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  1. 17-06-2012 #19
    Robin Hewitt's Avatar
    Lives in Seaford, Sussex, United Kingdom.
    Robin Hewitt
    Last Activity: 5 Days Ago Has been a member for 9-10 years. Has a total post count of 1,614. Received thanks 109 times, giving thanks to others 7 times. Is a beta tester for Machinists Network features. Referred 1 members to the community.
    It would seem there is a generous tolerance on 1/4" extruded aluminium

    I was expecting 6.35mm but I got less. On the drawing the clearance between my 8mm shaft Z axis and 15mm rail X axis dropped to 35 microns.

    I put it together somewhat gingerly, but it runs fine and dandy.

    To see if it really was 35um I rolled it over a piece of paper (80um) and it came out curly.
    Next I need a 3 metre darning needle to thread the T5 belt through the gantry
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