I’ve tried printing this job several times, and only recently noticed why it appears to be failing - My nozzle temperature appears to be dropping from 230C down to 206C during the print. I’m doing an SD card print where the temp has been set to a flat 230C with a heated bed temp of 85C (printing HIPS). I’m using the TAZ-5 all-metal print head, and I’ve been using it for several months without seeing this. From what I can tell, the target temp remains at 230C (as displayed on the LCD panel), but for whatever reason the nozzle temp drops to 206C regardless. The fan is usually set to about 55% at this time.
What would cause this symptom? The power supply? The controller board? The nozzle itself? It only happens after printing for about 5 minutes, it initially has no problem reaching 230C.