Back to the Gcode Dictionary

Supported in RepRapFirmware v3.4 and later

Usage

• M309 Pn Saaa:bbb

Parameters

• Pn Tool number
• Saaa:bbb:ccc... Feedforward coefficients. The number of coefficients provided must equal the number of heaters configured for the tool when it was created (see M563).

If the P parameter is not provided, the current tool is assumed. If the S parameter is not provided, the existing coefficients are reported.

The units of S are PWM fraction (on a scale of 0 to 1) per mm/sec of filament forward movement.