Solved Nozzle does not cool down when homing Z

[Ho-whizzle]

Hello all,

Long story short, I had to rebuild Klipper from scratch as soemthing went wrong with the last but after building the new Klipper Mainsail OS i noticed that the nozzle does NOT cooldown below 150 degree before homeing the Z. In my previous OS it will let me know after XY homing and before the Z homing that the nozzle temperature is cooling before homing Z. I dont know why I cannot find it in the Klipper instructions (I know its my old age) but if anyone can tell me where in the printer.cfg file this setting is, I will be very grateful.

 

[thunderkeys]

add to the [probe] section of your printer.cfg

Note that you will need to have commands to restore nozzle temperature after homing elsewhere (e.g. in your PRINT_START macro).

activate_gcode:
    {% set PROBE_TEMP = 150 %}
    {% set MAX_TEMP = PROBE_TEMP + 5 %}
    {% set ACTUAL_TEMP = printer.extruder.temperature %}
    {% set TARGET_TEMP = printer.extruder.target %}

    {% if TARGET_TEMP > PROBE_TEMP %}
        { action_respond_info('Extruder temperature target of %.1fC is too high, lowering to %.1fC' % (TARGET_TEMP, PROBE_TEMP)) }
        M109 S{ PROBE_TEMP }
    {% else %}
        # Temperature target is already low enough, but nozzle may still be too hot.
        {% if ACTUAL_TEMP > MAX_TEMP %}
            { action_respond_info('Extruder temperature %.1fC is still too high, waiting until below %.1fC' % (ACTUAL_TEMP, MAX_TEMP)) }
            TEMPERATURE_WAIT SENSOR=extruder MAXIMUM={ MAX_TEMP }
        {% endif %}
    {% endif %}

 

[Ho-whizzle]

add to the [probe] section of your printer.cfg

Note that you will need to have commands to restore nozzle temperature after homing elsewhere (e.g. in your PRINT_START macro).

activate_gcode:
    {% set PROBE_TEMP = 150 %}
    {% set MAX_TEMP = PROBE_TEMP + 5 %}
    {% set ACTUAL_TEMP = printer.extruder.temperature %}
    {% set TARGET_TEMP = printer.extruder.target %}

    {% if TARGET_TEMP > PROBE_TEMP %}
        { action_respond_info('Extruder temperature target of %.1fC is too high, lowering to %.1fC' % (TARGET_TEMP, PROBE_TEMP)) }
        M109 S{ PROBE_TEMP }
    {% else %}
        # Temperature target is already low enough, but nozzle may still be too hot.
        {% if ACTUAL_TEMP > MAX_TEMP %}
            { action_respond_info('Extruder temperature %.1fC is still too high, waiting until below %.1fC' % (ACTUAL_TEMP, MAX_TEMP)) }
            TEMPERATURE_WAIT SENSOR=extruder MAXIMUM={ MAX_TEMP }
        {% endif %}
    {% endif %}

Thanks for the code but does some reason it didn’t work.

Also, I don’t remember it being a G-code when I was setting it up. For some reason I thought it was in the probe section.

 

[claudermilk]

That gcode macro goes in the probe section. Put it in after the other settings lines.

 

[Ho-whizzle]

Thank you all! problem solved!