Monday, January 26, 2009


Worm Gear Filament Feed Test Bed

Here's the Worm Gear Filament Feed test bed. Constructed from laser cut acrylic.

The bracket on the right is a spare and the one on the left shows the test bed with gears, axles, O ring springs and an M3 machine screw to test the operation.

The O rings are used in place of springs and are common 16mm ID by 2.5mm. They provide the worm gears with more grip than springs and are both readily available and cheaper. They ideally need to be fitted to pulley wheels or at least collars that keep the axles square to the brackets.

This is something to be sorted that wasn't apparent until I assembled it all. I guess this is why prototyping and testing is useful.

but does it work? :-)
I dunno yet just been waiting for some thin nylon washers to stop the worm gears from twisting due to the O ring's having different stretch characteristics.

I will set up some useful measurements soon and work out a motor mounting/Gear and encoder etc.
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