Core Technology Breakdown: How Does a Flying Laser Work?
To transition from static to flying marking, you don’t just need a faster laser; you need a system that can “feel” the speed of your production line. This is achieved through the synergy of two components: the Sensor and the Encoder.
A. The Sensor: The “Eyes” (Arrival Detection)
The sensor is typically an infrared or photoelectric eye positioned upstream from the laser.
- Its Role:It tells the laser controller, “The product is here!”
- The Workflow:As the edge of a box or bottle breaks the sensor’s beam, it triggers the marking sequence.
B. The Rotary Encoder: The “Brain” (Speed Tracking)
This is the most misunderstood component of a flying laser system. A laser beam is essentially a point of light moving via mirrors. If the object underneath is moving, the laser must move with it to keep the mark from stretching or blurring.
- Its Role:The encoder is a wheel that sits on the conveyor belt or the drive shaft. As the belt moves, the encoder spins, sending thousands of electronic “pulses” per second to the laser.
- The Magic:If the conveyor slows down or speeds up (due to motor fluctuations or load changes), the encoder reports this instantly. The laser’s internal mirrors (galvanometers) adjust their path in microseconds to match the belt’s exact speed.
Without an encoder, “on-the-fly” coding would be nothing more than a guess. The encoder synchronization feature ensures that your 0.5-millimeter dates, batch numbers, or serial numbers remain clear and undistorted, even when the conveyor belt is running at 80 meters per minute.