Semantics. Folks are so caught up with using the exact wording they choose, instead of just solving the problem. Well said
Honestly , I’d not use those, and use zero lash lovejoy style couplers anyway.
I’ve got a $12k gantry style desktop size (large desk), and it been using those style for years, never an issue, and easy to pull motor if the need arises, which it hasn’t yet
@Alan_Thomason well said
The quest for the perfect coupler is a never ending task. They all have their strengths and weaknesses. Some suffer from excessive springiness resulting in backlash and lack of torsional stiffness; while others have very good stiffness but suffer from excessive wear and/or non-failsafe modes of failure. Whoever invents the “perfect” coupler will become very, very rich in short order…
As far as starting the helix farther up goes, depending on how you did the helical cut, an offset plane might be what you’re looking for. And then use that as the sketch plane for the base of the spiral. Harder to do after the fact, but can be done with a bunch of right clicking on things in the time line (and reordering as appropriate).
Great question. I was looking to do this myself. Ended up writing a script for FreeCAD, then importing the STL to Fusion 360. I’m sure there is a way to do the same python script in Fusion, but with a slightly different library.
You just have to put an offset plane on the desired height and then you can place the coil there. No need for python.