Printrbot Simple Filiment Guide and Z Axis Stabilizer with Bearings

thingiverse

This has to be one of the most indispensable accessories I've created for my 3D printer. I was pleasantly surprised at the significant improvement this made to the quality of my prints. This accessory is specifically designed to be used in conjunction with a desktop spool roller, like the one showcased in the second picture (http://www.thingiverse.com/thing:453542). The clever pulley system does an exceptional job of keeping the filament from binding, allowing the print head to move more smoothly and effortlessly. Instructions This build requires two 8mm 608ZZ greased mini ball bearings, known for their impressive precision and reliability. 1. Print 1 pulley, 1 z-stabilizer, 4 washers, and 2 axels. I employed a 0.3mm layer thickness and a generous 50% infill, opting against support and brims. I crafted the tolerances very tightly on the pulley; you might need to adjust the scale depending on your printer's precise calibration. Press one of the ball bearings into the central hole in the pulley from the side featuring the larger opening. I utilized a watch crystal press to achieve a snug fit. Next, position the z-axis stabilizer by seating the two smooth z-axis rods from your printer into the holes located at the bottom of the stabilizer. Subsequently, insert one of the axels into the bearing/pulley assembly. Securely attach 2 washers onto the axel/bearing/pulley assembly; place them on each side of the pulley. Now, gently slide this entire assembly into the upright slots located within the z-stabilizer. Ensure that the washers and pulley remain safely contained between the vertical slots. Following this, insert the other axel into the remaining ball bearing. Add 2 more washers onto this axel/bearing assembly; carefully place one on each side of the bearing. Then, gently slide this entire assembly into the upright slots located above the pulley assembly within the z-stabilizer. Verify that the washers and bearing are snugly positioned between the vertical slots. Ideally, the bearing should remain perfectly centered above the pulley. Next, expertly thread your filament through the narrow opening situated between the pulley and the upper bearing as demonstrated in the pictures provided. I use mine without relying on any adhesive materials; gravity is the perfect agent holding everything securely in place.