I did a quick search on QU-BD failures and found many links. This is just the first one I found:
buildlog.net ? View topic - QU-BD MBE Extruder Failure Analysis
I may try switching to ABS, see if it works any better, but that means I need to build my hot bed onto my CNC machine.. Just more work.
Since I still have to use my router as a router, I switch back and forth so the machine is not pretty. I've got it setup now that i just pull the hot head off with 2 bolts, and a bunch of wires, then bolt the router back on. I just need to print about 30 more parts and I'll be done. Could take years...
3D Printing a part for work on my RepStrap CNC machine - YouTube
I just wish I could find a CNCable version of a Reprap that I could cut from MDF or plastic cutting boards. The one I found that was all CNC was just looked too complex to build since it only used 1 Z axis motor, and a long belt. And it hasn't been supported in years.
http://reprap.org/wiki/Isaac
I looked at the Prusa I3, but I couldn't really find clear instructions. It looks like the parts need to created using some tool based on the thickness of the material used for the frame. I just did a quick read, so I may be wrong. But the main frame would be easy enough to CNC, but I'm still stuck with some 3d parts that I would still have to print.
Anyway. Hoss Keep up the great work. Your threads are always very helpful and I'm always impressed with your creativity.
-C
p.s. Hoss I just saw this online..
Turn Your 3D Printer Into a Laser Cutter / Engraver - CNCCookbook CNC Blog CNCCookbook CNC Blog I expect to see this added to one of your machines any day now.