PowerFlower Belted Extruder

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.

The belted version is quieter and doesn’t suffer from degredation (for gears printed in PLA as opposed to a more suitable material such as Nylon) but has no additional advantages.

You can find the Fusion 360 source at http://a360.co/2W1MYH2 and http://a360.co/3aI4nbD

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 PowerFlower 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)

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.

1x M3x12mm for the Tensioner.

2x M3 Flat Washers for the Tensioner.

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 adjust your E steps/mm as the ratio changes to 5:1.