Welcome to Our Community

Unlock hidden features. Sign Up for Free Today!

C beam upgrade for OX

Discussion in 'CNC Mills/Routers' started by MartinTurner, Nov 8, 2015.

  1. MartinTurner

    MartinTurner Well-Known
    Builder

    Joined:
    Apr 1, 2014
    Messages:
    16
    Likes Received:
    11
    Hey chaps.

    I am looking at upgrading my ox router which has done a great job for the last year or so.

    Having baulked at the price of linear slides and screws as well as a significant amount of custom ali machining work that would be required to make them work, i though i would take another look at C Beam.

    I want to mill aluminum and hardwoods. My ox jumped it's belts the other day milling 21mm pine in cuts of 3mm.


    Questions. Any help much appreciated.

    1. How would a c beam actuator compare in strength to say the belts i have now or something like SBR 20 rails ?
    A). I now know - Not as good, but much cheaper.

    2. What is the lead screw that they come with - It looks like quite a narrow pitch -
    Will it be ok for a long y Axis - Would it not be to slow to move the machine around quickly ?

    3. Would it be possible to run wheels on the inside and outside of the cbeam for maximum rigidity?

    4. Is it possible to get a cbeam linear unit 1400mm / or make one ? I see they sell 1500mm lengths.
    A). I now know - To much whip in screw thread at over 1m.

    Thanks for any help you can offer me...

    Martin
     
    #1 MartinTurner, Nov 8, 2015
    Last edited: Nov 10, 2015
  2. MartinTurner

    MartinTurner Well-Known
    Builder

    Joined:
    Apr 1, 2014
    Messages:
    16
    Likes Received:
    11
    Hey guys anyone got any thoughts on this idea of running mini xtreme wheels on the bottom (and maybe top) of the C beam as well as in the middle for the x and y axis of a Cbeam OX?
    Was thinking I could also use 2 nut blocks to lessen the chances of backlash. Obviously the main gantry plate is not yet there, but just trying to iron out the concept...

    I hate the idea of the Nema23 mounted on only 2 spacers at the end of the Cbeam. Thinking i am going to have to design custom end plates.

    yaxis.png
     
  3. Florian Bauereisen

    Builder

    Joined:
    Feb 24, 2014
    Messages:
    145
    Likes Received:
    44
    Hi,
    having no first hands experience on these ( i use linear rails on my mills) my comment is purely voicing my opinion.
    1. Running the wheels inside onyl will give them little leverage among each other - thus any plate attached will tend to "rotate" (wobble) easylie.
    Compared to that mounting them up and down would be much stronger.
    2. Running wheels inside and outside makes - to me- as little sense as using 4..6 ..8 wheels in a row.
    Reason is that you simply do not know which weel is "loaded"/ in full contact and which is not. Using excentrics is not going to solve that for:
    -applying a lot of preassure "to make sure" will only result in a lot of friction
    -no surface is completely straight. imagine now a statinary setup while trying to mount a plate say horizontally. So one wheel is pushed down into a "vally" while another next to it is lifted up a "hill", next is... and so on.
    Satisfied your plate beeing mounted perfect horizontal you now move your plate left and right....
    see?

    Btw. why not going "belt on belt" drive for a first and relatively cheap mod first ?

    Just food for thought

    greets

    flo
     
    #3 Florian Bauereisen, Nov 14, 2015
    Last edited: Nov 14, 2015
  4. ChadRat6458

    ChadRat6458 Journeyman
    Builder

    Joined:
    Dec 10, 2014
    Messages:
    41
    Likes Received:
    4
    I have be thinking the same thing. I would like to upgrade the X axis first. I am wondering how hard it would be with my existing y axis plates.
     

Share This Page

  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Building needs!
  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provide resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop theirs!

    Donate to FairShare!