Hello folks. I have an Ender 3 to which I've added a second Z-axis lead screw with the two lead screws coupled together at the top with a 6mm GT2 belt across the top ends, driven by the Z-stepper at the bottom end of the original Z-axis lead screw. I would like to decouple the lead screw from the stepper and I'm considering two options:
1) Slide the motor over, add a bearing support to the bottom of the lead screw, and connect the motor to it with a belt loop and pulleys.
2) Place the motor in the center of the top horizontal beam and loop the existing belt around the motor pulley, using idlers as required.
Intuitively I would think that having the motor at the top would provide a more direct and equal connection to the two lead screws, but I've learned my intuition is frequently wrong. What do you folks think?
