Phenomenon

• When you start a print, the touchscreen keeps telling you the filament is run-out but you have loaded the filament already.
• 

Cause

• The filament switch is triggered abnormally. The switch is placed incorrectly, and it can be fixed by slight adjustment.

Solutions

• Connect the machine with the PC via the provided USB cable and then start a print from Snapmaker Luban. When the printing process is on, you can shake the filament manually to imitate the movement state of the filament. You need to check if the warning of “Filament runout” still shows up. If the issue still exists, check the status of the filament switch by entering M119.

> M119

> SENDING:M119

> Reporting endstop status

> x_min: open

> x_max: open

> y_min: open

> y_max: open

> z_min: open

> z_max: open

> z_probe: open

> filament: TRIGGERED

• Turn the filament sensor off if you want to print it now.

  • M412 S1 Enable filament run-out detection
  • M412 S0 Disable filament run-out detection
  • M412 Report the current filament run-out detection state

• You can adjust the filament switch as shown in the videos below.

  • Remove the fan
  • Adjust the filament switch

• After you adjust the filament switch, you can test the switch by command M119 as well.

SENDING:M119
Reporting endstop status
x_min: open
x_max: open
y_min: open
y_max: open
z_min: open
z_max: open
z_probe: open
filament: open