Inherited a Taz 6 printer and am having issues. For context, I am running 2.85mm material on an Aerostuder with a .5 nozzle. My firmware is v1.1.9.34. I have been running PLA with no issues since I received the printer and have tried to get it dialed in. I just picked up 2.85mm PETG and have been trying to run a simple print with the same settings that I use on my 1.75mm converted Taz 6. Print is set up with nozzle temp at 235 with a 75 degree build plate temp. First several layers print fine and then I get the following code “E1 Thermal Runaway.” I also noticed that even though my GCode calls out 235… my nozzle temp on the display is reading 206. Any advice on what to check first, or what parts may be bad? I’m fairly new to 3D printing and have never had any real mechanical issues until now.
It shouldn’t be the main issue, but you’re running very outdated firmware.
Update to the 2.x universal firmware for best results.
Your fan coming on that close to the bed may be causing the air to “bounce” off the bed and cool the nozzle, but the printer should be capable of holding higher temp than that regardless.
I would suggest running a PID autotune with temp of 225c, with the fan at 75% and your nozzle about 1mm from the build plate. If it gives a thermal runaway during the PID autotune, you might have a failing heater or thermistor.
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