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30mm V-slot rail

Discussion in 'Share Parts' started by mrwolfe, Mar 1, 2015.

  1. mrwolfe

    mrwolfe Well-Known
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    Hi All.

    I have a friend who could use some openrail that's a bit beefier than the standard 20mm, so I've come up with a concept that I'm thinking about putting up on Kickstarter or Indigiogo. It's basically a beefed-up 30mm version of the 20mm openrail V-slot.

    The bigger section has a few advantages:
    - stiffer, particularly over longer runs (e.g >3m)
    - wider slot means that 6mm belts can be run in the slot without fraying
    - inter wheel distance is 80.5mm (20.5 + n*30, where n is the number of cell widths)
    - 8mm belt can be run in the slot with a new wheel design.

    There are also some disadvantages:
    - more expensive
    - wider slot is not compatible with existing wheels.

    The design is compatible with Bosch T-slot rail and components.

    If I can get this up, I'd like to make it available through the part store.

    Thoughts?

    Tony
     

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  2. dddman

    dddman Master
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    Just for fun, get a quote on how much a 3m slot could cost to ship :)
     
  3. mrwolfe

    mrwolfe Well-Known
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    Which is why the maximum length is 1.5m from the parts store :)
     
  4. sgspenceley

    sgspenceley Master
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    I think a range of 30mm wide V slot would be very useful for cnc machines, 20mm is too light in weight in my opinion.
     
  5. stargeezer

    stargeezer Veteran
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    I've just finished my first Shapoko 2 build (1 meter by 1 meter) and while I think it's viable for lots of folks, I'm not sure it's strong enough for me and my needs. I do have a 1.5kw spindle on the machine after a DW660 proved to be a bit light for my taste and the weight of the spindle stresses the doubled 20mm V rail even with a 1/4"x 1 1/2" sandwiched in the middle. To solve this issue I'm planning a rebuild of the mill that will include gantry plates made from 1/2" aluminum plate, 15 series 8020 3"x 6" main cross beam, Z axis made from 1545 (1 1/2" x 4.5") moved by 3/4" acme threaded rod and 20mm linear bearings and supported rails. I'm using the Shapeoko to cut all my plates - cut very slowly, unless I can find somebody to cut them for me on a better mill.

    As you may guess, the only thing I'm keeping is the spindle and the bench it's built on.

    I will be posting everything in the builds area.
     

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