Thingiverse
Filament pusher
por virtualguy
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Simple filament pusher using a dc reduction drive from Jaycar, a couple of microswitches and a skateboard bearing. The drive gear is a brass shaft coupling hobbed with a M4 tap as per: http://reprap.org/wiki/Wade's_Geared_Extruder. Simple design just made to suit what I cound get hold of. BOM and photos to come once I get it off the printer!
As the printer requires more filament the microswitch is depressed and the motor starts supplying more until it catches up and then turns off. I chose a slightly smaller motor which runs much quieter and runs at 70rpm from 12V.
Set up with a second microswitch wired to machines E Stop so if you finish the reel or something bad happens things stop!
Video if it in action:
http://youtu.be/An926fPPbcY
Please post if you want the Solidworks files
As the printer requires more filament the microswitch is depressed and the motor starts supplying more until it catches up and then turns off. I chose a slightly smaller motor which runs much quieter and runs at 70rpm from 12V.
Set up with a second microswitch wired to machines E Stop so if you finish the reel or something bad happens things stop!
Video if it in action:
http://youtu.be/An926fPPbcY
Please post if you want the Solidworks files
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