Boiler I’m going to subscribe. You talk of making a filament extruder, people used to think filling my own ink jet cartridges was over the top. Too bad you live so far away would like to see what you are up to. Post some pics, videos so we can see what you have shakin!
Cool. I'm not ready to embark on the filament extruder just yet... I have too many other projects ahead of it that are a tad bigger, but who knows, if I get a couple 3D printers really singing then maybe I will need to.
My goals are to primarily give me a means of fabricating prototype parts for my motorcycle builds so I will eventually move into printing the tougher materials like ABS, Nylons, and ULTEMs. My end goal is to be able to even print my own body work and fenders for my bike builds.
I found a cool blog by AK Eric documenting his C-Bot DIY printer build and it's upgrades. Here's the link:
AK Eric's C-Bot Build Blog
Regarding the DIY filament extruder, here is a DIY kit I came across:
Filastruder
There are things about the Filastruder that I don't like so I would have to mod it's design and/or build. In my limited research there are DIY extruder plans online as well, but I didn't dig too deep into it yet. Just nice to know it's a possibility since raw pellets are 30%-75% cheaper than the cost of purchased filament. BUT the filament can be a major source of issues in 3D printers so it could also be a path to frustration and crappy prints.
Filastruder is also a US source of the SILENTSTEPSTICK stepper drivers featuring the Trinamic TMC2130, the Duet WiFi control board, DUEX5 expansion board, and the PANELDUE 7i 7" TFT touchscreen LCD panel. Those components would build one Sa-Weet 3D printer!
The Duet WiFi and DUEX5 will allow you to run up to 7 extruders via support for a further 5 stepper drivers and heaters on the DUEX5 expansion board.
The firmware includes support for mixing nozzles and remapping axes to use high power external drivers.
That power allows you to run a standard dual extruder head and one of these Diamond extruders:
OR two of these 3-into-1 Diamond extruders with a spare stepper driver position:
I'm personally leaning towards the 3-into-1 or 5-into-1 head for doing multi-color stuff or more detail oriented work since the tip is 0.4mm. Combined with a larger orifice dual extruder you can print far more complex parts needing supports. The large dual extruder can print off low cost PLA supports at a higher speed, then put in layer of HIPS dissolvable to allow easy removal of the supports from an ABS/Nylon/ULTEM part while minimizing the part cost.
Swap out the filaments and you can print off multi-color figurines or models.