Ok, so last week I had an issues with a clog and found metal fragments in the extruder nozzle. This is a bit of a high-profile project for us, so I had previously purchased a spare extruder assembly (Amazon) as a “just in case”. When the jam happened I swapped out the extruder (before tearing down the original) and I was momentarily stymied by the heatbreak cooling fan connecting by a three pin plug on the new extruder and a two pin connector on the original…
I have a better than average parts stockpile so I just swapped out the fan connector shell on the head to match the machine and continued on.
My most recent print may be the worst this machine has ever produced.
It looks like the plastic was under temperature and there is near zero layer bonding - it comes apart like a slinky. The print was set (and the LCD reported) 240C for the whole print, and this is the same spool of filament that produced good parts at that temp before the incident.
I’m starting to wonder if the V2 head has any other differences beyond the connector?
A different thermister would explain this, but…