BobsCNC Evolution Series - Page 132

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10b Tighten the four Screws in the Router Z Mount. Align
each Screw with one of the elongated access holes in the
back of the Gantry.
Note: To align the access hole with the Phillips head screws it will be
necessary to raise or lower the Z Carriage. This can be done by manually
rotating the Helical Coupler at the top of the Z Axis as shown.