Modified base to allow easier access to drive gear set screw from behind the spring.
Addeded CTC version. CTC uses a larger diameter spring so the hole has be enlarged to fit this bigger spring.
Update 7/20/15, the other day I made a video on how to install this.
It is my first youtube video ever so go easy. :-)
I've been working on this one for a while and finally finished a few details and tuning the spring tension. Features of this design are: 1. only 2 pieces to print per side. 2. Uses brass bushing from the original plastic. 3. Fully supports Flex filament like Ninja flex and Fila Flex with no jamming.
I know there have been a couple change in the filament drive gear recently. Let me know if any adjustments need to be made. This version is based off the original straight drive gear. I have seen some newer ones with a rim on both sides and due to the tight fit of the drive gear it might rub. Easy fix, I just don't have any of the other drive gears at the moment to test fit.
Leave a comment on how this works out for you. Thanks.
The base should be printed flat with supports. The Lever can be printed a couple ways. I print it upside down with the filament hole toward the bed using a little support. Try not to let supports go inside the holes.
After printing you will want to mount the plastic without the filament drive gear and pinch roller installed, but use the spring to hold tension. Then use a 2mm drill bit to slightly enlarge and smooth/clear the filament path. The filament drive gear can be installed with the plastic in place. Use a 2mm allen wrench and slip behind the spring to tighten set screw. The filament pinch roller installs from the side. Use a 3mm x 10mm flat head socket screw to mount.
Print in ABS.
If you like my work consider purchasing an upgraded extruder mount. http://store.wmdproducts.com/index.php?route=product/product&product_id=62 Shameless plug. :-)