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Compress the anti-backlash nut and thread it onto the leadscrew. Once the threads are fully through the nut, release the tension on the spring.
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Thread the nut half way up the leadscrew.
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Using (4) M3 x 10 socket head screws and (4) M3 washers attach the stepper motor to the base.
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Slide the small side of the coupler on the stepper shaft and tighten the set screw on the bottom half.
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Raise the Z yoke and slide the leadscrew up through the yoke.
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Set the leadscrew in the top half of the coupler and tighten the set screw.
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Slide the yoke half way down the Z tower so it is flush with the top of the anti-backlash nut.
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Using (4) M3 x 10 socket head screws, attach the Z Yokes to the anti-backlash nuts.
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If your Z towers are still loose, or not aligned with the leadscrew, now is the time to align and tighten them.
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