Replicator 2 & 2X, Z axis Ballast (FIX)

thingiverse

The Replicator 2 and 2X Experience Major Issues with the Z Axis Due to Play and Stickiness. The Z axis on these models exhibits significant play, movement, and stickiness, leading to uneven print layers. You'll notice this issue when you jog the Z axis up about three-fourths of the way. If you apply pressure from the bottom while lifting the build plate, you'll feel the play. Although it's minimal, its impact on your prints is substantial. The cause of this stickiness lies in the bushings used in the Z axis. If linear bearings were employed instead of bushings, these problems would not arise. The Ballast Solution: A Weighty Problem Solver The Ballast was designed to accommodate additional weight on the build plate, forcing the Z axis to drop down with each layer as the screw rod lowers. By adding weight to your build platform, you can eliminate inconsistent layers while printing. I utilized loose coins in my ballast for added weight. You can use coins or steel ball bearings in yours, but make sure not to include sand or water in the Ballast. To implement this solution: 1. Remove the back plate that sits on your build platform. This plate features a red Makerbot logo covering the threaded rod and two screws holding it in place. 2. Once removed, insert the printed ballast into the cavity previously occupied by the back plate. 3. Ensure the printed ballast's groove aligns with the threaded rod, preventing any potential contact. 4. Reinstall the back plate and secure it using the two screws. 5. Jog the build platform up about three-fourths of the way on the Z axis. 6. Fill the printed ballast with your desired material – either loose coins or steel ball bearings – adding a little at a time to maintain even weight distribution. Make sure both sides receive an equal amount of weight. 7. Test the build plate by pushing it up from the bottom and releasing it. If it doesn't drop down on its own, add more weight in increments until it does. Be cautious not to overfill the ballast, as this may damage your Z axis stepper motor. 8. Once you've achieved the desired weight, level the build plate again – an essential step for accurate prints. 9. Perform a test print, and if your horizontal lines are even and consistent, your Z axis is calibrated.