![]() I don’t have the primo or that MPCNC put together anymore, so I can’t say for sure. This did work quite well for me, but it was for the original MPCNC version. ![]() I can see there are some good possibilities for using this idea for other purposes. I showed this to a friend & he wanted me to print him one to use as a mini jack. That way I could put some index marks around the circumference to get a better idea of how much it is going up or down. I was just thinking I could probably make something like a knurled socket open at the top & bottom & leave one on each of the turnbuckle. My 32mm plastic wrench adjusts it pretty good so far. If you add the 1/2" EMT to center, you probably can not use that. If you are talking about the horizontal hex hole in the middle of the nut, that is in case you want to adjust it using a 5mm allen wrench, screwdriver or whatever fits. 27mm might be too short to use with the threads. I also took the liberty of remixing your Lock-CornerC in openscad to add the threads with an optional Height adjustment. That clearance is adjustable in openscad. There is almost no play in the threads & when you tighten the bracket even just a little bit there is no play. The clearance that worked best for me was. There is also an image showing the variables that can be changed on the turnbuckle. Here are some photos of what it looks like so far. I have an option to have the threads only at the top like the original design, just in case this does not work out. I was tired of using index cards on my corners to get it level. I need to make a couple more small tweaks to the design, but I am pretty happy with how well this initial test went. I had enough room inside the turnbuckle to add a 1/2" EMT which should make it quite strong. I was originally going to make this design the same way the original designer did, but then realized a turnbuckle would be fun. With a Pitch of 4, turning the nut 1 revolution will raise or lower it 8mm (4mm below the nut & 4mm above). I used a thread angle of 40 degrees since that printed a lot better than the default 30 degrees. My biggest hurdle was getting the threading the way I wanted & found an openscad screw threads library that worked well for me at. ![]() I have been looking for an easier way to adjust the level of my corners & came across this idea: The problem was I wanted to use my same corner styles, so I set out to remix this in openscad. ![]()
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