M104 Sxxx Tx - Klipper reports "Extruder not configured" under muti-extruder slicing

[jalanjarosz]

This is in reference to changes in: https://github.com/Klipper3d/klipper/pull/5143

Klipper v0.10.0-263-ge3cbe7ea

Hardware: Single hot end/heater, multiple extruders, using 'extruder_stepper' for additional non-synced steppers (2in/1out non-mixing)

Slicer: SuperSlicer with multiple extruders and Klipper gcode flavor

Klipper extruder and extruder_stepper setup:

[extruder]
step_pin: PC1
dir_pin: PC3 
enable_pin: !PC7
microsteps: 16
rotation_distance: 22.024
full_steps_per_rotation: 200
gear_ratio: 50:17
nozzle_diameter: 0.400
filament_diameter: 1.750
max_extrude_only_distance: 950.0
max_extrude_only_velocity: 250
max_extrude_only_accel: 2750
heater_pin: PB4
sensor_type: ATC Semitec 104GT-2 
sensor_pin: PK5 
control: pid
pid_Kp: 28.114
pid_Ki: 1.562
pid_Kd: 126.511
min_temp: 170
max_temp: 300

[gcode_macro T0]
gcode:
    # Deactivate stepper in my_extruder_stepper
    SYNC_STEPPER_TO_EXTRUDER STEPPER=belted_extruder EXTRUDER=
    # Activate stepper in extruder
    SYNC_STEPPER_TO_EXTRUDER STEPPER=extruder EXTRUDER=extruder

[extruder_stepper belted_extruder]
extruder: extruder
step_pin = PA4
dir_pin = PA6
enable_pin = !PA2
microsteps: 16
rotation_distance: 22.5
full_steps_per_rotation: 200
gear_ratio: 4:1

[gcode_macro T1]
gcode:
    # Deactivate stepper in extruder
    SYNC_STEPPER_TO_EXTRUDER STEPPER=extruder EXTRUDER=
    # Activate stepper in my_extruder_stepper
    SYNC_STEPPER_TO_EXTRUDER STEPPER=belted_extruder EXTRUDER=extruder

When SuperSlicer generates gcode for a change in temp at 2nd layer, the gcode like is: M104 S200 T1

Klipper extruder.py, under cmd_M104 will report "Extruder not configured".

    def cmd_M104(self, gcmd, wait=False):
        # Set Extruder Temperature
        temp = gcmd.get_float('S', 0.)
        index = gcmd.get_int('T', None, minval=0)
        if index is not None:
            section = 'extruder'
            if index:
                section = 'extruder%d' % (index,)
            extruder = self.printer.lookup_object(section, None)
            if extruder is None:
                if temp <= 0.:
                    return
                raise gcmd.error("Extruder not configured")
        else:
            extruder = self.printer.lookup_object('toolhead').get_extruder()
        pheaters = self.printer.lookup_object('heaters')
        pheaters.set_temperature(extruder.get_heater(), temp, wait)

Printing stops, but heaters remain on and steppers active.

Note: M104 S200 T1 works when using [extruder] and [extruder1] with shared_heater. I changed Klipper config due to shared_heater deprecation notice.

Current fix is gcode macro:

[gcode_macro M104]
description: Replaces built-in gcode to not specify Tx due to single extruder
rename_existing: M104.1
gcode:
    {% set s = params.S|default(0)float %}
    {% set t = params.T|default(0)|int %}
    {% if 'S' in params %}
      {%  if 'T' in params %}
        M104.1 S{s}
      {% else %}
        M104.1 S{s}
      {% endif %}
    {% endif %}

[jalanjarosz]

klippy.zip

[KevinOConnor]

It's not clear to me if you are reporting a regression (new klipper code with same config now results in an error), or if you are reporting that the behavior changed after modifying your config file (by removing shared_heater).

It seems you are reporting the latter. This change in behavior is normal - the M104 S200 T1 command is no longer valid as there is only one extruder heater. You can either change the slicer to not emit heating commands for two extruders, or create an M104 macro override to fixup the slicer commands. You can also continue to use the shared_heater setting - at least until it is removed from Klipper.

Probably best to move further discussions to Klipper Discourse - https://www.klipper3d.org/Contact.html

-Kevin

[jalanjarosz]

@KevinOConnor,

I wasn't sure if this was a break in code, or intended functionally. I'll be a little clearer in the future. Thanks for responding so quickly. I'll move this over to Discourse after I perform a bit more testing and check out the slicer for heating options.

Thanks -James

[Roycinger]

@KevinOConnor,

I wasn't sure if this was a break in code, or intended functionally. I'll be a little clearer in the future. Thanks for responding so quickly. I'll move this over to Discourse after I perform a bit more testing and check out the slicer for heating options.

Thanks -James

Hi James, did you manage to figure out a solution without using a custom M104 macro or how tell SuperSlicer not to emit heating commands for two extruders as @KevinOConnor said? If yes, how would you use filaments with 2 different temperature profiles then? To me, the removal of functionability of the format M104 S200 T1 is pretty odd. As there's no direct "replacement" of interpretation of the slicers command, the removal of this functionality leads to a hole in Klipper imho. Usually tinkering / fiddling around like this is not the structural way of Klipper that I'm used to.