monoprice dual extruder / flashforge creator pro z-wobble fix

thingiverse

After a year, my printer began to exhibit z-wobble. The two rods were pressed in tightly at the top, while the bottom barely grasped them, with a significant 35mm gap between them. By printing pairs of spacers, I was able to lock the rods firmly in place at the bottom. I disregarded the bearings in my photo, but I happened to have some spare 10mm x 26mm x 8mm bearings on hand. To make the most of these, I opted to shorten my bosses and use the bearings as a solid support. To access the z-axis, start by unscrewing the top and bottom plates and unplugging the z-motor underneath. Next, remove all three outer plastic panels and take out the screws from the base platform, leaving only the front ones in place. This will allow you to tilt the platform back, making it easier to slide the z-axis out. Don't forget to disconnect the two connectors from the pcb on the platform. One final recommendation is to remove the bearing at the top of the z-axis. I believe that any out-of-round issues with the thread could be transmitted to the print if left in place. In a well-designed system, the two rods should define the position, not the motor. Take note of how the Prusa i3 works – its posts are fixed firmly, while the z-axis motors appear to float freely.