Ender 3 v2 Latest firmware constant thermal runaway?

Marlin Firmware Service Bug Reports
1

Paste.ee - ender 3 v2 thermal runaway ? To me, looking at the log, i dont see any signs of thermal runaway ? is this a bug ?

2

FIRMWARE_NAME:Marlin bugfix-2.0.x-mfs (Aug 15 2021 10:23:50) SOURCE_CODE_URL:github.com/MarlinFirmware/Marlin PROTOCOL_VERSION:1.0 MACHINE_TYPE:Ender-3 V2 EXTRUDER_COUNT:1 UUID:cede2a2f-41a2-4748-9b12-c55c62f367ff
Recv: Cap:SERIAL_XON_XOFF:0
Recv: Cap:BINARY_FILE_TRANSFER:0
Recv: Cap:EEPROM:1
Recv: Cap:VOLUMETRIC:1
Recv: Cap:AUTOREPORT_POS:0
Recv: Cap:AUTOREPORT_TEMP:1
Recv: Cap:PROGRESS:0
Recv: Cap:PRINT_JOB:1
Recv: Cap:AUTOLEVEL:1
Recv: Cap:RUNOUT:1
Recv: Cap:Z_PROBE:1
Recv: Cap:LEVELING_DATA:1
Recv: Cap:BUILD_PERCENT:0
Recv: Cap:SOFTWARE_POWER:0
Recv: Cap:TOGGLE_LIGHTS:0
Recv: Cap:CASE_LIGHT_BRIGHTNESS:0
Recv: Cap:EMERGENCY_PARSER:0
Recv: Cap:HOST_ACTION_COMMANDS:1
Recv: Cap:PROMPT_SUPPORT:1
Recv: Cap:SDCARD:1
Recv: Cap:REPEAT:0
Recv: Cap:SD_WRITE:1
Recv: Cap:AUTOREPORT_SD_STATUS:0
Recv: Cap:LONG_FILENAME:0
Recv: Cap:THERMAL_PROTECTION:1
Recv: Cap:MOTION_MODES:0
Recv: Cap:ARCS:1
Recv: Cap:BABYSTEPPING:1
Recv: Cap:CHAMBER_TEMPERATURE:0
Recv: Cap:COOLER_TEMPERATURE:0
Recv: Cap:MEATPACK:1

3

These lines are what give us the best info:

Recv:  T:205.59 /210.00 B:60.01 /60.00 @:127 B@:24
Recv:  T:205.61 /210.00 B:60.02 /60.00 @:127 B@:18
Recv:  T:205.70 /210.00 B:60.00 /60.00 @:127 B@:25
Recv:  T:205.70 /210.00 B:60.01 /60.00 @:127 B@:22
Recv:  T:205.64 /210.00 B:59.99 /60.00 @:127 B@:30
Recv:  T:205.70 /210.00 B:59.97 /60.00 @:127 B@:38

The @:127 means that the hotend heater is on at 100% power, but the T: value shows that the temperature isn’t rising - which is not what you’d expect from 100% power.

Firstly, make sure that the silicon sock is fitted to your heatblock - like so:

image
image1920×2560 167 KB

Secondly, make sure the thermistor is correctly in the hole in the heatblock to make sure you’re getting proper temperature readings:

image
image1024×504 49 KB

If all those are good, you should perform a PID tune as documented in the FAQ.

Running through these is likely to solve the majority of the problems that would cause this.

4

thank you for the reply, yea my heatsock got chewed up early on (nozzle crashed into bed and dragged the heat sock and ripped it up), but i didnt think that made a difference!, ill order a new one, thanks for your help!