[BUG] JGAURORA MAGIC unloads filament at print start

[nvdias0]

After updating to 2.1.2.1 from stock firmware, the filament always auto-unload at print start.

[thisiskeithb]

The stock JGAurora Magic config matches what we have:

JGAurora's Magic source

#if ENABLED(FILAMENT_RUNOUT_SENSOR)
  #define NUM_RUNOUT_SENSORS   1     // Number of sensors, up to one per extruder. Define a FIL_RUNOUT#_PIN for each.
  #define FIL_RUNOUT_INVERTING true // set to true to invert the logic of the sensor.
  #define FIL_RUNOUT_PULLUP          // Use internal pullup for filament runout pins.

MarlinFirmware source

https://github.com/MarlinFirmware/Configurations/blob/0e94d8886d8707e25f1c540739d68c72b1de1948/config/examples/JGAurora/Magic/Configuration.h#L1880-L1885

(FIL_RUNOUT_INVERTING true is now FIL_RUNOUT_STATE HIGH, so they're the same)

If you send M119 via serial/USB, what does the filament: line say with filament present? What about without filament?

M119 example:

Send: M119
Recv: Reporting endstop status
Recv: x_min: open
Recv: y_min: open
Recv: z_min: open
Recv: filament: TRIGGERED

[nvdias0]

With filament loaded:

M119 reports x_min: TRIGGERED y_min: TRIGGERED z_min: TRIGGERED filament: open

Used the unload filament option in the menu It unloaded ok. After filament has been unloaded:

M119 reports the same x_min: TRIGGERED y_min: TRIGGERED z_min: TRIGGERED filament: open

[thisiskeithb]

If you revert back to the original firmware, what does M119 report? All of the firmware configs/builds I'm finding for the JGAurora Magic match what we have and with your machine showing filament: open when filament is both present & removed, points to a possible physical switch/wiring issue.

[nvdias0]

I've just used a multimeter to test the wiring and filament detection switch. I confirm the wiring is working ok up to the mainboard.

Searching in the code, it assumes that FIL_RUNOUT_PIN for these mainboards BOARD_RAMPS_14_EFB is SERVO3_PIN (pin 4).

BUT ... Looking at the mainboard plug, the filament runout pin in the mainboard is X+ / Pin 2 and not SERVO3_PIN (i've seen the same in several youtube tech tutorials in youtube that shows the mainboard)

So I've added : #define FIL_RUNOUT_PIN X_MAX_PIN into configuration.h

And it worked ! M119 reports filament open or tiggered as expected !

I'm using a JGMAKER / JGAURORA MAGIC.

Thanks

[ellensp]

@nvdias0 confirmed they pulled a pin switch on us

https://github.com/JGMaker3dofficial/magic/blob/cf104ef6cbe44f9e12dc0b17975241ff191c9c9f/magic/Marlin/pins_RAMPS.h#L282

define FIL_RUNOUT_PIN 2

vs a stock ramps pin of 4

[ellensp]

Added to the JGAurora Magic Fixes PR https://github.com/MarlinFirmware/Configurations/pull/980