M3 flanged nylock nut holder for titanium X-gantry tube
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M3 flanged nylock nut holder for titanium X-gantry tube
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Rartrig V-Core 4 and 3 use an aluminium support bar for the x gantry. Changing the alu extrusion to a square tube made of titanium reduces the bimetallic bend.
When installing the ti tube, something has to keep the nuts in place when tightening the rail screws. It is possible to use a very long and thin wrench for that, but then it won't be possible to re-tighten the screws once the gantry is assembled. Also, there are some designs that use a printed skeleton to hold the screws in place. The risk with such a solution is that the structures between the screw holes start shaking or resonating. While I am not sure whether the shaking is a real problem, I nevertheless decided to use a nut holder that only has a structure right where the nut is, i.e. it does not have any extra alignment structure between the holes.
These holders can be pushed in place with a (threaded) rod. With a couple of nuts at the end it is possible to push/pull the holder in place.
The holder has space for a flanged nylon m3 nut.