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  1. #11
    Quote Originally Posted by M250cnc View Post
    Your not agreeing with me are you.

    I use these belts on my lathe the Z is about 300mm BC

    I was cutting some tool steel and a bit too hard it pushed the bar in the lathe chuck but the pulleys are about 30/40 each, built it has awesome power. Backlash is 0.05mm

    Phil
    Sorry maybe I came across wrong there - I meant to agree with you!
    I meant to say that the laser cut pulleys and only 5mm wide belts were not good.

    I've used XL pulleys and 1/2" (some bigger) belts on my machines. HD belts would be nice...

    Quote Originally Posted by Jonathan View Post
    ...better than the X-axis nuns.
    Just noticed that typo I made - oops!

  2. #12
    Jonathan

    I was joking, as we always seem to be at loggerheads.

    Phil

    Sent from my HTC Desire using Tapatalk

  3. #13
    Thank you all!
    Jonathan,
    You have done exactly what I intend to do.
    Except that I was going to use an ACME rod.

    Where did you find this thing on the picture, enclosing the ball bearing?
    Did you get it machined?

    Click image for larger version. 

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    Laurent
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #14
    Quote Originally Posted by LabSkis View Post
    Where did you find this thing on the picture, enclosing the ball bearing?
    Did you get it machined?
    I cnc milled it on my machine. I can send you the drawing/Gcode/make another if you like. I made it that slightly odd shape to fit in a tight space on the Z-axis before changing the router design somewhat and using it on Y. If I did another for the Y I would leave more material there for the bolts, and put a spring/belville washers on the bolts so that it rides over imperfection in the screw,

  5. #15
    OK. Thanx for your proposal.
    But I have nothing around here to get this thing machined.
    For the moment, I think I will stick to 0 backlash nuts like the one you find on dumpster cnc.
    Yet, do you think it has a real advantages on those nuts in terms of backlash or friction? Despite the Acme being worn by the roller bearing?

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