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Thread: Small mill project (SMP)

  1. #1
    Join Date
    Jan 2008
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    512

    Default Small mill project (SMP)

    I got a small used cnc mill a year or 2 ago and have not had a chance to go through it and fix it up. The ways (sliding surfaces) look really good - but most everything else needs a little TLC. (ball nut mounts not parallel to the slides and such)

    The mill is torn down to its individual parts and being gone through. Currently working on the Z axis slide. Again - the sliding surfaces look great - but the mating surfaces are a bit off.

    What to do.. Mount it on the big mill of course!



    Using some ground rod/123 blocks to make sure the ways are parallel and perpendicular to the K&T.



    True up the mounting surfaces... (took off about .002")



    And done..



    Things to do yet on the Z axis column..
    - mill the relief for the ball screw nut further. (go into the more later)
    - mill the mounting holes so they are symetrical. (they are all over the place.)
    - mill some line up edges for mounting to the base. (I am adding a 4 inch riser block so there is more space between the spindle and the table)

    I think that is it for now.
    Last edited by skunkworks; 06-26-2018 at 10:32 AM.

  2. #2
    Join Date
    Jan 2008
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    512

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    This is it cutting before I took it apart


  3. #3
    Join Date
    Mar 2010
    Location
    switzerland
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    1,762

    Default

    would you have a picture of the whole machine?

  4. #4
    Join Date
    Jan 2008
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    Hmm - That is a good question... I didn't really think about documenting it until I had it tore apart.. Go figure.

    Oh - I have a crappy one...


  5. #5
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    Jan 2008
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    This is what really set off the 'go through'



    The x axis ball nut block was not mounted parallel to the ways. (poor thing) and the more I dug into it - the more little problems there was. (not unexpected - this was a prototype)

    This should be one solid machine once I am done.

    sam

  6. #6
    Join Date
    Jan 2008
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    Found a chunk of cast iron (part of an old grinder..) to make a 4 inch riser. (this is to raise the Z column)

    I needed a piece about 7"X5"X9".

  7. #7
    Join Date
    Dec 2004
    Location
    East Coast, USA
    Posts
    5,642

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    Where is the SMP? Are you rebuilding/processing both X and Y axis's at the same time symmetrically?
    Work hard play hard

  8. #8
    Join Date
    Jan 2008
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    512

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    Started on the base (y axis)

    mounted it similar to the vertical column.. Then trued the feet to the ways then cut some reference points..





    Now - flip it and make some measurements and reference points.




  9. #9
    Join Date
    Jan 2008
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    512

    Default

    4" Riser block kit... slight machining required. ..


  10. #10
    Join Date
    Jan 2008
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    512

    Default

    The hacking has started...


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