Call3D TZ 2.0 HotEnd Installation Guide for Bambu Lab

Preparation

• Cotton swabs
• Thermal grease (compatible with 3D printer hot ends)

Step-by-Step Installation Process

1. Remove the Old Hot End

2. Apply Thermal Grease

• Some hot ends may not come pre-applied with thermal grease, so you'll need to add it manually.
• Squeeze a small amount of thermal grease onto the copper tube of the new hot end. Copper is chosen for its superior thermal conductivity compared to aluminum, ensuring efficient heat transfer.
• Use a cotton swab to spread the thermal grease evenly across the surface. Avoid using excessive grease—just a thin, uniform layer is sufficient.
• After application, check for any excess grease that might have seeped into the holes. If present, use a clean end of the cotton swab to wipe it away, as grease in the holes can cause malfunctions.

3. Install the New Hot End

• Pay attention to the installation direction: align the wider end with the wire orientation to prevent reversed installation (which would require disassembly and re-installation).
• You may feel slight resistance when inserting the hot end—this is a sign of improved precision. Gently rotate the hot end while pushing it in to ensure the thermal grease distributes evenly.
• Do not fully tighten the four fixing screws immediately; this helps avoid one-sided deviation during installation.

4. Secure and Inspect

• Tighten the screws synchronously on both sides to ensure the hot end is firmly fixed.
• Check that the hot end is properly seated and has no front-back looseness.
• Organize the wires neatly and reattach the protective cover.

5. Printer Setup

• Always turn off the printer and disconnect the power before installation to avoid damage from hot-swapping.
• Loosen the fixing screws, remove the old hot end, and install the new Call3D 2.0Pro Hot End.
• When connecting the wires, ensure the connector is properly aligned and both rows of pins are fully inserted. Check for loose connections and press firmly to secure.
• When tightening the screws, first fasten one side to about 80-90% tightness, then do the same for the other side, and finally fully tighten both sides evenly.

6. Heat and Secure

Turn on the printer and heat the hot end to 200°C.

• Adjust the heat bed position slightly to create more operating space.
• Use a tool to clamp the hot end (avoiding the ceramic heating element to prevent damage) and tighten it by turning to the right.
• After tightening, turn off the printer and reattach the protective cover.

7. Calibration (Critical Step)

Final Notes