PrintRite DIY Printer Ninjaflex Drive Modification

thingiverse

I modified this: http://www.thingiverse.com/thing:788358 to work with my PrintRite DIY 3D Printer. After printing in ABS with 100% infill, you'll need to file (or cut with an X-acto blade) some grooves on the main plate next to the lower filament hole so the idler wheel can get close enough to pinch the filament against the drive wheel and spin freely. You'll also have to remove the original plastic cap from the top of the extruder heater tube and adjust the heater tube height to match up with the bottom of the printed extruder base plate. Depending on how well-tuned your printer is, you may need to clean up and size the holes for a good fit using drill bits. I edited my post to mention that I drilled out a relief in the back of the heatsink to make room for the idler bearing screw head. I also ground down the head of the idler bearing screw a little thinner. I wish I had posted this right after making it, so I could remember exactly what I did! I've tested and found that it works well with NinjaFlex. The last photo in the gallery above shows a tire made from NinjaFlex on my printer using an ABS wheel. This is part of another "thing" I'm working on that I'll share when I finish it up. Disclaimer: It's been a couple of months since I created this, and it took me a while to find the STL files again to post. It's possible that what I uploaded isn't the exact revision of the base plate I ended up using, although I believe it is... If something simply doesn't fit right, especially the depth of the hole for the round shoulder on the extruder stepper motor around the shaft, let me know.