I rebuilt the extruder on my Delta #RepRap again. Trying different things to find something that works for me. This is a cable-laced short bowden tube with no 'real' connectors. Quick and dirty, but it seems to be working well so far.
The cable lacing is where the hold-it-all-together should happen. This is with Spectra fishing line. Same as I used for the drive-line. Low stretch. Should keep the two halves from being pushed apart.
Boom! Wonderful printing all of a sudden.
Installed. The idea is to balance the weight of the motor over the effector so the printer doesn’t have to sling all that weight around.
I used some self vulcanizing rubber tape to try to get some traction on the tube. It should also stiffen up the joints a bit so there is less flex at either end and more in the middle.
This is the prior iteration. The nylon kept wanting to stretch so I kept twisting the extruder around to tighten up the cable lacing. 2.5 full turns here! The nylon also dug into the plastic a bit as well.