A1 series Toolhead

This article provides the guidelines and precautions for the disassembly and assembly of the A1 Print Head. The removal of replaceable parts involved can also be found in this article.

Parts List

The following are the parts involved in this guide.

Module List

Below are the modules that can be further disassembled but will not be displayed in this article.

Screw List

Tool List

Flat-head Tweezers

H1.5 /H2.0 Hexagonal Wrench

Safety Warning


It’s crucial to power off the printer before performing any maintenance work on the printer and its electronics, including tool head wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electronic damage and safety hazards.

When you perform maintenane or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electronic components while the printer is still on. This can damage the electronics of the printer and cause further damage.

Therefore, it’s essential to switch off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer’s electronics. By doing so, you can avoid potential damage to the printer’s electronic components and ensure that the maintenance work is performed safely and effectively.

If you have any concerns or questions about following this guide, open a new ticket in our Support Page and we will do our best to respond promptly and provide you with the assistance you need.

Video Guide

Disassemble the Toolhead

Step 1 – Remove the Hotend Assembly

(If the filament is in loading status, please use the filament cutter to cut off it first)Press the Toolhead Cover from both sides to unlock and remove the cover, be careful not to press on the hotend fan. Pull the protrusion on the side of the Hotend Silicone Sock with your hands, and remove the Hotend Silicone Sock;

Release the hotend latch, then hold the heat sink with your hands and take out the hotend.

Step 2 –  Disconnect the USB Connection

Press down on the PTFE Tube Connector with one hand and pull out the tubes with the other hand; Disconnect the USB cable from the Print Head by removing the 4 screws A with a H1.5 Allen key.

Step 3 – Remove the Tool Head Rear Cover

Remove the Print Head Rear Cover through the notch underneath the Print Head; Use tweezers to push and remove both sides of the wire covers, taking care not to damage the wires inside.

Step 4 – Remove the TH Board

Please refer to the description of each connector in the following figure to understand their use:

1. Hotend Heating Assembly;   2. Filament sensor;   3. USB Cable;   4. Extruder Motor;   5. Hotend Cooling Fan;   6. Worm Flow Coil;   7. Part Cooling Fan.

Disconnect the 4 connectors for the Hotend Heating Assembly, Extruder Motor, Part  Cooling Fan, and Hotend Fan in turn; unscrew the 2 Screws B with an H1.5 Allen key and loosen the Worm Flow Coil connecting wire.

Unscrew the 3 screws C with a H1.5 Allen spanner, remove the TH Board, loosen and disconnect the Filament Sensor FPC Cable.


Step 5 – Remove the Extruder Module

Remove the Extruder Module by unscrewing 2 screws D and 2 screws E with an H2.0 Allen key.

Step 6 – Remove the Hotend Cooling Fan and the Part Cooling Fan

Remove the Hotend Cooling Fan by unscrewing the 2 screws F with a H1.5 allen key.

Remove the Part Cooling Fan by unscrewing the 2 screws G and 1 screw C with an H1.5 allen key.

Step 7 – Remove the Hotend Heating Assembly

Remove the Hotend Heating Assembly by unscrewing the 3 screws H with a H2.0 allen key.

Step 8 – Remove the Print Head Block Bracket

Unscrew the belt tensioning screws I and the anti-rotation plate with an H2.0 Allen Key; Loosen a total of 4 belt block fixing screws J on the left and right sides to loosen the synchronous belt.

Remove the Print Head Block Bracket by removing the 4 screws K with an H2.0 Allen key.

Assemble the Toolhead

Step 1 – Install the Print Head Block Bracket

Mount the Print Head Block Bracket to the X-axis slider and lock in 4 screws K to hold it in place.

Attach the X belt to both sides of the bracket, securing the right side first with 2 screws J and then the left side with 2 screws J.

Slide the Print Head Block Bracket back and forth to make sure the movement is smooth; Install the anti-rotation plate and lock it with the screw I.

Step 2 – Install the Hotend Heating Assembly

Install the Hotend Heating Assembly to the Print Head Block and tighten 3 screws H to secure it.

Step 3 – Install Hotend Cooling Fan and the Part Cooling Fan

Install the Part Cooling Fan by locking 1 screw G on each side of the fan and 1 screw C in the rear.

Install the Hotend Cooling Fan and secure it with 2 screws F.

Step 4 – Install the Extruder Module

Install the Extruder Module to the Print Head Block, taking care not to press on the connecting wires, and secure it with 2 screws D at the top and 2 screws E at the bottom.

Step 5 – Install the TH Board

Connect and snap the Filament Sensor FPC Cable to the corresponding connectors on the TH Board.

Mount the TH Board to the Print Head, taking care not to press on other cables, and then tighten the 3 screws C to secure the TH Board.

Lock 2 screws B to secure the coil connection wires.

Connect the Hotend Cooling Fan, Part Cooling Fan, Extruder Motor, and Hotend Heating Assembly cables in sequence to the corresponding connectors of the TH Board.

Step 6 – Install the Print Head Rear Cover

Check the cables and make sure the installation direction is correct and then install the wire covers on both sides in place.

Check the position of the Print Head Rear Cover notch and press the cover into place after confirming that the installation direction is correct.

Step 7 – Connect the USB Cable

Connect the USB cable to the through-hole above the Print Head per the direction of the cable slot and tighten 4 screws A to fix it.

Step 8 – Install the Hotend Assembly

Open the quick-release device, hold the nozzle heat sink, align the mounting position, mount the nozzle in place, and snap the quick-release device.  

Put on the Hotend Silicone Sock and install the Print Head Front Cover.

Verify the functionality

Start up the printer, confirm that the printer can be started normally, operate on the screen, run a device calibration, and confirm that the hot end temperature, fan, extruder, etc. are working properly.


Not required

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