Filament Load buttons for BLV MGN Cube / Duet2

thingiverse

I wanted to connect two hardware buttons to my printer so I could load and unload filament with ease while keeping everything stress-free and nice. To do this, I designed a bracket for 2 buttons to mount between the back top extrusion and the belts near the extruder. The first design was for 16mm momentary switches like those in the BOM of the BLV-MGN-Cube. However, I ended up using a second version designed for 12mm momentary switches. In addition, you will need some leftover parts from your printer build: - wire - 2 connectors for your Duet board - 2 M5x8 screws with T-Nuts You'll need to connect the switches to E0-Stop/GND (right connector - Load Button) and E1-Stop/GND (left connector - Unload Button), as shown in the wiring picture. After completing the wiring, turn on your printer and navigate to DuetWebControl. Then, insert the following lines into your config.g: ; Assigning Switches to E0=Load and E1=Unload M581 T2 E1 S1 C0 ; Runs trigger2.g file when pressed - Unload Filament M581 T3 E0 S1 C0 ; Runs trigger3.g file when pressed - Load and Purge Filament You'll also need to create or copy the files trigger2.g and trigger3.g into the directory of the config.g. The files to copy are provided with this thing, along with a .txt containing all the necessary GCode to create those files in working condition. The trigger-files must use numbers 2-9, while trigger0 and trigger1 are reserved for emergency shutdown or pause. Don't change the titles of these files to lower numbers than 2, even if you're tempted by your love of order. Since my Bowden is around 800mm long, adjust the values in the triggerX.g files as needed if you have a significantly longer or shorter setup. The usage of each command is commented on each line. Feel free to use your own load-macro by uncommenting the M98 command in trigger3.g, but be sure to check that you're using the same filename. If you'd like to explore alternative solutions, take a look at https://www.thingiverse.com/thing:3584561, which mimics the M600 command in a cool way.