Issue Description

When this issue occurs, the laser head fails to return to the home position properly. You may see the laser head keep crashing into the structure of the device, or it simply won't work. If the device is connected with xTool Studio in the meantime, you may see a pop-up notification like below.

Possible causes

• X-axis limit detection abnormality
• The laser head cannot reach the far left position
• Loose connection on the Z-axis adapter cable
• Faulty X-axis motor or connection cable
• Faulty cable inside the drag chain

1. Check the X-Axis Limit Sensor

(1) Please make sure to connect xTool P2/P2S through USB.

(2) Open your browser and select the link that corresponds to your operating system.

• For Windows: http://201.234.3.1:8080/cnc/cmd?cmd=M110S4&force=1
• For Mac: http://201.234.4.1:8080/cnc/cmd?cmd=M110S4&force=1

(3) Input the link in the address bar and press "Enter" to unlock the X-axis and Y-axis motors:

(4) Remove the magnetic cover of the laser head.

(5) Move the laser head left and right manually and observe whether the indicator of the Z-axis homing signal changes.

(6) If the indicator does not change, it means the Z-axis adapter board is faulty. Please replace the Z-axis adapter board.

• P2

• P2S

2. Check the Limit Spacer and Sensor Probes

Symptoms:

• The laser head cannot reach the far left, and the limit spacer fails to get into the probes.
• The laser head repeatedly hits the left frame of the device for approximately ten seconds.
• The X-axis homing signal indicator does not illuminate.

Solutions:

(1) Remove the magnetic cover of the laser head.

(2) Inspect the limit spacer and sensor probes for signs of deformation. Straighten them if needed.

(3) Check for any objects hindering the laser head's movement, such as cable ties or cables from the fire safety set. If any are present, arrange the cables.

(4) Pull the laser head manually to verify whether the limit spacer can get into the probes.

3. Clean the X-Axis Guide Rail

(1) Clean the belt, guide rails, pulleys, and fixed pulleys on both sides of the X-axis, especially the debris, dust, and other impurities. They may seriously affect the normal operation of the X-axis.

(2) If the laser module collides with the device edges during processing, or if there is displacement along the X-axis when laser engraving, in addition to following the above cleaning steps, the processing speed or density should be reduced.

4. Check the Z-Axis Adapter Cables

(1) Remove the magnetic cover of the laser head.

(2) Check the 6-pin connector cable as shown below for looseness and try to re-plug the cable.

• P2

• P2S

5. Check the Cable or the Motor

(1) Move the laser head to the center position before powering on, and observe whether the laser head can move smoothly to the left or slowly move a short distance to the right.

(2) If it can, the motor is functioning properly. If the laser head does not move or moves with noticeable shaking, refer to the figure below to reconnect the motor cable, then repeat the above steps for testing. If the issue persists, the motor or the motor cable itself may be faulty and needs to be replaced.

If None of the Above Works

Check the Cables in the Drag Chain

• If the cable is obviously broken or damaged, take a photo of the damaged area and send it to xTool tech support.
• If not, continue troubleshooting other possible causes.

Check the Electrical Connectivity of the Connection Cable.

(1) Please refer to the article to remove the casing: 
P2: Remove the Casing of xTool P2 Laser Engraver

P2S: Remove & Install the Left Plate for xTool P2S

(2) If you have a multimeter, please use it to check the electrical connectivity of these cables.

(3) If the cable is broken or damaged, please contact the after-sales support team to obtain a replacement cable, and replace the cable according to the following link:

Replace the Cables of the Z-Axis Adapter Board of xTool P2.

(4) If you have followed the instructions above and the issue is still not resolved, please read the article in the link below, collect the troubleshooting steps you have taken, and contact xTool tech support for further advice: Information That User Can Provide for Troubleshooting.