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Thread: 5 axis Gantry style Milling Machine prototype

  1. #61
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    Default Re: 5 axis Gantry style Milling Machine prototype

    Quote Originally Posted by 1Jumper10 View Post
    Your bearing rails probably use M6 screws for mounting. The holes in the rails probably have .5mm of clearance for the screws so you can shift the rail about .25mm up or down. (I'm just guessing here so you should verify before you plan anything). Your machine shop should be able to accurately locate and machine the flat and drill the holes for your rails within those tolerances. Regardless, I would only use 1 shoulder on one rail or the other. So when you mount your rails, clamp the one rail tight to the machined shoulder and fasten it. Then move your carriage down the gantry and use it to align the other rail. If you use 2 shoulders with no slop, then it is absolutely unforgiving of any inaccuracy.

    For depth on a .375 tube, .125" is plenty deep, I would go a little shallower, maybe .1"




    I was typing while you were replying:

    The shoulder the arrow points to looks fine. And like I just explained, I would only use one shoulder there as well and just like you have drawn it.

    The shoulder(s) I was talking about originally are the ones on your gantry tube bearing rail pads.
    Thanks I'll do some more drawing then show pics lol



  2. #62
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    Default Re: 5 axis Gantry style Milling Machine prototype

    Been working on some y and z axis components.
    Please look things over see if Im on the right track lol.

    Z axis is
    25mm X 500mm Ballscrew pitch to be determined with help. When I uploaded the ballscrew and seen the size I realized why some people call this a seal club lol

    25 mm rails and bearings

    25mm T5 pulleys

    15tooth and 60 tooth

    Y axis
    25mm x 1500 mm ball screw

    The ballscrew bearing holder is recessed into the plate.

    I had to redraw this stuff several times to get it to fit. The Backplate is 18.5w x approx 18 high I forgot lol.
    The Z axis should have 7.75 inches of travel

    im thinking servo drives somewhere in 1000 torque range.

    One Z will have the rotating saw blade the other will carry a larger spindle hopefully with ATC To be determined.

    Share your thoughts

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-20170729_132617-jpg   5 axis Gantry style Milling Machine prototype-20170729_132640-jpg  


  3. #63
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    Default Re: 5 axis Gantry style Milling Machine prototype

    couple more pics

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-20170729_133848-jpg   5 axis Gantry style Milling Machine prototype-20170729_134857-jpg  


  4. #64
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    Default Re: 5 axis Gantry style Milling Machine prototype

    try a new picture capture

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-image-1-jpg   5 axis Gantry style Milling Machine prototype-image-2-jpg   5 axis Gantry style Milling Machine prototype-image-3-jpg  


  5. #65
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    Default Re: 5 axis Gantry style Milling Machine prototype

    Working on the servo mount for the Z axis.
    I figured these plates would be stronger than conventional 4 round spacers.
    The base mount will inset into the backplate to ensure square and parallel.
    Still have to design a good belt tension setup...thats next roller to push belt into small pulley for more tooth contact.

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-image-4-jpg   5 axis Gantry style Milling Machine prototype-image-5-jpg   5 axis Gantry style Milling Machine prototype-image-6-jpg  


  6. #66
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    Default Re: 5 axis Gantry style Milling Machine prototype

    Belt tensioner devise...may have to shrink the pulley to 1" instead 1.25... everything is so close lol

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-image-7-jpg  


  7. #67
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    Default Re: 5 axis Gantry style Milling Machine prototype

    Finished Version Servo Mount Belt Tension
    1/4 20 bolt will supply tension and a 3/8 16 bolt will lock it down.
    It is recessed .500 into the top plate.

    Attached Thumbnails Attached Thumbnails 5 axis Gantry style Milling Machine prototype-image-8-jpg  


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5 axis Gantry style Milling Machine prototype

5 axis Gantry style Milling Machine prototype