The FDM toolhead is a modular unit comprising a drive motor with Flexion extruder and a connectorized hotend. To install the FDM unit:
- Orient the FDM unit to the empty turret position and insert the ptfe tube into the collet on top of the arm. Make sure that the V of the end of the tube lines up well with the space between the drive roller and idler. Also be sure to push the PTFE all the way down until you can see it between the rollers.
Slide the extruder into place so that the 4mm pin protruding from the back left side of the extruder engages with the center hole of the left turret arm. Insert the (2) M3x12 mounting screws into place. Before tightening, note the position of the adjust the set screw on the bottom-right side of the mounting block. This screw allows adjustment of the height of the nozzle so that it matches the other tools. The height difference should not be greater than ~.25mm to enable optimal cleaning station performance. (Note: always loosen the mounting screws before making these adjustments.)
- Connect the (red) heater and (white) temperature sensor cables to the turret-FDM PCB to the left of the FDM tool (the PCB connectors are labeled HTR and SENSE, respectively). Connect the motor cable, which should pass between the turret-FDM PCB and the turret, to the motor. If this is the first time installing an FDM tool in this position, the cable may not yet be installed. Run the cable from the turret-relay PCB, between the turret-FDM PCB and turret (to the left side of the FDM tool), and directly to the motor connector. Ensure that the number on the turret-relay PCB matches the position on the turret
- Install the (blue) clip under the collet where the PTFE filament guide tube enters the extruder arm
To configure the tool, download the two relevant files from here. (for example, if you are installing Tool 2, unpload Tool Macros -> T2 -> FFF -> tcreate2.g and tpost2.g. Then upload them to your machine in Settings -> General -> Upload files. Then restart the machine. Make sure to reset your Z-offset before you start printing.
(Note: this may be more complicated in cases when switching from a 3-FDM configuration to 4- or 5-FDM. For some information, see the forum, or contact us directly for support.)