I’ve had my taz 5 for about 6 months now. Love it, most of the time. About 3-4 months ago, I had the extruder body part crack/delaminate right where the rear bearing mounts. Once I finally figured out what was happening, I got Lulzbot to replace some parts, and I was off and running. First thing, build a spare print-head. The reason I knew something was wrong is abs parts started to fail as the hobbed bolt would eat the filament. What I could tell is there was excessive slop and motion on the hobbed bolt assembly.
Fast forward to friday, same thing started happening. OK, time to test that spare print head. I have it running beautifully on the spare head again, and we’re happy, but while my extruder body didn’t crack, it did deform. The ear that the idler arm mounts to had excessive wear on the back surface, and the flat area where the back bearing fits was no longer flat but slightly deformed, messing up the assembly.
It may be because I run my machine in an enclosure since I prefer to use ABS, that the overall heat causes some problems. I’ve rebuild the other head and have it ready for next time, but I’m thinking of building a set of parts out of nylon to see if that improves the life. I was just wondering if anyone else saw this happen? I was at the 3D print show in Pasadena today, and was talking to MatterHackers which is where I bought my Taz, and they were telling me they run their Taz with a flexystruder for all materials. They felt it is a more robust tool-head. Anyone else do this?