I started my 3D printer upgrade series with the quick tool change https://www.thingiverse.com/thing:3369444 which is still one of my coolest upgrades. However, it missed something because if you change to a different tool, you always have to place the hot end somewhere. With the swappable hot end it is possible to disconnect the whole hot end like the Ultimaker printers. Another advantage of this, besides being able to disconnect your hot end, is that you can use different hot ends for different materials or nozzle diameters. After I came up with this idea I found a couple of similar approaches but nothing with which the bowden tube itself could be disconnected.
Another cool thing: if you use a laser engraver, you don't have to add an extra wire or switches to your control board and you can just connect it directly. The coming weeks I will work on this.
If you don't want to get through all of this trouble and risking breaking down your machine, but you want this upgrade: I am thinking of selling a set on my website if enough people want this. This set will be included with the cable which can be connected to the control box so you don't have to cut anything. Let me know if you are interested by leaving a comment!
Please consider buying me a coffee if you liked it or helped you :) http://ko-fi.com/properprinting/
eSun Carbon fiber reinforced nylon
Like with the quick tool change, the material must be strong. That's why I have printed it out of this carbon fiber filament, besides that it looks good. Other strong materials will probably do too.
Swappable hot end
Depending on which type of holder you choose you need:
What you need in general:
I have placed a pdf with the wiring diagram which I recommend using. You can of course do it differently if that suits your purpose better.
If you press the collar onto the tube, use a bit of sanding paper to make it flat and use a 2mm drill to remove the burr from the inside of the tube. I did not do this at first and the material was blocked at the point where the two tubes meet in the connectors.
Disclaimer and warning
Use this thing at your own risk. It works for me, but you are modifying the hot end of a 3D printer. I cannot be held responsible if anything goes wrong and messes up your print, machine or if your house catches fire. Use common sense and always wear proper protection when using a laser head, grinder, drill etc.
Make sure that every time you print that the connector is tightened! Otherwise it will come loose while printing.