Hi everyone- first post here. I am hoping someone can offer a little guidance.
I have been having a thermal runaway issue on my CR10 S5. Currently I am trying to run a 50 hour PETG print and have been seeing intermittent stops. What I notice is that when I suffer one stop, there seem to be more not too far behind. Then I can go days without another one. I am terrified of committing to this big print as it will be close to $50 in filament, and the resume function really only gets me one restart after the thermal runaway hits.
Here’s a brief rundown of my rig. Couple of pics here. https://imgur.com/a/yrXq0Ri
• I am equipped with an E3D volcano, and running Marlin 1.1.9.
• Increased thermal protection hysterisis on the hot end/bed from 4c to 10c.
• I have replaced the thermistor twice now. The first replacement was definitely due, as the hotend had worn all of the insulation from my thermistor wires. I had a spare E3D unit, but was still suffering runaways. I recently put in a new bolt on thermistor from gulfcoast robotics. Temps are currently rock solid, but still I am getting these damn thermal runaways.
• I am running a little modified fan shroud from thingiverse, but as my temps appear stable, I don’t know that it’s really causing an issue. I had been running overnight prints from May-July with this set up and Marlin 1.8.x and had no issues until recently.
Currently I am sitting here with my fan blasting, hot end at 260c and bed at 60c. It’s been a couple hours. Not a peep. S3D shows temps are happily pegged without so much as 1c change in temp. Clearly, it’s waiting till I start feeding it filament