- ramajacParticipantMay 31, 2016 at 3:30 amPost count: 11
Just asking why to use a printed coupling, instead an aluminium one. The diameters needed are pretty common, at least here in EU. And also I have some replacement couplings with this size from other machines I built before.
Has the printed one something especial? Is just to save buying another part? So the machine is “more mostly printed” 😛 ?? Or am I missing something important about the coupling??
Thanks in advice!vicious1KeymasterMay 31, 2016 at 6:18 amPost count: 2649
Any coupler will work fine if you pay attention to its loading. If you use one of the standard 3D printer couplers you are putting a spring into the z axis system and introducing a great amount of backlash/slop. I have designed it so you can minimize this with the 2 piece mount. That being said my printed one is also a good place to be able to make z axis adjustments. It is a coupler and knob all in one.
The other reason I did it is in the US the 5mmto 8mm standard couplers don’t fit a 5/16 rod very well, and a printed one is cheaper.
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