Printrbot Z Hack

thingiverse

Improve your Printer's z-axis performance by replacing its 5/16" galvanized threaded rod, which is not considered optimal, with an M6 threaded rod leadscrew. This upgrade is possible with a pair of captive nuts and a spring, using a printed adapter that fits the original 5/16" hex nut space without requiring any changes to your printer. Benefits include increased steps/mm (3200 compared to previous 2267.7183), reduced backlash, and improved z-axis smoothness. This project is inspired by work on x-axis ends for the Wallace. Required hardware includes an 18-8 M6 threaded rod, M6 brass hex nuts (for smoother operation than standard nuts), a 9mm OD 28.5L compression spring, and vinyl tubing to attach the rod to the z-motor shaft. Tested on a Printrbot Jr., this modification may also work with other Printrbots.