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Prerequisites

Having access to the rear and right side of the machine is recommended for this installation.

Parts Required

• Filament Switch Sensor Assembly

• Three 18lb, 4” zip tie

• Two M4x40mm socket head screws

• Sensor Cable

• 150mm Length PTFE Tube

• One Filament Entry Port Assembly

• Two M4x16mm socket head screws

Tools Required

• 2.5mm hex bit or key

• 3mm hex bit or key (a short ball-end Allen key is recommended)

• Loctite 242 (or a comparable medium strength thread-locker)

Procedure

• Remove the filament and disconnect the filament storage container from the machine.

• Turn off the machine.

• Unplug the power cable.

• Remove the Wi-Fi antenna on the back of the machine.

• Remove the back-panel leading to the electronics by removing the six M4x16mm button head screws.

• Remove the following cable track covers:

• Remove the 120mm fan covering the main controller by unplugging the fan from the power distribution board and removing the four M4x35mm socket head screws. You could also remove the three screws not near the fan’s wires and pivot the fan counter-clockwise out of the way, not having to unplug it.

• Remove the right side-panel to gain access to the filament entry port by removing the eight M4x16mm button head screws.

• Open the lid and remove the filament path between the printhead and the rear-swivel mount. The Filament Switch Sensor Assembly replaces this rear swivel mount.

• Remove the rear-swivel mount by unscrewing the two M4x40mm socket head bolts.

• Remove the filament entry port by unscrewing the two M4x16mm socket head bolts. This is when a short ball-end Allen key is useful.

• Fully remove the filament entry port and rear-swivel mount and PTFE tube between them.

• Install the newly supplied PTFE tube into the new Filament Entry Port Assembly.

• Install the Filament Entry Port Assembly using two M4x16mm socket head screws with medium strength thread-locker applied.

• Feed the PTFE tube up through the top-plate.

• Install the PTFE tube into the fitting of the Filament Switch Sensor Assembly. Be sure it fully seats within the assembly. Using gloves with a grippy texture is helpful (PTFE is slippery).

• Install the Filament Switch Sensor Assembly onto the tower using two m4x40mm socket head screws.

• Test the fitment with a piece of filament. You should be able to feed up through the Filament Switch Sensor Assembly without catching on anything. If you cannot, ensure the PTFE tube is fully seated in the Filament Switch Sensor Assembly and the Filament Entry Port Assembly

• Plug the Sensor Cable into the Filament Switch Sensor Assembly. It is keyed and will only plug in one way.

• Feed the wires down through the top-plate and into the electronics panel.

• Depending on what hardware you have will determine where to plug in the Sensor Cable, follow the guide below depending on your main control board:

• Once plugged in, secure the wires with a zip-tie.

• Reinstall the 120mm fan with four M4x35mm socket head screws.

• Reinstall the cable track cover.

• Reinstall the rear panel with six M4x16mm button head screws.

• Reinstall the Wi-Fi antenna, threading it onto the SMA connector.

• Reinstall the side panel with eight M4x16mm button head screws.

• Reinstall the filament path between the printhead and the new Filament Switch Sensor Assembly.

Considerations

Access to the screws that secure the filament entry port is quite limited. Using a short ball-end Allen key will allow you to remove/install it but it can be difficult. If more space is required, you can move the chamber air recirculating fan by unscrewing the four screws that pass down through the top-plate to the fan assembly. There are connectors leading to the fan assembly than can be disconnected and the assembly fully removed if necessary. This will give you more access.