Printrbot offset z axis nut:Less Wobble!
thingiverse
To straighten my Printrbot LC V1's threaded rods, I created parts to offset the nuts from the x-axis center. The Printrbot stepper and smooth rod mounts indicated that both rods should be even. After implementing this solution, I observed less wobble since the threaded rods no longer pushed the x-axis forward and backward. Although not a perfect z-wobble fix, it significantly reduces it. This modification should work for acme rods with nuts of similar size, as long as you may need to trim some of the tight-fitting ribs to press them onto the x-axis.
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