Easy and efficient Z-axis anti backlash for Prusa i3

This part eliminates any backlash that may occur on your Z-axis. You can adjust the load according to your needs by changing the distance between the two nuts.
This is a must have if you are using a lightweight extruder like a Bowden extruder.

Required parts (for each side):

1x M5 Nut
1x Compression Spring

My compression spring is a 20mm x 9mm(out). I compress it to 15mm but that will depend on your spring strenght.
The step model is provided, feel free to modify this to suit to you