1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Longer Limit Switch Kit. This kit is designed to enhance the functionality of your Longer RAY5 5W or RAY5 10W laser engraving machine by enabling precise homing and preventing overtravel of the laser module.
Please read these instructions carefully before proceeding with installation to ensure safe and correct usage.
2. Safety Information
- Always disconnect the laser engraving machine from its power source before installing or performing maintenance on the limit switch kit.
- Wear appropriate personal protective equipment, including laser safety glasses, when operating the laser engraving machine.
- Ensure adequate ventilation in your workspace to dissipate fumes and smoke generated during laser operation.
- Keep children and pets away from the laser engraving machine during operation and maintenance.
- Do not attempt to modify the limit switches or wiring beyond the instructions provided in this manual.
3. Kit Contents
The Longer Limit Switch Kit typically includes the following components:
- Limit Switches (2 units)
- Connection Cables (for 5W/10W models)
- Mounting Screws/Hardware
- Cable Ties

Image: Components of the Longer Limit Switch Kit, including two limit switches, connecting cables, and cable ties.
4. Compatibility
This Limit Switch Kit is specifically designed for use with the Longer RAY5 5W and Longer RAY5 10W laser engraving machines.
Note: The version of this kit suitable for the RAY5 20W model does not include the assembly cable. Please ensure you have the correct kit for your specific machine model.

Image: A Longer RAY5 laser engraving machine, representing the compatible device.
5. Setup and Installation
Follow these steps to install the limit switch kit on your Longer RAY5 5W/10W laser engraver:
- Power Off: Ensure your laser engraving machine is completely powered off and unplugged from the electrical outlet.
- Identify Mounting Locations: Locate the designated mounting points for the limit switches on the X and Y axes of your laser engraver frame. These are typically at the extreme ends of the movement range.
- Mount Limit Switches: Securely attach each limit switch to its respective mounting point using the provided screws. Ensure the lever arm of the switch will be actuated by the moving part of the laser module or gantry as it reaches the end of its travel.

Image: A limit switch correctly installed on the frame of a laser engraving machine.
- Connect Wiring: Connect the provided cables to the limit switches and then to the corresponding ports on your laser engraver's control board. Refer to your main laser engraver manual for specific port locations if unsure. Use cable ties to manage and secure the wiring, keeping it clear of moving parts.
- Firmware Update (if necessary): Some RAY5 5W/10W machines may require a firmware update to enable limit switch functionality. If your machine does not recognize the switches after installation, please contact Longer customer support at support@longer.net for the necessary firmware file (e.g.,
Ray5_5W_10W_Limit_Combine.bin) and detailed update instructions. - Test Functionality: After installation and any necessary firmware updates, carefully power on your machine. Perform a homing sequence or manually move the laser module to test if the limit switches are correctly detected and stop the movement at the designated points.
6. Operating with Limit Switches
Once installed and configured, the limit switches provide several benefits:
- Automatic Homing: The machine can automatically find its home position (0,0 coordinates) at startup or when commanded, ensuring consistent starting points for engravings.
- Overtravel Protection: The switches act as physical end stops, preventing the laser module from moving beyond the machine's physical limits, which can prevent damage to the machine.
- Improved Accuracy: Consistent homing leads to better repeatability and accuracy in your engraving and cutting projects.
Refer to your laser engraver's software and control panel for initiating homing sequences and understanding how limit switches are integrated into its operation.
7. Maintenance
To ensure the longevity and reliable operation of your limit switches:
- Regular Inspection: Periodically check the physical condition of the switches and their wiring for any signs of wear, damage, or loose connections.
- Cleaning: Keep the switches free from dust, debris, and laser residue. A soft brush or compressed air can be used for cleaning. Avoid using liquids directly on the switches.
- Mounting Security: Ensure the switches remain firmly mounted. Tighten any loose screws as needed.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Limit switches not detected / Homing fails | Loose wiring connection Incorrect wiring Firmware not updated/configured Switch physically obstructed or damaged | Check all cable connections Verify wiring against diagram Update firmware or check settings (contact support if needed) Inspect switch for damage or obstructions |
| Machine overtravels despite switches | Switch not actuating correctly Switch faulty Firmware/software misconfiguration | Adjust switch position to ensure activation Test switch continuity (if possible) or replace Verify software settings for limit switch functionality |
| Intermittent switch detection | Loose connection Dust/debris on switch mechanism | Secure all connections Clean the switch mechanism thoroughly |
If you encounter persistent issues, please refer to the Support section for contact information.
9. Specifications
- Brand: Longer
- Switch Type: Limit Switch
- Operation Mode: ON-OFF
- Compatible Devices: Longer RAY5 5W, Longer RAY5 10W
- Control Type: Laser Head Movement
10. Warranty and Support
Longer products are backed by a manufacturer's warranty. For specific warranty details, please refer to the documentation included with your original laser engraving machine or visit the official Longer website.
For technical assistance, troubleshooting, or inquiries regarding your Limit Switch Kit, please contact Longer customer support:
- Email: support@longer.net
- Technical Support Phone: +1 888-575-9099
- Support Hours (EST, UTC-5):
- Mon-Fri: 9:00am-6:00pm
- Sun-Thu: 8:30pm-7:00am

Image: Longer Limit Switch Kit, representing the product for support inquiries.





