Replacing Runout Sensor on the 3D45

If your printer isn't ablet to detect when the filament has runout, you may need to replace the filament run-out sensor on your printer. To do this, the top cover of the extruder will need to be replaced. To do this follow these steps.

Tools Required:

1. T10 Torx Bit or Screwdriver

Replacing the Top Cover of the Extruder

a. Cut the filament just before the intake on the top of the extruder.

b. Remove screw located on the right side of the hole using the T10 Torx screwdriver. The first picture below shows the location of the screw, the second picture a bottom view of the area where the screw is located, circled in red is the screw that needs to be removed.

c. Unscrew the two screws on the top of the filament guide bracket using the 2.5mm bit or Hex wrench.

d. Remove the top cover.

e. Carefully unplug filament run out switch from the extruder circuit board, ensuring to pull from the plastic plug and not the wires; pulling the wires can damage the connection to the extruder. Please see picture below.

f. Re-attach the fillament run out switch connector from previous step. Fasten the two screws on the top of the extruder top cover using the 2.5 mm hex wrench. Fasten right screw on the bottom of the extrder removed in step b using the T10 Torx screwdriver. Inset filament into extruder, and resume normal printer usage.