Superfly Extruder
A Compact BMG Conversion
*Update (10th May 2021) - Added a higher strength tensioner, more suitable for high-speed printing, see details in "Printed Parts"
The Superfly is a compact extruder designed to reuse the excellent dual drive gears of the beloved BMG extruder. As with the BMG, the Superfly is a dual-drive geared extruder with a 3:1 gear ratio. It is designed with the following characteristics in mind:
compact and lightweight
short filament path
balanced center of gravity
easy to source hardware
support both NEMA 17 and round NEMA 14 motors
easy to print
Please see the project GitHub Page for more detailed information on the Superfly including additional assembly instructions and images
Parts
You will need the following parts of your BMG:
the drive shaft with the large plastic gear attached
the drive gear, this is the gear that is on the drive shaft
the idler gear, its shaft, and the two needle bearings inside, these are the parts that were on the BMG's tension arm
2 x MR85 bearings that…