Elegoo Neptune 4 Z-Belt Tensioner

Hi,

The Z belt on my new Elegoo Neptune 4 is quite a bit loose. After testing this model https://www.printables.com/model/592384-elegoo-neptune-3-and-4-max-and-plus-belt-tensioner I wanted to design my own solution. This model is the result.

It is intended to use on a printer without a mounted filament spool holder in the middle of the upper profile. The filament sensor can be mounted on the front side. I use it with a spring but just using some M4 nuts and a fixed "tension setting" should also work.

Printed in PolyTerra PLA on Elegoo Neptune 4 Pro with:

Layer: 0,2 mm
Infill: 20% Cubic
Wall Line Count: 5
Support: no

assembly - what I used:

filament sensor: 

• M3x12 screw (original)

tensioner mounting: 

• 2x M4x12 & washer & T-nuts (original)

tensioner:

• 1x M5x60 screw
• 2x M5 washer 
• 1x M5 nut & 1 M5 wing nut
• 1x Nylon washer
• 1x GT2 pulley
• 1x M4x45 screw
• 3x M4 nuts
• 2x M4 washer
• 1x spring
   

Happy printing!