[BUG or FR ] SWITCHING_EXTRUDER - disabled motor extruders

[DrumClock]

When using the SWITCHING_EXTRUDER function.

The extruder motors E1,E2,E3 do not work properly.
After a few seconds, E1, E2 turn off and E3 does not rotate at all.

I don't know if it's a given configuration:

#define EXTRUDERS 4 and #define HOTENDS 4 (for separate hotends )

if I change #define EXTRUDERS 4 and #define HOTENDS 1 it's the same. (for 4-IN-1-OUT hotends)

configurations:
https://github.com/DrumClock/Marlin/tree/GTR-2xMFG-V7

[DrumClock]

OK, thanks

[DrumClock]

I tried this:
in ..... \ Marlin \ src \ inc \ SanityCheck.h I disabled (so it can be compiled)

#if ENABLED (SWITCHING_NOZZLE)
  #if ENABLED (DUAL_X_CARRIAGE)
    #error "SWITCHING_NOZZLE and DUAL_X_CARRIAGE are incompatible."
  #elif ENABLED (SINGLENOZZLE)
    #error "SWITCHING_NOZZLE and SINGLENOZZLE are incompatible."
  #elif EXTRUDERS! = 2
    // # error "SWITCHING_NOZZLE requires exactly 2 EXTRUDERS."
  #elif NUM_SERVOS <1
    #error "SWITCHING_NOZZLE requires NUM_SERVOS> = 1."
  #endif

then I enabled SWITCHING_NOZZLE and set the unused servo0 (because I don't switch nozzles)

#define SWITCHING_NOZZLE
#if ENABLED (SWITCHING_NOZZLE)
  #define SWITCHING_NOZZLE_SERVO_NR 0
  // # define SWITCHING_NOZZLE_E1_SERVO_NR 2 // If two servos are used, the index of the second
  #define SWITCHING_NOZZLE_SERVO_ANGLES {45, 135} // Angles for E0, E1 (single servo) or lowered / raised (dual servo)
#endif

After these modifications, both motors for extruders and servos for E0-E3 switched and worked properly.

Perhaps this will help eliminate the bug or add FW.

I am very happy to tested before PR ...... just write me what to change here.

[ElectroFlux-SS]

Try disabling the following line:
#define DISABLE_INACTIVE_EXTRUDER

[DrumClock]

Hi @ElectroFlux-SS
Yes this setting works.
// #define DISABLE_INACTIVE_EXTRUDER

[github-actions]

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