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Thread: Reducing X and Y Axis Backlash on a RF-30 Mill/Drill

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    rgsparber's Avatar
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    Reducing X and Y Axis Backlash on a RF-30 Mill/Drill

    There are two sources of backlash on the X and Y axes. The most obvious one is the play between the leadscrew and its take up nut. There is an adjustment on the nut but first you have to be able to access it. A less obvious and possibly larger source of backlash is in the thrust bearings associated with each leadscrew. It can be shimmed out resulting in a dramatic decrease in backlash. Will it turn a leadscrew into ballscrew performance? Dream on...

    http://rick.sparber.org/XYBR.pdf

    I welcome your questions and comments. All of us are smarter than any one of us.

    Rick

  2. The Following 5 Users Say Thank You to rgsparber For This Useful Post:

    dwbachor (11-28-2017), Jon (06-01-2015), kbalch (05-04-2015), Moby Duck (11-28-2017), PJs (06-02-2015)

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    Thanks Rick! I've added your X-Y Backlash Reduction Method to our CNC category, as well as to your builder page: Rick Sparber's Homemade Tools. Your receipt:


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    Hi Rick,

    Great writeup, as always! Your X-Y Backlash Reduction Method is our 'Best Documented Build' for May, 2015!

    You'll be receiving a $35 online gift card from GiftRocket.

    Just send me (via PM) your email address and we'll get things processed directly.

    Congrats!

    Ken

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    This thread has been moved to the Must Read subforum. Congrats (and thanks) to Rick for making such a valuable contribution!

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    Play within the takeup nut assembly will also contribute to backlash. However, no moving assembly can function with zero backlash because without mechanical clearance it would be bound solid. Even ball screws have a small margin of clearance and hence a small margin of backlash

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    I completely agree. If you go back to the article and move up one level in the directory, you will see a series of articles dealing with the complete story. Thinking about leadscrew XYZ translation, roll, pitch, and yaw are all essential pieces of the puzzle.

    Rick


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