3D Printing Tech Tips: How to Change the Filament Nozzle

3D Platform walks viewers through the process of changing a nozzle on your large format 3D printer. The required tools you will need are a 7mm deep well socket or wrench, and a crescent wrench.

Step 1: Auto-Home the Axes
First, auto home the axis.

Step 2: Raise the Z-Axis
Once the extruder is in the home position, raise the z-axis to 300 millimeters to allow room to work.

Step 3: Heat to 200° C
Set the extruder temperature to 200° C. This will melt the plastic inside the extruder and help loosen the nozzle. Note: Remove filament prior to heating the nozzle.

Step 4: Remove the Nozzle
Once the temperature has reached 200° C, use a crescent wrench to hold the extruder steady while using a 7 mm socket wrench to remove the nozzle. Avoid contact with the thermistor connections.

Step 5: Thread in the New Nozzle by Hand
Once the nozzle has been removed select the replacement nozzle. Nozzle sizes can be determined by inspecting the machine dots along the side of the nozzle. Thread the new nozzle into the extruder.

Step 6: Tighten the New Nozzle Until Snug
Tighten the new nozzle into the assembly using the crescent wrench and socket wrench. Only tighten until snug and remember not to over-tighten.

Step 7: Increase Extruder Temperature to Seat the Nozzle
Increase the nozzle temperature from 200° to 280° C.

Step 8: Use Wrenches to Seat the Nozzle
Using the crescent wrench and the socket wrench, tighten the nozzle one more time.

After the Nozzle Change:
Each time you change a nozzle, it is a good idea to confirm the z height of the extruder. Using a business card, verify a snug fit between the nozzle and the glass. If the z height is too high or too low, manually adjust the extruder bracket using a 3 mm Allen wrench.

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