SPARKX i7，i8
Possible causes include:
1. The filament has run out
The filament spool is completely empty, or the filament has just run out before reaching the filament sensor.
2. The filament has broken or become stuck
The filament has broken inside the PTFE tube or become stuck before reaching the filament runout switch, preventing the sensor from detecting it.
3. The filament sensor switch is faulty or its contact is not closed
The sensor's internal microswitch may be stuck, its metal tab may be deformed, or dust and debris may prevent it from correctly detecting filament.
4. Poor signal cable connection
The cable connecting the filament sensor module to the mainboard is loose, disconnected, or damaged, preventing the printer from receiving a normal signal.
1. Check the filament
Check the spool and filament inlet to confirm whether the filament has run out. If it has, load new filament following the normal filament replacement procedure.
2. Check for broken filament
Check along the PTFE tube for pieces of broken filament. If filament has broken inside the tube, disconnect the tube and remove the fragments.
3. Manually load replacement filament
On the printer screen, tap Load or Resume Print, then try manually feeding new filament to check whether the sensor detects it and whether it feeds normally.
4. Clean the sensor
If filament debris is stuck inside the sensor, open the sensor module housing and remove the debris. Make sure the internal microswitch returns freely to its original position.
Step 1: Visually Check the Spool Holder
Check whether the filament on the spool has run out or broken.
Step 2: Check the Status Indicator (i8 Only)
Observe the LED status indicator on the toolhead. It lights up or turns off when filament is inserted. Check whether its state changes depending on whether filament is present to determine whether the sensor is powered and working normally.
Caution: This troubleshooting guide is only applicable to the i8.
Step 3: Disassemble, Inspect, and Mechanically Reset the Sensor
Open the toolhead and check the sensor for damage, jamming, or displacement. Trigger the sensor several times, for example by repeatedly inserting and removing a short piece of filament. Listen for a clear click to confirm that the microswitch is not damaged.
Step 4: Check the Cable and Connectors
With the power off, check whether the connectors between the sensor and the mainboard or adapter board are loose. Disconnect and reconnect the connector to rule out poor contact.
Step 5: Check the Software and Firmware
If the sensor's hardware and physical condition have been confirmed to be normal but the error persists, try restarting the printer or updating the firmware.
Step 6: Replace the Faulty Component
If the checks above confirm that the sensor is damaged, contact customer support to replace the filament sensor module with the same model.