Hummingbird Extruder

Hummingbird Extruder

A compact extruder design that has the same form factor and mounting pattern as the Bondtech LGX Lite.

It utilizes the large extrusion gears of HGX-lite gear kit to accomplish high gear ratios and good filament grip.

This design is also published on Github. Check the Github page for instructions.

Firmware Settings

Only tested on klipper firmware:

[extruder]
rotation_distance: 53.494165  # Re-calibrate your own value
gear_ratio: 44:10, 37:17

Changelog

2024-05-08

• Removed the mockup gears in CAD to avoid confusion.

2023-06-28

• Added support for 3 kinds of PTFE tube retainers (4mm OD)
  

2023-05-02

• Increased the maximum distance that the idler gear can bite into the filament. This should prevent the filament from slipping due to the back pressure in the hotend.
• Made the idler arm thicker so it doesn't get bent over time.
• Added a multi-body STL (with MMU in the filename) for printing on a printer with MMU.

2023-04-01

• New hummingbird logo curtesy of #chewy2420 on Discord!
• Added a version without the hexagonal grid for easier print.
• New short idler arm for compact looking (you can still feed the filament by rotating the exposed large gear).
• Removed some plastic and tweaked some dimensions. No part is compatible with previous versions!

2023-01-13

• Initial release