Tools:
① 3 mm hex wrench
② 2.5 mm hex wrench
③ 2 mm hex wrench
Important: The left and right side hotend assemblies are not interchangeable.
An etched letter (L or R) will indicate which side (left or right) a hotend component is intended to replace.
1. Before you start, unload any filament from the printhead of which hotend will be replaced.
2. Power off the printer.
3. Open the buckle securing the Extruder Connection Cable (ECC) at the printhead. Gently flex the barbed clip so it is allowed to pass through the opening on the buckle, which should allow the buckle to be swung open to release its compression on the cable.
4. Disconnect the Extruder Connection Cable from the board by depressing the small plastic latch while gently pulling the connector outward.
5. Use a 3mm hex wrench to remove the two screws securing the printhead to the X-axis gantry sled.
6. Remove the printhead from the X-axis gantry, and move it to a clear workspace.
7. Use a 2.5mm hex wrench to remove the two screws used to retain the extruder connection board cover on the printhead.
8. Use a 2mm hex wrench to remove the two screws retaining the front cover to the printhead, and remove the front cover to allow for unobstructed cable routing.
9. Carefully disconnect the two cables, for the hotend component, from the slots marked in red, as shown in the picture below.
10. On the underside of the printhead, use the 2.5mm hex wrench to remove the cable clip used to route the hotend cables.
11. Loosen the hotend set screw with the 2 mm hex wrench. It is not necessary to remove this screw.
12. With the set screw loosened, carefully slide the entire hotend assembly out.
13. Prepare a replacement hotend assembly.
Note: A left and right side hotend assembly are not interchangeable.
An etched letter (L or R) will indicate which side a hotend component is intended to be used as a replacement.
14. Carefully insert the replacement hotend assembly fully into the printhead.
15. Fasten the set screw, with a 2mm hex wrench, to secure the hotend component.
16. At the underside of the printhead, gently curve the hotend cables over the right side of the stepper motor. Use the 2.5mm hex wrench to fasten the clip securing the routing of the hotend cables.
17. At the topside, plug the two cables into the Extruder Controller Board.
18. Carefully align and slide the front cover back onto the printhead, and use the 2mm hex wrench to reinstall the two screws to secure the cover.
19. Align and place the Extruder Connection Board cover back onto the printhead, and use the 2.5mm hex wrench to reinstall the two screws. Ensure that all excess cable slack is nested beneath the cover.
20. Put the printhead back onto the X-axis gantry, and use the 3mm hex wrench to reinstall the two screws that secure it to the printhead sled.
21. Connect the Extruder Connection Cable back into the board connector, and lock the swinging buckle to secure the cable into place.
22. Turn on the printer and run the five-step wizard to calibrate. It is recommended to adjust the height of the left and right nozzles as well. (For more information please refer to the tutorial: Calibration for Duplication and Mirror Mode Printing).
Note: You can find the “Offset Calibrations” at the gearwheel icon for “Settings > Machine tab > Maintenance > Offset Calibration”.
