AM8 Nozzle Cleaner (Customizable)
Description
Since I had the cable chain next to the bed I had the problem that while idling oozing filament dropped into the cable chain. I wanted to fix that, but somehow ended up creating a nozzle wiper for the printer, which kind of does the job. Sometimes filament still drops into the chain, but it is hardened and no longer a harm for the wires. Maybe I will invest more time into the model in the future to create a ramp or increase the surface over the chain, but for now I am pleased with the result. There is an inverted V slot inside the mount, where the rubber can be pushed in from the side. I used a kitchen spatula from a dollar store. Basically a plastic handle, which is now a back scraper and the silicone spatula which I cut into shape to fit using scissors. Since it is made for kitchen usage it is perfect for the job and also heat resistant and flexible, so it can be pushed away by the nozzle. To "configure" the proper cleaning action I adapted the start gcode of my slicer. After homing and before the priming commands, I simply added the following line block four times: G1 F2500 X-16 G1 F2500 X-6 Since the homing position is not on the bed the X position is negative. You may check which value yours are, as they may depend on the firmware you used. I compiled mine, so my values are made specifically for the printer. Just home your AM8 and read the display. It should show some negative value for X. That value corresponds to the -16 in my example. By adding 10 as the wiping distance to it, you get the other value. -6 in my example. These lines move the printer 10mm on the X axis and back to the origin. The travel should move the nozzle over the rubber and back to clean any residue on it. <b>Do not add the lines to your end gcode!</b> This could end up in a disaster, as you need to lower the bridge to reach the cleaner and your bridge may crash into your last print. If you are familiar with compiling the firmware, you can create a G12 command macro for the action and call G12 without any arguments I designed the cleaner for a printer with a glass surface and E3D hot end. The overall size was limited by the cable chain height, so be warned that you may need to adjust my design to fit your printer.
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