Purchase now: Wenglor WM03PCT2 Print Mark Reader
Purchase now: Atlantech Drives provides you the Wenglor WM03PCT2, a highly specialized Print Mark Sensor (also known as a Contrast Sensor) designed for the packaging and printing industry. Unlike standard photoelectric sensors, this device uses a pulsed White Light emission. This is crucial because white light contains all spectral colors, allowing the sensor to reliably detect print marks of *any* color (including yellow or red marks) against any background color. It is the industry standard for controlling cutting, folding, and sealing operations on continuous web materials.
Technical Specifications and Teach-In Accuracy
The WM03PCT2 features a compact housing with a working range of 12 … 18 mm. It is equipped with a Teach-In button for rapid setup, allowing the user to «teach» the sensor the mark and the background in seconds. With a switching frequency of 5 kHz (response time 100 µs), it keeps up with high-speed production lines. The spot size is extremely small (1.5 x 2.5 mm), ensuring that even the thinnest registration marks are detected without jitter.
- Part Number: WM03PCT2.
- Sensor Type: Print Mark Reader (Contrast).
- Light Source: White Light (LED).
- Working Range: 12 … 18 mm.
- Switching Frequency: 5 kHz.
- Setting: Teach-In / External Teach.
- Output: PNP / NPN (Configurable).
- Connection: M12 x 1, 4-pin.
- Protection: IP67.
Expert Tips: Detecting Yellow Marks
Yellow marks on white backgrounds are the nightmare of standard sensors. Expert Tip: A standard Red LED sensor cannot see a yellow mark on white paper because yellow reflects red light almost as well as white does. The WM03PCT2 solves this by using White Light. Since the yellow ink absorbs the blue component of the white light, the sensor sees a clear contrast drop. Always use this White Light model for «low contrast» applications where color combinations change frequently.
Frequently Asked Questions (FAQs)
Q: How do I teach the sensor?
A: It uses a dynamic 2-point Teach. First, align the spot on the background and press the Teach button. Then, move the spot to the print mark and press again. The sensor automatically calculates the optimal switching threshold.
Q: Can it detect glossy foils?
A: Yes, but you should mount the sensor at a slight angle (approx. 15°) relative to the foil to avoid direct specular reflection (glare) blinding the receiver.
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