The top part broke before I could get the bolt half way into the nut. Oops. For now it’s still functional and I guess I’ll print another one eventually.
Indeed. I led all of the extra to a fat bundle above the two motors. You don’t actually need to use any additional zip ties, though they’re plentiful so why not?
I think the fundamental issue is that step 13 and step 22 show the tubes placed in opposite directions. Obviously it was tried in both orientations and the pictures in step 22 were taken during that testing. Even though step 22 isn’t about the PTFE tubes, it would still be good if all of the pictures were consistent, even if only for those of us who are in the habit of checking that things are identical at each step.
For some reason I had a large amount of stringing in these two screw holes. Some of it kept the spring from seating all the way down, so that the spring compression and hence the tension was much higher on one side. Cleaned everything out with a small flat-bladed screwdriver and everything fit much better.
I had to pull a bearing (the second one in the installation order) and file down just a bit of the plastic behind it in order to get the bearing to spin freely. The smallest hex key was too short to push the shaft out. Amazingly I had great results using filament (some cheap PLA I’ve had for years) to push the shafts out. You have to grab it with pliers just as it enters the hole and push, keeping your thumb over the open channel so that it doesn’t bulge out. I was able to completely disassemble the idler using filament alone.
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