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Parameters

• Sn n=0 turn power off immediately (default), n=1 turn power off when all thermostatic fans have turned off (RepRapFirmware 1.20 and later only)

Example

• M81 ; turn power off immediately
• M81 S1 ; turn power off when all thermostatic fans have turned off

Turns off the ATX power supply. Counterpart to M80. A deferred power down command (M81 S1) that has not yet happened can be cancelled using M80.