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Spindle mount to allow tramming

Discussion in 'CNC Mills/Routers' started by Apeli, Feb 10, 2020.

  1. Apeli

    Apeli New
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    I need to tram my router/spindle to get it level. It's not far from level, but I can't find any simple ways to adjust it all the way. So I have been trying to come up with a router mount that would allow tramming adjustments. I came up with a plan:

    - Add a collar to the bottom of the router body, just above the collet. This isn't attached to the Z-axis.
    - The actual mount has 4 screws that go vertically through the mount and touch the collar.

    The idea is that you could tighten the mount 95%, use the screws to tram the router head and then tighten the mount 100%.

    Anyone tried something like this? Anything wrong with my reasoning?
     
    Alex Chambers likes this.
  2. Alex Chambers

    Alex Chambers Master
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    Interesting idea. I would love to see a drawing. I had an idea for the same problem (couldn't work out how to hold the router & mount still while tightening) a while ago - Tramming aid - but I never got as far as making an aluminium version. I think you're idea sounds better than mine.
    Alex.
     
  3. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Suggestion:
    Router mount can be used to tram left-to-right. But fixed reference of X gantry is good!
    Then tram X gantry to Y rails (slightly loosen end plates)
    Square Y rails, then surface spoilboard. That's it! Done :)

    Key here is people forget you can tweak the X axis extrusion's rotation ever so slightly, to tram back-to-front :)
     
  4. Apeli

    Apeli New
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    Oh well, it didn't work. Basically the main clamp needs to be 100% tight and when it is 100% tight, all the micro adjustments you could do with the screws are gone.

    Adjusting the rails / end plates gets harder with a larger machine, my X is 1900 mm and Y 870 mm, and the taller OX Y-plates I just got have so little play in the bolt holes that I can't use that to get to 100% level.
     
  5. Logan Blankenship

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    @Apeli did you ever figure out a solution for this? I have the lead machine but am having trouble tramming my router front to back. Would like to hear if you figured anything out!
     
  6. Apeli

    Apeli New
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    No, ended up upgrading my spindle mount, which allowed tramming with "normal" methods, shims etc.
     
    Logan Blankenship likes this.
  7. Logan Blankenship

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    I ended up getting mine close enough for my needs. But out of curiosity which mount did you upgrade to?
     
  8. Apeli

    Apeli New
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    I got some 12 mm aluminium plate for the Z gantry and a "Funssor 43 mm Kress spindle mount" for the mount. I drilled one of the mounting screw holes a bit oversize to allow left/right tramming.
     
    Logan Blankenship likes this.

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