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M309: Set or report heater feedforward
Supported in RepRapFirmware v3.4 and later
- M309 Pn Saaa:bbb
- 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.