PowerFlower Belted Extruder

Last crawled date: 4 years, 2 months ago

Introduction
This is a remix of my PowerFlower Geared Extruder but designed for a 220mm (110T) GT2 6mm belt. You can use the same body as the geared version and simply replace the gears with pulleys.
You can find the Fusion 360 source at https://a360.co/2FJM0Hb and https://a360.co/2PggLHU
Details
The pulleys are 100T and 20T respectively (providing a ratio of 5:1). You cannot use a 16T pulley as the distance between the axles has been precicely calculated and is not adjustable.
As with the geared version the PoweFlower is a Bowden extruder designed for 1.75mm filament and an 8mm Hobbed Shaft. In the makefile I have generated and included the main and rear bodies for shafts with common effective diameters. Measure and print the correct parts or change the parameters in the F3D file. The other parts do not change!
x-body-175-60 - For 1.75 filament with 6.0mm shaft ED.
x-body-175-65 - For 1.75 filament with 6.5mm shaft ED.
x-body-175-70 - For 1.75 filament with 7.0mm shaft ED.
x-body-175-75 - For 1.75 filament with 7.5mm shaft ED.
The design is semi-modular. There are two additional M3 holes in the front body of the extruder which will allow you to mount whatever you want e.g. a filament cleaner.
Components
1x M8 Hobbed Shaft (I'm using the E3D Hobb Goblin)
1x NEMA17 Stepper Motor
3x 608ZZ Bearings
1x PC4 M5 Pneumatic Coupling (2x if you want a Bowden inlet)
2x Compression Springs (20mm Height x 7mm OD maximum)
1x GT2 20T Pulley
1x GT2 6mm 220mm (110T) Belt
1x M8 Self Locking Nut
1x M8 Washer
2x M8 Standard Nuts
3x M3x25mm for the rear body and idler
4x M3x10mm (or 8mm) for the stepper.
2x M3x35mm for the idler springs (recommended)
5x M3 Standard Nuts
1x M3 Pozi-Pan for the small gear setscrew.
Final Points
I recommend printing the large pulley with 50% infill as unlike the geared version it will be under slight tension from the belt.
If upgrading from the geared version you will need to adjust your E steps/mm as the ratio changes from 4:1 to 5:1.