The heater and thermocouple are responsible for providing and maintaining the appropriate temperature in the hotend during material loading and the printing process. Also, the heater transfers the signal required for the printer to complete the platform calibration. Therefore, if the extruder is overheating or the heating is insufficient, or if your prints have blisters and hanging strands on their surface, the heater and thermocouple may be faulty and require replacement. Also, the extruder heating problems are indicated by the firmware messages: Error #010 Extruder heating error, Error #011 Extruder temperature is too high, and Error #013 Unexpected extruder temperature drop. Sometimes, if you are unable to finish platform calibration or if the nozzle hits the platform during the pre-print calibration, it may be necessary to replace the heater and thermocouple.
Before replacing the heater and thermocouple, make sure that they are properly installed in the hotend.
|NOTE: If you have the heater&thermocouple v1, you also have to replace the hotend and the extruder PCB.|
|The following manual shows the M200 repair work. For the M300, these procedures are the same.|
Unloading the Material
If the material is loaded into the extruder, unload the material using the “Material” -> “Unload the material” option in the menu.
Unplugging the Power Cable
Turn off the printer and unplug the power cable.
Wait until the printer – especially the hotend – cools down completely.
Unplugging the Extruder Cable
Unplug the extruder cable.
With a 1.5mm Allen key loosen the two screws that secure the hotend and remove the hotend from the extruder.
Heater and Thermocouple Removal (from the Hotend)
With a 1.5mm Allen key loosen the two screws that secure the heater and thermocouple in the hotend. Then remove the heater and thermocouple.
Extruder Upper Printed Cover Removal
Detach the extruder upper printed cover from the extruder.
Heater and Thermocouple Removal (from the Extruder)
Remove the heater and thermocouple from the extruder block and from the heat shrink tubing. Unplug the cables from the extruder PCB.
New Heater and Thermocouple Assembly (in the Extruder)
Plug the heater and thermocouple cables into the extruder PCB. Put them through the heat shrink tubing and inside the extruder’s block.
Extruder Upper Printed Cover Assembly
Attach the extruder upper printed cover.
Heater and the Thermocouple Assembly (in the Hotend)
Insert the heater and thermocouple into the hotend and firmly tighten the two screws that secure them (using a 1.5mm Allen key).
Make sure that the screws don’t go through the insulation that covers the wires (this can happen if the heater goes too deep into the slot).
|This picture shows the heater inserted correctly.||This picture shows the heater pushed too far into the slot in the hotend.|
Insert the hotend into the extruder and tighten the two screws that secure it (using a 1.5mm Allen key).
Plugging the Extruder Cable
Plug the extruder cable in.
Plugging the Power Cable
Plug the power cable in.