Printrbot and Wallace Z axis stabiliser

by aliekens, published

Printrbot and Wallace Z axis stabiliser by aliekens Feb 24, 2013
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Stabilizes potential wobble in Z axis rods.


Print two of these, add 608 bearings, fit a rod and mount on top of the vertical rods. The thing assumes the screw and smooth rods are about the same height (driver rod may be about 5mm higher. This is not to be used as a handle as it is loosely installed on top of the Z axes.

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is the problem fixed ?

this setup will cause a wobble in your prints, not make it better. The reason is simple: a leadscrews and threaded rod has a bow in it, some more (threaded rod) than others (milled leadscrew). If you fix both ends of the screw, you will force the nut-part to move in the XY direction. Your Z-rods will stop some of that, but not all. If you leave the top of the screws unconnected, you will see move these in circles; that is fine, it means that movement is not going into your print.