1. Installation & Preparation for Inline UV Laser Marker

Complete these critical steps before powering on the R6-U inline UV laser marking machine to prevent damage.

The red blocks stabilize the laser head during transport. Refer to the diagram inside the wooden box or machine door.

Cooling System Requirements for PCB Laser Marker

• Water Type: Use ONLY distilled water or purified water. Tap water impurities will damage the UV laser source.
• Cold Weather: Add antifreeze in freezing conditions to prevent pipe rupture.
• Power & Signal: Connect cables securely according to labels.

2. Software Operation and Calibration for R6-U PCB UV Laser Marker

The Jinghe control software features three core modules: Main Interface, Recipe Management, and Calibration.

Key Functions in UV Laser Engraving Software

• Recipe Management: Save parameters for different PCB products as "Recipes" for rapid switching in high-volume production.
• Laser Position Calibration: Fix marking offsets.

  Calibration steps: Open the "Laser Position" tool and click the crosshair to align the software preview with the actual laser point.

• CCD Vision Alignment: Uses fiducial marks for precise positioning. Ensure the camera clearly detects board marks.

3. Achieving Optimal PCB Marking Results with R6-U UV Laser

UV lasers provide "cold marking" with minimal heat-affected zone, ideal for sensitive electronics. Balance speed and quality through parameter adjustments for laser engraving precision.

Parameter Adjustment Guide for High-Precision Laser Engraving

• Power & Depth: Increase power (10–20) for deeper, clearer QR codes and barcodes.
• Filling Spacing:
  • Smaller spacing (0.01–0.03mm) = Higher density = Clearer mark = Slower cycle.
  • Larger spacing (0.05mm+) = Faster processing = Lighter mark.
• Frequency: 30–50kHz typical for PCB materials.
• Vision Lighting: Adjust "Light Source" tool for optimal CCD recognition.
• Recommended Starting Settings: Power 12–15, Speed 1000mm/s, Frequency 40kHz, Hatch 0.02mm.

4. Basic Operation of the Laser Engraving Machine Software

Key Points for Inline UV Laser Software

• Software Interface Overview
  Explains the main interface, toolbar, and user recipe system used to manage different product settings.

• Manual Motion Control
  Demonstrates manual X and Y axis movement, including quick movement functions for efficient setup and adjustment.

• Conveyor Track Adjustment
  Covers track height and track width adjustment to fit different PCB sizes.
  Track reset is rarely needed and should only be used if the belt has been manually moved.

• Camera and Lighting Control
  Introduces camera on/off and magnification functions for better visual inspection.
  Emphasizes the difference between:

  • External lighting for visual adjustment

  • Program lighting defined in the recipe, which is used during actual operation

• PCB Loading and Unloading
  Explains PCB loading, unloading, and support structure to ensure stable and accurate positioning.

• User Account Operation
  Shows how to log out of the software system.

5. Step-by-Step Guide to Programming a Laser Engraving Machine for Marking QR Codes on PCB White Solder Mask Using UV Laser

Key Steps:

1. Startup & PCB Loading
   • Admin login (password: 1234), handle origin return and interference check.
   • Set PCB width (e.g., 200mm), auto-adjust channel, load PCB.
2. QR Code Template Creation (Main Focus)
   • Path: Recipes → Barcode Template → New.
   • Type: Data Matrix (tiny/harsh environments) or QR Code (mobile scanning).
   • Size: 4–6mm, center at X/Y=0.
   • Engraving Mode (Critical for White Mask): Fill mode (default), enable fill, average line distribution, spacing 0.03–0.05mm.
3. Content: Combine fixed text + timestamp + serial number (starts at 1).
4. Laser Parameters (Essential Tuning)
   • Speed: 1000.
   • Frequency: 20–40; Pulse width: 10–30 (product <990).
   • Delays: 0, 150, 150, 50.
   • Iterative manual testing until clear/scannable.

Key Principle: Prioritize actual marking results; use fill mode for white oil UV engraving. Covers single template only.

6. Main Workflow for PCB QR Code Engraving with Inline UV Laser

1. Load Template & Setup
   • Load saved QR code template (e.g., "AA") into a new program.
   • Confirm PCB dimensions (300 × 200 mm).
   • Enable QR code detection, batch engraving in same field of view, and prevent secondary engraving.
   • Place PCB in machine and capture full image.
2. Set Alignment Marks
   • Create two marks (upper-left and lower-right corners).
   • Center mark in view, adjust lighting (channel 2 for marks, channel 3 for QR codes).
   • Draw tight blue box around mark, set contrast (70–80) so red lines fully enclose feature, expand search range.
   • Second mark inherits lighting from first.
3. Position QR Codes
   • Single PCB: Manually place QR codes.
   • Multi-panel: Use array placement.
     • Set rows/columns (e.g., 9 × 2), choose shortest path.
     • Define spacing with three reference points (first panel, X-axis, Y-axis).
4. Verify & Save
   • Save program with custom name.
   • Re-recognize marks and check QR code positions; adjust offsets with WASD keys if needed.
5. Engrave
   • Machine detects and engraves multiple QR codes simultaneously in CCD view.
   • Completed PCBs exit automatically.

7. Tutorial on the Template Editing Window of Laser Engraving Software

Most Frequently Used Tools:

• New / Open / Save template
• Select all, copy, delete, center to canvas, rotate (angle adjustment is very common)
• Multi-object alignment: left/center/right + top/center/bottom + horizontal/vertical distribute with spacing (e.g. 0.5 mm)

Critical Warning (must remember): Never combine or group QR codes / barcodes with other objects → they become plain images → content & data become uneditable and parameters invalid.

Common Elements:

• QR code (most used)
• 1D barcode (Code 128 A/B common, usually rotated 90° vertical, small data capacity → becomes very long, can compress but may affect readability)
• Import DXF files (for logos, artistic text, complex vector graphics)

Practical Advice:

• Test parameters yourself extensively
• Contact Customer service personnel if unclear

One-sentence summary: Master alignment + rotation + centering, never merge barcode objects, use DXF for complex designs — these cover ~80% of daily template editing work.

8. Setting Up Bad Mark for Automatic QR Code Skipping on Defective PCBs

This tutorial demonstrates how to set up the Bad Mark (defective board skip) function on a laser engraving machine for panelized PCBs, so the machine automatically engraves QR codes only on good boards and skips defective (NG) ones to maintain continuous serial numbering and improve efficiency.

Key Points (Core Teaching Content)

1. Working Principle
   • Uses the "Good board marker" mode (most common): If the machine detects the white square marker → engrave QR code. If no marker is detected → skip engraving (i.e., treat as bad board).
2. Setup Steps
   • Create a good board marker (white square shape template) + corresponding QR code template (one marker controls one QR position).
   • Place markers away from QR codes and other patterns to avoid interference.
   • Keep search range small to prevent misrecognition.
   • For multi-panel boards: create one unit (marker + QR), select both, then array them (e.g., 9 rows × 2 columns) using reference points.
3. Real Testing & Debugging
   • Simulate bad boards by covering white squares with black tape.
   • Run the job: white marker present → QR engraved; no marker → skipped.
   • Common failure: poor recognition → fix by
     • adjusting light source brightness
     • modifying binarization/threshold parameters
     • reducing search range
     • recreating the marker
   • After tuning, the machine reliably identifies bad boards and skips them, keeping QR codes sequential.
4. Additional Notes
   • When all boards are good, disable the bad mark check to engrave directly.
   • The machine alarms if a QR code already exists at the target position (prevents duplicates).

One-sentence summary: This video teaches how to configure Bad Mark on a laser marker so it intelligently skips engraving QR codes on defective PCB panels, ensuring serial number continuity — with emphasis on precise marker creation and parameter fine-tuning for stable recognition.

9. Technical Specifications (Model: R6-U)

10. Troubleshooting Common Issues with R6-U UV Laser Marker

• Faint or unclear marks: Increase power/frequency or decrease filling spacing. Test on scrap material.
• Misaligned marking: Recalibrate laser position and CCD fiducials.
• CCD vision errors: Clean camera lens and optimize light source brightness.
• No laser output: Verify water chiller, connections, and removal of red fixing blocks.
• Software crashes: Restart PC and ensure Windows updates are compatible.

11. Safety Precautions for Operating Inline UV Laser

• Always wear UV laser safety glasses (OD 4+ for 355nm).
• Ensure proper ventilation for any material fumes.
• Never bypass safety interlocks or operate with covers open.
• Keep hands clear of conveyor during automatic operation.

12. Comparison with Top Competitors in UV Laser Marking

Data from 2026 reviews shows R6-U ranks high for industrial efficiency, outperforming desktops in throughput.

13. Case Study: R6-U in Electronics Manufacturing

In a 2026 deployment at a Shenzhen-based PCBA factory, the R6-U reduced marking errors by 40% and boosted throughput to 500 boards/hour. Using CCD alignment and recipe management, operators achieved 100% traceability for automotive clients, complying with ISO standards. This demonstrates the machine's expertise in high-precision applications, backed by Jinghe's 10+ years in laser technology. For similar success stories, reference industry reports from MarketsandMarkets.

14. Frequently Asked Questions about R6-U UV Laser Marker

Additional Resources for R6-U Users

Download R6-U User Manual for detailed guides.

Request a Free Demo to see the R6-U in action.

Explore more UV laser products for your SMT needs.