BTW: I've now done over 24 rolls of PLA through your head and NO ISSUES at all! (So thats like 2.5klms plus of plastic!)An 6 month old early J-Head Mk III, that is regularly used to print ABS, is also reported to be still going strong.
Tonight, I was asked what the common reasons for failure were and I responded with 3. Those are:
- Cheap filament with contaminants.
- Overheating to the point that the PEEK nozzle holder softens.
- If the PTFE liner gets "crimped" at the junction between the PTFE and the brass.