The extruder on the TAZ 4 features a modular design making upgrading easy. It’s mostly made of 3d printed parts that are available for download. Our 1.75mm update to the extruder mount and guidler relives pressure and allows retraction preventing the filament from kinking, making loading nice and smooth.
To adjust the inner walls of the extruder mount, start by measuring the filament cavity’s length and radius. The length for the extruder mount is 32.45mm. The filament cavity will need a radius of 3.6 to increase the thickness of the walls.
To accommodate the smaller diameter of 1.75 we’ll make a smaller inner radius of 1.2. Select the outer cylinder hit the “]” key to enter subtract mode and then the smaller inner cylinder.
We’ll need to accommodate the screw that holds the large gear and bearing. We’ll have to subtract portions of the new filament cavity to allow the bearings and screws to fit into the extruder mount.
Make an cylinder with a radius of 4.4mm and fit it through the screw hole.
The next shape to subtract from the filament cavity is the radius of the bearings. Make another cylinder of 9.3mm and center it around the bearing cavity.
Finalize the filament cavity shape by subtracting the two cylinders we made.
Yay, we can now combine the finished cavity shape to the extruder mount! Don’ t forget to read to full installation steps for printing with 1.75 filament on: learn.adafruit.com
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