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  1. 16-02-2016 #6
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom.
    JAZZCNC
    Last Activity: 19-01-2024 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 8,446. Received thanks 1,445 times, giving thanks to others 109 times.
    You don't need a ground or even machined surface just so long as it's resoanble flat and stright.

    Mekanik is correct that you don't want the Rack facing upwards as it will soon fill with debris and you'll have allsorts of trouble. Idealy you want it facing downwards and the Pinion spring loaded into it. This way if your surface isn't perfectly flat the pinion is still fully engaged.

    Could have it on it's side but still you'll want some form of guard above to stop debris falling into the rack
    Last edited by JAZZCNC; 16-02-2016 at 06:12 PM. Reason: Deleted Edit: I was wrong
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