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SeeMeCNC.com makes one of the best pinch extruders out there. It handles 3mm and 1,75mm but by default comes with the 1.75mm setup. With these parts you can adapt a 3mm bowden tube connector. It doesn't require any tools so you can switch back to 1.75 easily.
and the 3mm connector:
Print the SeeMeCNC extruder mount:
-Screw 3mm bowden connector into the nut.
-Slide the peg up through the extruder bowden plate and twist the nut on.
-Bolt the extruder plate onto the extruder on the side for 3mm.
-Mount to the printed extruder Ultimaker bracket
-Wire up (I made quick disconnects so I could go back to stock)
This extruder extrudes in reverse of the stock one so you need to edit your marlin configuration file.. the following line should be "true"
define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
Run Cura first run wizard to calibrate.
SeeMeCNC 3mm bowden extruder drive adapter by chasmaker is licensed under the Creative Commons - Attribution license.
So what's this mean?
We're sure chasmaker would love to see what you've printed - take a photo and share it on Thingiverse as a Make.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. You can also download the Thingiverse Mobile app (available via Google Play and Apple App Store) to take a photo and upload your Make right from the app!