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GT2 Main Shaft Pulley for MKII 5 Watt 3D printable Wind Turbine
GT2 Pulley 75 TeethOther
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This is a replacement for the gears in the MKII 5 Watt 3D printable Wind Turbine.
It uses a 80mm GT2 (2mm) timing belt, an aluminium pulley with 28 teeth for the stepper motor shaft and an printed pulley with 75 teeth for the main shaft.
The ratio is 75:28 = 2.68.
Added a 74 teeth variant. with a ratio of 74:28 = 2.64. This one can be printed without a raft. The 75 teeth variant was little bit to tight with resulted in to much friction.
The main reason for this replacement is that it reduces the gear noise.
I printed this in ABS with the following settings:
- Highest Quality
- Layer Height: 0.06 mm
- Print speed: 45 mm/s
- Outer wall speed: 20 mm/s
- Travel speed: 120 mm/s
- Infill: 75%
- Build Plate Adhesion Type: Raft (so you don't get an elephant feet on the teeth)
The gear is based on this OpenScad design (http://www.thingiverse.com/thing:16627). I have included the scad file with the parameters I used.
Materials and methods
Other non-printed parts:
GT2 Timing Belt 6mm wide 2mm pitch, 180mm, 90 teeth
GT2 Aluminum Timing Pulleys 28 Tooth 5mm Bore
M3 Grub Screw
(You only need 3 Grub Screws)
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