The nozzle is a narrow element attached to the extruder, which is used to direct the flow of material throughout the entire printing process. If you notice problems with extrusion – the material cannot be loaded, or the extruder motor begins to make clicking sounds, or if there are material deficiencies in the structure of your model, the nozzle may be clogged. Cleaning the nozzle in acetone is a way to keep it in perfect condition and extend its lifespan.

The following manual shows M200 repair work. For the M300, these procedures look the same.
1

Scrubbing the Nozzle

Take the spatula from the Starter Kit and gently scrub the nozzle to remove material remains.

2

Unclogging the Nozzle

From the menu choose “Material” and then “Load the material” option. Follow the instructions displayed on the screen.

Use the pliers from the Starter Kit to hold a needle. As soon as the printer starts to load the material, insert the end of the needle into the nozzle to unclog it.

If that doesn’t help, follow the rest of the steps from this manual.

3

Unloading the Material

From the menu choose “Material” and then “Unload the material” option. The extruder should start to heat up automatically. Once the extruder is hot, the motor will start to unload the material.

4

Nozzle Removal

Unscrew the nozzle counterclockwise (when viewed from below). Use the nozzle key from the Starter Kit box. Removing the nozzle should take place while the extruder is still hot. When the nozzle is loose, remove it using pliers.

5

Unplugging the Power Cable

Turn off the printer and unplug the power cable. Wait about 15 minutes and let the machine cool down.

6

Cleaning the Nozzle

If you were printing with Z‑GLASS / Z‑PETG / Z‑PCABS / Z-ESD, print a small-sized object using Z‑ABS. This will help to extrude material remains from the nozzle.

Using the pliers, place the nozzle in a container filled with acetone.

Make sure that the nozzle is cold before putting it into the container.
7

Removing the Nozzle from the Container

After 8-10 hours take the nozzle out of the container with pliers.

8

Nozzle Assembly

Install the nozzle in its place in the hotend and screw it in clockwise using the nozzle key (when viewed from below).

Screw in the nozzle gently; do not use too much force.

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