Bowden Guillotine

thingiverse

This is a Customized Version of Botmaster's Innovative Razor Guillotine, Specifically Designed for Cutting PTFE Bowden Tubes. It Produces a Clean, Square Cut Without Any Crushing of the Tubing. You Will Need: 2 Four-Meter 50mm Hex Head Shoulder Bolts 2 Four-Meter Nuts 1 Three-Meter 15-20mm Screw 1 Three-Meter Nut 2 Springs 1 Single Edge Razor Blade I Cannot Provide Specifics on the Springs Because, Like Botmaster, I Used Springs From an Assortment That I Already Had. The CAD Files Can Be Modified to Use Different Hardware in Non-Metric Sizes Pretty Easily. After Printing the Base, Chase the Tubing Hole With a #19 Drill. A 4mm or 4.1mm Drill Should Also Work. The Size of the Hole Can Readily Be Changed in the OpenSCAD File. It Could Even Be Adapted for a Bowden for 3mm Filament. The Razor Blade Slides Into the Carrier From the Side Before Assembly. The Shoulder Bolts Are Threaded In From the Top, Engaging the Nuts at the Bottom of the Base. I Added the Fence Knobs For Two Reasons. It Makes Assembly/Disassembly Easier When Replacing the Razor Blade (Which Will Be Seldom If Ever Considering You're Only Cutting PTFE). More Importantly, It Also Acts as a Spacer So That the Edge of the Razor Blade Is Never Exposed. Assemble the Fence Screw By Placing a 3m Nut in the Recess and Tightening a 3m Screw From the Other Side. There Should Be Little Chance of This Unscrewing in Normal Use. If You Customize This With the OpenSCAD Design, You Will Need the Original Base STL from Botmaster's Original Razor Guillotine.