The Position Limit Won't Work

Article author
xTool Customer Service

This article applies to:
D1 Pro with all laser modules.


Issue Description

D1 Pro is equipped with position limit switches. When the laser module moves close to the machine frame, the sensor on the switch will be triggered to prevent a collision. This will also trigger the buzzer and an alarm message will show on the XCS software.

If the buzzer is not triggered when the laser module hits the frame during processing or homing, it could be a limit switch issue. Please follow the instructions below to troubleshoot.position_limit_alarm.png


#1 Check the XCS Setting

  1. Check if the limit switch is disabled in the XCS setting.
  2. Please refer to the picture below to enable it.


#2 Check the Connection Cable

On the motherboard, there is a yellow port for the limit switch cable (shown in the picture below). Make sure the cable is fitted in the port properly, otherwise a signal may not go through, and the position limit won't work.






In case the cable is loose, power off the machine, replug the limit switch cable, turn it back on, and see if it works.

#3 Check the Limit Switch

On each of the limit switches, you will find a fork-shaped sensor. It's for the trigger piece to go in and create a signal. If the sensor is broken, it won't be able to detect the trigger piece. In this case, please contact us and send us videos or photos to confirm. We will see if a replacement is needed.


If something is in between the limit switch and the trigger piece, or if the sensor is stained, it may not detect the trigger piece. If that's the case, please refer to the pictures below to reroute the cables or clean the sensor.




#4 Check the Trigger Piece

For the position limit to function properly, the trigger piece must be able to enter the space between the fork-shaped part (shown in the picture below). If the relative position of the two is not correct, the signal can not be formed.


To make sure they can be in the right relative position, please check:

  • If the trigger piece is bent or distorted.
  • If the trigger piece is set to the right position level in accordance with the laser module.

For more details, refer to the link below.

Adjust the Y-Axis Limit Trigger Piece


If None of the Above Works

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.

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