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  1. #1
    Senior Member
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    Feb 2004
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    New frame jig for sale on instructables

    This isn't an advertisement, I just noticed this instructable

    http://www.instructables.com/id/Buil...-routed-frame/,

    that showed how to use this frame jig

    http://www.flatpackfoundry.com/index...&product_id=50

    For 350 dollars this seems like an ok deal for a hobbyist builder, what do the more experienced folks think?

  2. #2
    Randomhead
    Join Date
    Aug 2008
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    Happy Valley, Pennsylvania
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    there are a number of plans out there for much nicer jigs that probably don't cost that much. You can get aluminum extrusions from Misumi for a very reasonable price. Apparently nobody has ever felt like offering a kit though, that is one disadvantage. I'm guessing a lot of these jig kits don't get built.

    We discussed the jig in question in this thread.

  3. #3
    Senior Member
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    Jul 2011
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    Before buying anything, I would create a list of things a jig might do for you, such as:

    Be easily adjusted

    Be easily positioned for hot work, so you can have parts at any angle you want so gravity is your friend

    Have sufficient offset, and yet be sturdy enough that offset does not compromise function.

    Be reasonably able to handle the range of designs one want to create.

    Easily related design parameters to jig position. This can be a big time waster. The Paterek method works, but is quite time consuming to relate.

    Define dimensions and fits

    Be adapted to your form of building

    Fix parts firmly enough that they do not shift during reasonable hot work

    Increase efficiency

    Contribute to the professional level of your shop where relevant

    Aid in designing

    Support purging, heat sinking, grounding, whatever...

    Etc...

    Then ask yourself whether a particular design will do whichever of these or others, you want. I have 5 basic requirements, and most of the jigs I looked at were pretty close to zero on them. The jig I eventually bought thinking it would handle my 5, ended up not doing it, it only hit 3. For instance it was too short for some of the frames I wanted to build, it had never occured to me to ask, since I assumed it would build something other than track bikes...

    A lot of jigs are just jigs, the don't actually do anything.

  4. #4
    Randomhead
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    I recently realized I would have a really hard time building a 'bent on my jig. that's a little annoying

  5. #5
    Senior Member
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    I have a tandem project idea, half of it will probably be straight...

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