Review on 🔧 Upgraded Ender 3/Pro/V2 & CR-10/Tornado 3D Printer: 2-Pack T8 Anti Backlash Spring Loaded Nut, Brass Nuts with Elimination Gap for 8mm Acme Threaded Rod by Athenasby Whitney

Okay, imagine a ruler hanging 10 inches over the edge of the table, it's easy to slide the ruler with your finger and deflect because of the resistance of the ruler at 10 inches is very low. Now if you pull the ruler in so that most of it touches the table and only extends 1 inch over the table, it's very difficult to distract. **** Well it's a glueing issue, not only do you have to loosen the two bolts holding the bearing/backlash nut, you also have to loosen the two adapter bolts that hold the lead screw to the motor and the bolts that hold the motor Mounting plate at a 90 degree angle. Unscrew all six of these screws. Make sure the bearing/spacer nut is well lubricated and lower the Z stage all the way to the limit switch, making sure it is against the limit switch when tightening. **** Why? Because the lead screw flexes the least in this position, we want the placement of all elements to facilitate correct travel of the limit switch. Like the ruler mentioned in the example above, the system at the other end doesn't care, the lead screw will flex and won't resist as far, but closer to the limit switch when it gets short, that's where everything should be. the most loyal.