Shutdown on Thermal Runaway

General Discussion
1

I’ve been using octoprint for ages and have recently switched mainsail/moonraker. In Octoprint I used the tp smart link app to set my printer to switch off if there was thermal runaway as it was on a separate smartplug to my pi. Can I do this with klipper?

2

See Configuration reference - Klipper documentation and Configuration - Moonraker → search for TPLink Smartplug Configuration and Reboot / Shutdown from Klipper

3

inside moonraker.conf

[power {NAME_FOR_PLUG_DEVICE}]
type: tplink_smartplug
address: {IP_OF_PLUG}
off_when_shutdown: True
locked_while_printing: False
restart_klipper_when_powered: True
on_when_job_queued: True
restart_delay: 3

inside printer.cfg

[gcode_macro POWER_ON_PRINTER]
gcode:
  {action_call_remote_method("set_device_power",
                             device="{NAME_FOR_PLUG_DEVICE}",
                             state="on")}

[gcode_macro POWER_OFF_PRINTER]
gcode:
  {action_call_remote_method("set_device_power",
                             device="{NAME_FOR_PLUG_DEVICE}",
                             state="off")}

and then these for runaway

[respond]

[delayed_gcode bed_safety]
initial_duration: 2.
gcode:
  {% if printer.heater_bed.temperature >= settings.heater_bed.max_temp %}
    M118 EXCEED_THERMAL_LIMIT_BED
    POWER_OFF_PRINTER
  {% else %}
    UPDATE_DELAYED_GCODE ID=bed_safety DURATION=2
  {% endif %}

[delayed_gcode extruder_safety]
initial_duration: 2.
gcode:
  {% if printer.extruder0.temperature >= settings.extruder.max_temp %}
    M118 EXCEED_THERMAL_LIMIT_EXTRUDER
    POWER_OFF_PRINTER
  {% else %}
    UPDATE_DELAYED_GCODE ID=extruder_safety DURATION=2
  {% endif %}

Those two macros should trigger when we go past the defined maxes for the heaters, and a message so you can debug when it happens

Someone can tell me I’m doing it wrong but this works for me

1 Like
4

This looks interesting and very useful but could you explain the moonraker.conf statements? I’m guessing there for a shutdown relay?

Also, what are the units of “initial_duration”/“DURATION” - are they seconds or minutes?

5

Detailed instructions are here

Since both I and the OP use a TPLink the device, that is why the type is set to tplink_smartplug

off_when_shutdown, powers off the plug when klipper enters a shutdown state (like turning off a Pi running klipper)

restart_klipper_when_powered, triggers a FIRMWARE_RESTART after the plug turns on, so the printer can connect to klipper on powerup.

on_when_job_queued allows power on from slicer and when prints are sent to klipper

restart_delay delays the restart in seconds, gives the mainboard of the printer a bit of time to get ready.

As for the delayed gcode

DURATION is in seconds, more info here

6

Thank you for the detailed reply.

Now, I’m guessing your rPi (or whatever system controller you’re using) is powered separately - correct?

It looks like you are also waiting for Klipper to connect with the controller board when you power up. It doesn’t look like there’s any timeout - so if there is no connection, things just wait indefinitely? How do you reset in this case?

7

Yes it is powered separately,

I open Fluidd in my case and monitor what is happening, once I send something from my slicer, the printer powers up and usually connects.

Sometimes I just do a firmware_restart and that sorts out any problems

1 Like
8

Nice write-up. :+1:
You could add this to the “Config” section as an own thread for later reference.

1 Like
9

One more thing, if you want to turn off the printer after idling for a bit you can like so

in printer.cfg or dedicated macro.cfg

[delayed_gcode delayed_printer_off]
initial_duration: 0.
gcode:
  {% if printer.idle_timeout.state == "Idle" %}
    POWER_OFF_PRINTER
  {% endif %}

[idle_timeout]
gcode:
  M84
  TURN_OFF_HEATERS
  UPDATE_DELAYED_GCODE ID=delayed_printer_off DURATION=60

two minutes of idle state powers off the printer

10

Thanks for the help. I’ve copied them into the right places and will let you know how I go

11

A little more searching found this on github - TPLink power off delay doesn't work correct · Issue #366 · Arksine/moonraker · GitHub
Not thermal runaway but adds to the idle macro