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I'm attempting to get Autotune PID values for the heatbed. I'm using M303 with an E-1 parameter to designate the bed. I'm also using an S parameter to designate the desired temperature. It's returning a "Bad Extruder Number" error each time. M303 with no E parameter correctly runs the Autotune process and returns valid P, I and D values for the Extruder heater.

I'm using instructions found here, Marlin Firmware M301 / M303 / M304 G-Code Commands Explained.

Printer is a Prusa i3 clone using Marlin (version 1.1.6) with Repetier to send the commands.

Greenonline
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allardjd
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1 Answers1

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Your Marlin version is pretty old.

To enable the tuning of the bed, the configuration.h file requires the following compiler directive to be set:

#define PIDTEMPBED

If the hotend is tuned instead, this means that either the directive has not been set, or that the firmware is flawed by the following issue (#12468).

You should update the firmware to a newer version by flashing a more recent build. Note that the issue was present in a Marlin 2.0.x bugfix branch, so try the latest version or one from early 2019.

0scar
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