Quote Originally Posted by Donziboy2 View Post
What happens is that there is some play in the threading of the nut so you can get a small amount of movement, depending on the nut and rod that could be enough movement to cause gaps during printing. If you thread the rods into the nut traps it adds threading to the traps and increases friction, reducing the chance of unwanted movement. I have seen several examples of people making new nut traps that have 2 nuts and a spring in the middle to prevent the backlash.
Ok, thanks. That's good info. I will keep an eye out for that and print new Z nut traps if I see any sign of banding.