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  1. 31-08-2013 #3
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom.
    Jonathan
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    There are some figures for belt stiffness here:
    http://www.gates.com/common/download...talog_5_11.pdf

    On the micro lathe I made with preloaded nuts (here), and more recently the CNC router with the same system (here), it was possible to obtain zero backlash (in steady state at least) by tensioning the belt properly. The tension on the belt was a lot higher than I expected would be required. I expect there's probably still extra hysteresis in the system caused by the belts.

    You could make your own pulleys with lower clearance. I suspect the belts would wear out faster, but that's probably not an issue on a CNC router where they're only lightly loaded.
    Last edited by Jonathan; 31-08-2013 at 12:03 PM.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.
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