Two Bit MK8 Extruder

youmagine

Print the STL file to receive "upper feed", "upper tensioner", "lower tensioner". 1. Use a 2mm drill bit to clean up the two holes through which the filament passes, one in each part. 2. Clean up the three vertical holes in the upper parts with a 3mm drill bit. 3. Use a 2.5mm drill bit to clean up the two vertical holes in the lower part and tap them with an M3 tap. 4. Clean up the hole for the bowden tube with a 4mm drill bit, then tap it with an M5 tap - you might want to drill the hole slightly deeper than printed unless you have a bottom tap. Screw in the pneumatic adapter. 5. Place the bearing on the lower part and assemble the upper part using a 12mm M3 screw. 6. Screw the assembled tensioner part onto the motor with a 16mm screw, but don't over tighten. 7. Mount the Mk8 gear onto the motor - align it with the height where the filament passes through. 8. Screw the feed part onto the motor with one 16mm screw. 9. Insert the spring. 10. Hold both parts together while compressing the spring and then screw in the last 16mm screw.All done! Suggestions for mounts are welcome, I've just slapped them on top of my large printer for now.