Hotend replacement is necessary when you encounter problems with material extrusion caused by a blockage inside the hotend. If the extruder motor makes a clicking sound or if the material leaks through the top of the hotend (around the two black screws), or if your print is incomplete (there is some material missing in the structure), the hotend needs replacing.
NOTE! Before replacing the hotend make sure that the nozzle is not blocked with material remains.
M Series Printers Servicing
The Zortrax M Series includes two printer models right now: the M200 and the M300. These printers are similar in terms of design and technology. The most important difference is their size: the M200 has a 200x200x180mm workspace, whereas the M300 has an increased 300x300x300mm workspace.
Therefore, maintenance and repair work can be carried out in the same manner with both models. The following manual shows M200 repair work. For the M300, these procedures look 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.
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
With a 1.5mm Allen key loosen the two screws that secure the heater and thermocouple in the hotend. Then remove both the heater and the thermocouple.
Heater and Thermocouple Assembly
Insert the heater and thermocouple into the new 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 – don’t push the heater too far into the slot in the hotend.
|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 Power Cable
Plug the power cable in.