    Location
    UK - Worcester
    Posts
    4,100

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    Yes, it is a derivative of that part.

    The 'high quality surface finish' I was referring to was for the 3D printed item, not the original.

    I have seen quite a few 3D printed parts where the quality of the final result was awful...

    Dave

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