May 7, 2024
Description
If you don't want to mess around with heat-set inserts, you can use longer M3 screws with 2 nuts instead.
The bowden clips & collets can be purchased here:
https://www.amazon.com/gp/product/B0C7QBHN9B
The collets could be modeled and printed instead (there are many models around). The clips however have pretty fine details, I'm not sure they'd be a good candidate for printing.
Use any filament you like. The two STLs have been oriented for printing.
Put in place the M3 heat-set inserts. They go in the bottom side of the bigger (lower) part. The hole narrows from 4.2mm for the inserts to 3.3mm for the screw to pass through. This way there's a lot of plastic being squeezed by the insert when the screw is tightened, instead of it relying only on side grip. This isn't really important here as there's not much load put on them, but in general this is a far superior way of using inserts,. It's not always possible, and you often need longer screws, but it's usually worth it.
Insert the 6 clips into the top part through the tight rings; there's a small chamfer to assist with this. They should clip into place and disappear into the part, with the exception of their upper ring.
Install the top and bottom parts on the enclosure lid. Mind the orientation of the bottom part, there's a bend in the tube paths to have the tubes curve towards the extruder. (2nd photo)
Insert the PTFE tube(s) through the top openings. They should go through smoothly when the clips are all the way down. When you see the desired length of tube appear inside the enclosure, pull back on it a couple of millimeters. This will result in the clip rising up and locking the tube in place. Insert the collet around the clip; this will secure the clip in the up position and prevent the PTFE tube from moving in either direction. (1st photo)
To remove the tube, simply remove the collet and push the clip in the down position, then pull on the tube while keeping the clip depressed.
License:
BSD License
7
martona
