CR-7 T8 lead screw flange holder adapter (螺桿螺母法蘭轉接座)

thingiverse

CR-7 uses M5 thread rod for z-step. You might want to change it to lead screw. If you want to replace CR7's toothed bar with a leadscrew, here's what I do: 1. Buy the leadscrew; know its step. 2. Ream the hole - 10mm is suggested. 3. Get the CR-7 firmware. 4. Print this adapter. Benefits of this adapter include: Firstly, it doesn't require cutting off the flange like Allen's original design; all four screws can be secured. Secondly, it's shorter than other designs in the community - longer ones tend to wobble more. Finally, while my design allows for a flat print, which might cause the axis to shift. I recommend printing it upright.