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  1. 18-04-2019 #9
    deemoss's Avatar
    Lives in Athens, Greece.
    deemoss
    Last Activity: 15-12-2022 Has been a member for 9-10 years. Has a total post count of 5. Received thanks 4 times, giving thanks to others 0 times.
    Quote Originally Posted by johnsattuk View Post
    I would have thought that the green idler removes the backlash with the red idler providing belt tension. I designed a somewhat similar layout for a servobelt drive I built.
    The green pulley does nothing to the principle of operation. You could theoretically remove it and have some slack at the top part of the belt. This slack would never stretch since the pinions engage the same rack, which prevents them from rotating in opposing directions (which would take the top slack). The only reason for the green pulley is to prevent this slack to bounce up and down.
    Last edited by deemoss; 18-04-2019 at 03:07 AM.
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