Lowrider V4 core not fitting

LowRider CNC Troubleshooting
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I am building a Lowrider V4 and am having some problems getting the core to move smoothly. The conduit is 1" EMT and measures 29.5 mm. I printed the brace_29p5.stl file so it should be a good match. Looking at how the bearings ride on the conduit, only the edge of the bearing is on the conduit. If I have the tension bolts loose enough for things to move somewhat smoothly, the top of the core hits the conduit. If I add enough tension to get the top of the core off the conduit, then it is too tight and the core won’t move. The bearings do spin freely and are 22mm. I did calibrate my 3D printer before printing everything so I am hoping that isn’t the issue.

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I am not sure where to go from here. Hoping it is something simple. I am going to print another calibration print just to confirm the printer is ok. Any help would be greatly appreciated.

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What size tube/conduit is that? The LR4 uses 1" nominal conduit, 29.5mm OD tube (or 30mm, or 32mm) for the rails. Does that fit properly in the braces?

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The gap in the braces is properly squished, I’d also say the pipes are too small.

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Thanks for the suggestions. The problem turned out to be even more simple… I didn’t put in two of the bearings. Works great now. :grinning:

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Well, that’s something I’d have never thought of. :smiley:

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