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Thread: I have been battling this slop for awhile.

  1. #11
    Join Date
    Dec 2007
    Posts
    2,300

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    Quote Originally Posted by knight_toolworks View Post
    mine is the one piece y carriage. so it would be pretty bad if it was warped. but a little fiddling and I got the wheel tight after I used a needle nose pliers. I need some thinner wrenches. so I can adjust the z wheels.
    When you say a one piece carriage is it a PRS I had to loosen all the allen bolts on one side and the end plate settled down on both rollers

  2. #12
    Join Date
    Sep 2006
    Location
    cnc routing, portland or
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    3,623

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    the prt has a one piece frame with attached rails well the newest version had it. . but I got the wheel adjusted. but then I found the y pinion loose even though I just checked it yesterday maybe because the machine was cooler. the last set of pinions came with much smaller set screws and you can't tighten them down as well.

  3. #13
    Join Date
    Jan 2013
    Location
    PA
    Posts
    31

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    Use loctite on them.

  4. #14
    Join Date
    Sep 2006
    Location
    cnc routing, portland or
    Posts
    3,623

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    I did but they are small enough the Allen wrench twists. they are smaller then usual so you can't get the tool to not bend trying to tighten them.

  5. #15
    Join Date
    Dec 2008
    Location
    , Richmond Tx
    Posts
    1,029

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    I gave up the fight and bought a ball screw machine. It's not perfect, but the problems are much smaller. On the first prt I had, I welded up all the bolt together sections, then bent them back straight from the welding, and added a bearing on the Y opposite side of the motor along with a spring to pull that side tight to the gantry. It did help a lot.
    Kenneth

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