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M303 - PID autotune

thermal Auto-tune the PID system to find stable values. PIDTEMP|PIDTEMPBED

Description

This command initiates a process of heating and cooling to determine the proper PID values for the specified hotend or the heated bed.

Notes

View current PID values with M503.

If EEPROM_SETTINGS is enabled, all PID values are saved with M500, loaded with M501, and reset with M502.

Usage

M303 [C<count>] [D] [E<index>] [S<temp>] [U<bool>]

Parameters

[C<count>]

Cycles. At least 3 cycles are required. Default 5.
    [D]

    Toggle PID debug output on / off (and take no further action). (Requires PID_DEBUG)
      [E<index>]

      Hotend index (-1 for heated bed). Default 0.
        [S<temp>]

        Target temperature
          [U<bool>]

          Use PID result. (Otherwise just print it out.)

            Examples

            Auto-tune hotend at 210 °C for 8 cycles:

            M303 E0 C8 S210

            Auto-tune bed at 60 °C for 8 cycles:

            M303 E-1 C8 S60