Measuring the height of a desiccant-coated surface (on circuit boards)

Measuring the distance from a dispenser nozzle to a desiccant-coated surface

You wish to coat circuit boards with a desiccant coating of uniform thickness. You wish to reduce variability in the distance from the dispenser nozzle to the circuit board being coated with the desiccant to ±0.3 mm.

[Issue] Variability in the amount of desiccant coating applied by workers

• The amount of desiccant applied varies from worker to worker, making it difficult to realize a uniform coating.
• You wish to automate the process of applying the desiccant coating because it’s difficult to retain workers as a result of difficult working conditions due to factors such as the unpleasant odor of the desiccant.

[Solution] Install a Micro Laser Distance Sensor on the dispenser and use it to measure the height of the circuit board.

Install an HG-C Series Laser Distance Sensor on the dispenser and use it to measure the height of the circuit board.

By controlling the height of the dispenser nozzle based on measured values, you can keep the height of the coated surface uniform.

Contactless testing　　

This setup is capable of contactless testing! It can accommodate measurements of products that are easily scratched.

High-precision measurement

This setup is capable of high-precision measurement with repeatability of 10 μm (when using the HG-C1030)!

Feedback control

Analog output! The sensors support feedback control!

Easy installation

The sensors feature a compact design with a built-in amplifier! Installation is simple.

Lightweight, rugged design

Thanks to their aluminum die-cast enclosure, these sensors are lightweight and rugged! The design reduces elements of instability in measurement precision caused by enclosure deflection and temperature.