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How to Install Laser on Genmitsu?

Installing a laser on your Genmitsu CNC machine is one of the best ways to expand its capabilities — from engraving wood and leather to cutting thin materials with precision. If you're considering adding laser functionality to your Genmitsu 3018 (or other models like PROVer or 3018-PRO), this guide will walk you through the essential steps, things to consider, and where to go next.

✅ Whether you're a hobbyist or a professional looking to upgrade, you'll find everything you need to get started — even if you're new to lasers.

🧰 What You'll Need

Before beginning the installation, make sure you have:

  • A compatible laser head (like the PLH3D-XT-50 or PLH3D-XT8)

  • A mounting bracket or adapter plate for Genmitsu

  • Proper power supply (usually 12V or 24V, depending on the laser)

  • A PWM signal connection from your controller (GRBL)

  • Air Assist system (optional, but recommended)

  • Laser safety glasses (OD7+ for 450 nm recommended)

If you're not sure which laser is right for your Genmitsu machine, check out our dedicated Laser for Genmitsu CNC page.

🛠️ Step 1: Mechanical Mounting

  1. Power off your Genmitsu CNC completely.

  2. Remove the spindle or any mounted tool from the Z-axis carriage.

  3. Use the dedicated mounting plate from your laser kit or a 3D-printed adapter to attach the laser head to the carriage.

  4. Make sure the laser is mounted securely and vertically, ideally centered for best results.

🔗 If you're using a Genmitsu 3018 from SainSmart, you can find more info here.

⚡ Step 2: Electrical Connection

Most Genmitsu machines run GRBL firmware and provide a PWM signal via the spindle connector. Here’s what to check:

  • Connect the laser power cable to the external power supply.

  • Connect the PWM control wire to the spindle signal output on your controller (usually the “S” pin).

  • Ensure ground wires are properly shared between power and signal systems.

Always double-check polarity and voltage — wrong connections can damage the laser or your controller.

💡 Step 3: Software Configuration (GRBL & LightBurn)

  1. Make sure your GRBL firmware supports laser mode (version 1.1+).

  2. Enable laser mode in GRBL by sending:

    $32=1

  3. Set maximum spindle speed to match your PWM range, e.g.:

    $30=1000

  4. Use LightBurn, LaserGRBL, or other G-code sender. In LightBurn:

    • Set device as GRBL

    • Adjust laser power and speed in cut settings

    • Use M3/M5 commands for laser on/off

🔗 Want to learn more? Check out our LightBurn software page

💨 Step 4: Optional – Air Assist Setup

Using an air assist significantly improves cutting results and reduces smoke residue. Simply connect a small air pump to the laser’s nozzle and aim it toward the cutting area.

Recommended airflow: 5–10 l/min for Genmitsu class machines.

🧪 Step 5: Test Your Laser

Start with soft materials like cardboard or thin plywood. Use low power settings (10–20%) to test focus and movement. Slowly increase power while observing cut depth and quality.

✅ Summary

Upgrading your Genmitsu CNC with a laser is easier than it may seem. With the right kit, a bit of patience, and proper configuration, you’ll be engraving and cutting in no time.

🔗 Where to Go Next?

👉 See our full Laser Kits for Genmitsu CNC
👉 Learn more about the Genmitsu 3018 compatibility and setup

Need help choosing the right laser or setting it up? Contact our support — we’re happy to assist.

  Posted by Opt Lasers     Genmitsu views (1227)