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Long Wait Time Due to Unstable Print Start Temperature

Temperature Threshold Description​

This configuration uses TEMPERATURE_WAIT to implement smart temperature waiting, avoiding long waits caused by temperature overshoot:

  • Nozzle (M109): Waiting temperature range is Target Temperature ±5°C

    • For example: When set to 200°C, waiting begins once the temperature reaches the 195-205°C range

  • Heated Bed (M190): Waiting temperature range is Target Temperature -2°C to +5°C

    • For example: When set to 60°C, waiting begins once the temperature reaches the 58-65°C range
    • The bed has a larger tolerance range due to stronger thermal inertia, resulting in slower heating/cooling processes

How It Works​

  1. Non-blocking Setting: The macro first sets the target temperature immediately via M104/M140 without waiting for the temperature to rise
  2. Smart Waiting: Uses TEMPERATURE_WAIT to start waiting within a reasonable range close to the target temperature
  3. Avoids Overshoot Waiting: Traditional M109/M190 waits for the temperature to fully stabilize, whereas this configuration continues execution once the temperature enters the tolerance range, improving efficiency

Configuration Example​

  • Place this macro directly in the configuration
  • The function of this macro is to wait normally for the temperature to rise, but proceed directly to the next step once the target temperature is reached
printer.cfg
[gcode_macro M109]
rename_existing: M109.1
gcode:
    {% set s = params.S|float %}
    M104 {% for p in params %}{'%s%s' % (p, params[p])}{% endfor %}  # Set nozzle temperature
    {% if s != 0 %}
    TEMPERATURE_WAIT SENSOR=extruder MINIMUM={s-5} MAXIMUM={s+5}   # Wait for nozzle temperature (tolerance ±5°C)
    {% endif %}	

[gcode_macro M190]
rename_existing: M190.1
gcode:
    {% set s = params.S|float %}
    M140 {% for p in params %}{'%s%s' % (p, params[p])}{% endfor %}   # Set bed temperature
    {% if s != 0 %}
        TEMPERATURE_WAIT SENSOR=heater_bed MINIMUM={s-2} MAXIMUM={s+5}  # Wait for bed temperature (tolerance -2°C/+5°C)
    {% endif %}

Notes​

  • It is recommended to perform PID calibration first for more stable temperature control
  • This configuration will override Klipper's native M109/M190 commands
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