I found some of my print failures were related to the hot end hanging

3D Printing
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1

I found some of my print failures were related to the hot end hanging up on the print…which was wierd as the print looked pretty flat (no overextrusion). Closer examination showed that the extruder had some play in the mount. One screw wouldn’t tighten up because the nut was spinning in place, and honestly, I probably drilled the holes a little wonky.

I disassembled, and used some toothpick pieces to keep the nuts from spinning, I then also wrapped a small rubberband in the groove for the J-head mount. Upon reassembly, the nuts didn’t spin, and the rubber gave the screws a good surface to bite into. Id’ also imagine there’s a little flexibility in the rubber, allowing it to move if something catastrophic happens.

2

How I fought the same problems until I found their source… Then used a lot of plumber’s PTFE tape to just fill all the gaps (especially the large gap of the groove of the j-head mount!!!) - seems to hold well enough.

3

When I mounted my E3D it wouldn’t clamp tight in my wades block. Inserted a 1/4-20 flat washer between the block and hotend to solve it. Perhaps some mounts are too deep.

4

I have printed a spacer for that problem before. About 1/4 inch and made the hole tapered so the filament would feed well.

5

I forgot, I drilled out the top of the mount so that the bowden fitting could screw directly to the e3d…

6

Thanks, I’ll be sure to keep an eye out for this.