When you use a blue-light laser module for processing or calibration, the software displays the error code "Auto Measurement Failed." This error may occur in the following scenarios:

• When manually performing Z-axis distance measurement (to measure material thickness).
• When performing automatic distance measurement in automatic mode.
• The laser module fails to descend properly, or an abnormal interruption occurs during measurement.

Possible causes

1. The laser module air nozzle is jammed due to a mechanical malfunction or a foreign object.
2. Dirty air nozzle
3. Misalignment of the nozzle and sensor. During product transportation, excessive shaking may cause the Hall sensor circuit board—which detects whether the nozzle has collapsed—to shift out of position, leaving the nozzle in a triggered state for an extended period and causing the system to make an incorrect judgment.

Troubleshooting procedures

Scenario 1: Excessive material thickness detected (Error Code 100003)

Cause of the problem:

• Lack of lubrication on the Z-axis panel slide rails or guide shafts increases movement resistance, causing the system to determine that the material thickness exceeds the measurement range incorrectly.
• The return spring inside the Z-axis panel is improperly installed, has come loose, or is damaged, affecting the Z-axis's normal descent and return.

Solution:

Refer to the troubleshooting guide at https://support.xtool.com/article/3491.

(1) In the pop-up window, locate and click the Auto Repair button.

(2) Once the automatic repair is complete, please try the automatic distance measurement feature again to see if the error has been resolved.

(3) Click View maintenance tutorial and then use the grease to maintain the device.

Scenario 2: Nozzle maintenance (Error Code 1000002)

1. Check the retraction on the nozzle of the laser module

(1) Power off the device.

(2) Find the nozzle of the laser module (under the laser module).

(3) Gently press the nozzle with your finger to check whether it retracts and extends smoothly. Normally, the nozzle should extend and return to its original position automatically after being pressed.

• If the nozzle does not retract automatically: Please press the nozzle several times (about 10–20 times) to restore its retraction through repeated mechanical movement.
• If the nozzle does not restore after several presses, proceed to Step 2.

2. Check whether the nozzle is dirty

(1) If the air nozzle can extend and retract but automatic measurement still fails, or if there are visible stains on the surface of the air nozzle, remove the air nozzle and clean it.

(2) Use the hex screwdriver included in the packaging to loosen the air nozzle mounting screw, then carefully remove the air nozzle.

(3) Clean the nozzle:

• See the cleaning video.
• Use a clean, lint-free cloth or cotton swab, apply a small amount of anhydrous alcohol, and gently wipe the surface of the nozzle to remove any dust, glue, or smoky residue.
• If necessary, rinse the nozzle with clean water and then dry it thoroughly.

(4) Reinstall the cleaned nozzle in its position, ensuring it is securely installed.

(5) After cleaning, retest the automatic measurement function. If the problem persists, proceed to Step 3.

3. Adjust the position of the nozzle

If you see the pop-up window below, click the View maintenance tutorial to watch the video tutorial on adjusting the laser module nozzle. If you have already seen the video, please skip this step.

You can refer to the video tutorial.

Or you can follow the steps below:

(1) Power off the power supply.

(2) Find the mounting screws on the back of the laser module.

(3) Use a suitable screwdriver to slightly loosen the mounting screws on the back of the laser module (do not remove them completely).

(4) Move the nozzle away from the Hall sensor on the laser module (see the direction of the arrow below).

(5) After adjusting the position, retighten the mounting screws.

(6) Restart the device, run the automatic measurement function, and check whether the error code is resolved.

4. Adjust the Hall sensor of the laser module

Hall sensors are used for detection inside the laser module. The Hall sensor with mounting screws may become loose during shipping, which may lead to Z-axis distance measurement issues.

1. Adjust the Hall sensor sub-board

Refer to the video tutorial (0:00-0:30).

Please use the hex screwdriver provided with xTool M2 to gently tap the Hall sensor sub-board in this location on the laser module. This will help guide the Hall sensor back into the correct position.

If the problem persists after applying the solution, please proceed to the "reinstall the Hall sensor sub-board".

2. Reinstall the Hall sensor sub-board

Refer to the video tutorial (0:30-3:00).

Or you can follow the steps below:

(1) Power off the power supply. Remove the laser module from xTool M2.

(2) Remove the screws on both sides of the laser module and remove the housing.

(3) Use a heat gun to blow air onto the sticker for 1–2 minutes to soften the adhesive backing. You can also use a household hair dryer (set to the highest level) instead of a heat gun.

Note: Maintain a safe distance during heating to prevent overheating and damage to the laser module housing.

(4) After heating, gently peel off the sticker from the laser module.

If you do not have a heat gun or hair dryer but are recommended to use this solution, please contact the xTool after-sales team for further assistance.

(5) Find the four screws on the back of the laser module (as below). Use a screwdriver to remove them.

(6) After removing the screws, carefully remove the entire laser module housing to expose the internal circuit board.

(7) Locate the Hall sensor sub-board inside the laser module (as shown).

(8) Check and adjust the sub-board:

• Check whether the sub-board is tilted.
  1. If the sub-board becomes misaligned or shifts out of place, remove the mounting screws from the Hall sensor.
  2. Readjust the position of the sub-board to ensure it is properly installed and not tilted.

c. Tighten the mounting screws to secure the sub-board.

• Check whether the screws are loose.

If the sub-board is in the correct position but the mounting screws are loose, use a screwdriver to tighten them.

(9) Carefully reinstall the laser module housing in its original position, tighten the four mounting screws on the back, and ensure the housing is securely installed.

(10) Reattach the sticker that you previously removed.

(11) Reinstall the laser module on the device, restart the device, perform a Z-axis calibration, and check whether the error code is disappeared.

5. Contact the xTool after-sales team

(1) If the automatic measurement still fails after completing all of the above steps, it may be due to a hardware failure of the Hall sensor or another mechanical issue.

(2) Please provide the required information below, and contact the xTool after-sales team.

Still experiencing issues?

Should the issue persist after completing the preceding steps, submit a ticket via the "Submit a Ticket" button in the "Help Ticket" section below. The standard response time for xTool Customer Service is one business day.

For a prompt resolution, please include the following details:

• Software and firmware version: The software version of xTool Studio and the firmware of xTool M2 that you use.
• SN number: Find the SN number on the back of the device.
• Video evidence: Attach a video demonstrating the issue, where applicable.
• Device information: Follow the steps to export the work log.

This information is crucial for Mechblock technical support engineers to provide timely assistance.