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Thread: Bed Support

  1. #11
    Join Date
    Jul 2011
    Location
    Timmins, Ontario, Canada
    Posts
    1,825

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    Quote Originally Posted by dewey_dog View Post
    I am in the middle of rebuilding my BT48. I have converted it to all THK linear bearings a new Z axis and will be adding a Spindle. I built a t-slot table as you can see in the pic.
    You should do the 3" lift at the same time. Second best thing I did to mine, after the aluminum table/vac hold down.

    Just added two pieces of 3" x 1 1/2" extrusion to lift up the gantry. Now I have lots of Z height, and no sign of less rigidity in cutting.

  2. #12
    Join Date
    Feb 2016
    Posts
    9

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    I'm with Ajcoholic ... consider raising the gantry. From your picture, the gantry is already off ... that's the hard part. It's well worth the effort. For me, the stock dust skirt was a PITA to work around when changing bits. With the increased z, I can raise the spindle up and drop the skirt clear out of the way. Not to mention the set screw to raise and lower the dust skirt was awkward to reach until I increased the z. Plus, increased z for machining larger parts. The aluminum bed and raising the gantry were two of the three best mods to my machine.

  3. #13
    Join Date
    Nov 2006
    Location
    , Sylvania Ohio
    Posts
    68

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    I did not layout my whole plan I have 1.25" tool plate aluminum gantry sides being cut which are taller. I will write a post detailing the build when it is near completion.

  4. #14
    Join Date
    Mar 2015
    Location
    Troy, OHIO
    Posts
    87

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    I really like what you have. I went to the Hubbard CNC web site and did not find anything like it. Would you by chance have a part number of some sort I could enter to find it?

    I have a BT32. It appears that you also added the rollers on each side. Am I correct?

    Sorry for so many questions.

    Thanks
    Phil
    BT 32 Standard
    2.2 HP Spindle
    Aspire Sofrware

  5. #15
    Join Date
    Feb 2016
    Posts
    9

    Default

    Since rollers were mentioned, I'm guessing the question was for me ...

    I didn't use Hubbard products on my bot. I used mostly 80/20 parts, specifically the following part for the platform: https://8020.net/shop/1030.html (purchased through amazon or ebay).

    The roller side plates were machined from 3/16" aluminum sheet on the bot and the rollers are skateboard wheels with ABEC bearings (8 wheels per side).

    The mod required me to fab some small custom parts to make the overall build work, so definitely not a design I would recommend someone try to duplicate ... there are most definitely better ways. The final build was the third iteration of my original design, so there are definitely things I would have done differently from the beginning that would have changed the final outcome and perhaps not required the small custom parts.

    The takeaway message: aluminum tables are the way to go if your work area suffers from high humidity.

    J

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