Our week-old TAZ 5 has been printing parts in white ABS (from Lulzbot) without any trouble, but just yesterday it decided to stop extruding filament altogether, even in air. This seemed to indicate a clog, so we tried doing some cold pulls, which came out looking quite ghastly:
At no point did we see anything resembling the inside of the nozzle, and I’m not sure if those three little cavities are to be expected or not. Based on the 3D diagram of the nozzle, I would say they’re not. The hotend did, however, go from completely clogged to just partially clogged, as you can see from this picture:
Rather than flowing freely as it did before, the extruded ABS now forms curly lumps around the nozzle tip. I’ve already spoken to support about this and aside from doing more cold pulls, they had me try a print of the Rocktopus, which came out looking like a hot mess:
We don’t want to resort to soaking the nozzle in acetone, but are there any remaining options apart from having a replacement sent?
I’m also wondering what could have gone wrong to cause this in the first place. We’ve only used the green PLA that came with the machine and then white ABS ordered directly from Lulzbot.