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c-beam

Discussion in 'CNC Mills/Routers' started by John Williams, Apr 18, 2015.

  1. John Williams

    John Williams Well-Known
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    [​IMG]does anyone have the construct files and BOM for this? I am interested in building this model.
    Thanks
     
    mybuild14 likes this.
  2. MashX

    MashX Well-Known
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    Where did you find that? Do you have a sketch up file we can check out?
     
  3. John Williams

    John Williams Well-Known
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    Off Openbuilds.com advert for C-Beam. Bottom of Page
     
  4. John Williams

    John Williams Well-Known
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  5. John Williams

    John Williams Well-Known
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    I really like this build. Using with c-beam with screws instead of timing belts. I am interested in something in between a knee mill and a router. I need at least 10" of z axis. For clamping, vice or what not. I have no interest in cutting plywood only hard plastics and soft metals. Minimum 20"×20"x10" working area. Also a build like this could accommodate the use of a 3d printer and a exchangeable heat bed.
     
  6. John Williams

    John Williams Well-Known
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    I have figured most of this build, off the picture. Except I have exchanged the y axis area to the 1 meter C-Beam and the z and x axis to 500mm. Using scrap 16 cm extrusion I have laying around the shop I can make a pretty sturdy mounting frame. I would rather use rails and thicker screws. Like I said before I am trying to gain a higher z axis and a more sturdy cut. I am also not trying to break my budget. Electronics is the next step. The order for the materials should be out completed today. Anyone have suggestions on what electronics I should go with? Should be simple sweet and run off a tablet PC (USB -no parallel port available.) ---Thanks
     
    #6 John Williams, May 2, 2015
    Last edited: May 3, 2015
  7. Florian Bauereisen

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    Hi,
    you may check out this build on YT:


    Even though it seems to cut nicely i personally belive that supporting your bed on only one support central beeing the culprit of a machine like that.
    Especially if you want to have a high z to clamp a vice onto that.
    You will ad a "momentum" around the support ( if milling is done outward from the center) and thus the part may sorta "roll" (twist) around your c-beam.
    It does work, as the vid shows, but is it beeing satisfactory.. specially if you are milling metals?
    How sturdy is the c-beam setup really?

    How about using 2 c-beams coupled to a single motor using a belt?
    just food for thought...

    greets

    flo
     
  8. John Williams

    John Williams Well-Known
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    I have thought the same. I am thinking of using 16mm support rails under an aluminium t- nut plate. 45cm×45cm. As for the twist on the z axis. I am not so fond of the rollers and might go with 2 linear carriage supports. Like I said I have a few things lying around the shop that I can use.
     
    #8 John Williams, May 3, 2015
    Last edited: May 3, 2015
  9. Donald D. Parker

    Donald D. Parker Well-Known
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    Be careful of making your Z axis arm very long as the longer it is the more torque is applied to the carriage and to the X axis which will allow shifting under load giving you dimmensional errors.
     

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