Basic Automatic Filament Switch v.01
Description
WARNING: This is an experimental project. I rely on my printer's tight fit so I can place the bolts needed. Might not work with your printer without modifying further. DISCLAIMER: Use it at your own risk. I will not be responsible for anything happens using this design and I don't provide support. BAFS is a basic automatic filament switch, it only does one thing: switching filaments. Features: 1. Modular design, i.e. you decide how many ports you want, print accordingly. 2. Only 1 port needed from the printer 3. Redundant design, if one of the motor port stop working, most likely it won't affect the other. 4. Cheap, it uses commonly available parts. BAFS is a great and affordable way to learn and understand how multi filament / multi material 3d printing works. Be aware this design has the same problems/challenges as similar design using single nozzle and y-splitter: jams, clogging, color bleeds, etc. I don't have the solution for those. You can try similar approach like filament cutter, purge tower, etc. To use it you need firmware support, unfortunately, currently there's no official firmware support. I have it work only for my printer with my own modification. If you're interested, you can find it on github: https://github.com/yonitjio/Marlin-A8V2/tree/2.1.x-es You also need to have additional electronic module, to translate printer's servo/pwm signal to the switch. I use arduino uno. Also even though it's modular, it's better to plan ahead to minimize costs, for example if you plan to use 4 filaments but want to start with 2 first, it's better to prepare the shaft and bolts for 4 filaments from the start. This is because the you need longer shaft and bolts for more ports for the filaments. Non printed parts: - Servos (I use MG90s and MG996R) - M3 bolts and nuts - M4 bolts - Long M4 bolts and nuts - Bearings 625zz, 623zz, u604zz - Extruder gears - Grease - Microcontroller, arduino or whatever you choose to translate printer's signal to the switch's servos. This is only for the switch, you still need at least a y-splitter, etc. Use whichever work for you. You can search it on thingiverse, printables, etc.
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