Geared extruder v.2 by RomanST

Last crawled date: 3 years ago

Update 04/26/2016: I will not modify this design anymore, there is a STEP file attached, feel free to alter the way you like.
Update 02/09/2015: Refreshed all stl files to match latest CAD file. Older stl files removed, use DS Mechanical to open older source files if needed...
Update 28/08/2015: Now tested with TPE (flexible filament). Uploaded new DS Mechanical file (v12) with new gears, if you are using old ones - leave it as is...
Update 28/07/2015: Left a bit more space for idler bearing, still there is a small chance that you'll need to cut some plastic during assembly to get a good grip.
Easy filament change quick release geared bowden extruder. Just push the idler arm and pull filament outside, then insert new one and release. That's it! Gear ratio is 1:3.54, for 1/4 microstepping and 1.8 degrees stepper it's 150 steps/mm.
Vitamins needed:
6x 10mm M3 allen head bolts
2x 30mm M3 allen head bolts
4x M3 hex nuts
1x 50mm M5 hex head bolt (axis)
6-8 M5 washers
1x 30mm M4 bolt, at least one M4 hex nut, some M4 washers to adjust spring tension
~ 25mm spring
MK8 gear for driving filament
2x 625ZZ bearings
1x 608ZZ bearing
Works fine with ABS/PLA/Nylon/TPE (http://www.youtube.com/watch?v=9IM2rGlbEXE, http://www.youtube.com/watch?v=E93ouMbCUXw).