Keyence XG-8700L Multi-camera Vision System for Inspection

The Keyence XG-8700L is a high-speed multi-camera imaging system from the XG series, specifically designed for automated visual inspection tasks such as breakage detection and missing parts verification. The controller can manage up to four independent camera heads simultaneously, processing images in parallel to achieve high throughput on production lines. It incorporates advanced pattern matching, edge detection, and contour analysis algorithms tailored for manufacturing environments.

Controller Specifications

The XG-8700L main unit is built around an Intel Core i7 processor (2.5 GHz) with 4 GB DDR3 RAM and 32 GB SSD for program and image storage. It runs the Keyence XG VisionEditor software embedded on Windows Embedded Standard 7. The controller provides four camera ports (IEEE 1394b / FireWire, 800 Mbps) with Power over Camera (PoC) support, delivering up to 12 VDC to each camera. It also includes six general-purpose trigger inputs (24 VDC) and eight high-speed outputs (NPN/PNP configurable, 100 mA per channel).

Inspection Capabilities

The system's core strength lies in its library of 200+ inspection tools:

• Missing parts detection via area comparison and histogram analysis.

• Breakage detection using contour search and crack measurement (sensitivity 0.1 mm).

• Edge presence verification (e.g., missing screws, broken drill bits).

• Surface defect detection (scratch, dent, burr) with adaptive thresholds.

Up to 100 inspection programs can be stored on the SSD, with program switching time<50 ms. The system can process up to 400 parts per minute per camera at VGA resolution (640x480).

Camera Options

Compatible cameras include the Keyence CA-HX series (monochrome) and CA-HF series (color). Maximum resolution: 5 megapixels (2560x1920) with 15 fps. For high-speed applications, VGA cameras at 150 fps are supported. The XG-8700L automatically calibrates each camera’s lens distortion and shading correction. External lighting can be controlled via the built-in strobe output (24 VDC, 100 ms pulse max).

Communication and Integration

The controller includes:

• Ethernet (10/100/1000) for PLC connectivity (EtherNet/IP, Modbus TCP, PROFINET).

• RS-232C (9-pin) for serial command interface.

• USB 2.0 host for exporting inspection logs.

• VGA output for monitor display.

Image results (pass/fail, measurement values) can be transmitted to a PLC via cyclic data exchange (max 1024 bytes). The controller also supports FTP transfer of failed images to a server.

User Interface and Programming

Programming is done via the XG VisionEditor (PC based) with drag-and-drop flowchart. The system supports multi-camera synchronization using an external trigger signal (5–24 V). Each inspection tool can have custom region of interest (ROI) and pre-processing filters (median, binarization, Sobel edge). A simulation mode allows offline program development using stored images. The runtime environment includes a password-protected maintenance mode and operator dashboard with pass/fail trend graphs.

Power and Environment

Supply voltage: 24 VDC ±10% (24 watts typical, 50 watts max with four cameras and strobes). The unit is fanless, operating temperature 0 to 45°C, humidity 35% to 85% non-condensing. Dimensions: 120 mm x 150 mm x 90 mm (excluding connectors). Weight: 1.2 kg. Mounting: DIN rail or direct screw. Protection class: IP20. The controller meets CE, FCC Part 15, and RoHS.

Breakage and Missing Parts Algorithms

For breakage detection, the system uses a patented “flaw edge tracking” algorithm that follows the contour of a part and detects deviations >0.2 mm. Missing parts detection utilizes “color area extraction” or “binary area count.” The system can learn a reference image and then compare each new sample. For transparent or shiny parts, the system supports polarized lighting control to reduce glare. Multi-angle lighting (ring light, bar light) can be sequenced to highlight different features.

Data Logging and Reporting

Inspection results are stored in SQLite database on the internal SSD. The controller records timestamps, operator IDs, camera parameters, and failed images. A web-based report generator (HTML/CSV) can be accessed via Ethernet. The system also supports exporting data to USB stick or network share. Up to 100,000 inspection results can be stored before automatic overwrite (circular buffer).

Ordering Information

Model number: XG-8700L. Accessories include camera cable CA-C3 (3 m), power supply CA-DC24E, and mounting brackets. The system is supplied with a 2 GB microSD card for software backup. Detailed user manual (Part No. 98M0816). The product is intended for use in industrial machinery under IEC 61131-2.