Measuring the thickness of metal parts (speaker center caps)

Detecting overlapping metal speaker parts (center caps)

Speakers have a dome-shaped metal part (known as a center cap) with a thickness of approximately 30 μm at their center. You wish to prevent speakers from being assembled with two overlapping caps.

[Issue] The metal parts (center caps) are thin.

Because the metal parts (center caps) are very thin, it’s not possible to detect two overlapping caps using assembly equipment or during exterior appearance inspections after assembly. You wish to detect overlapping caps at the time the parts are supplied.

[Solution] Install Micro Laser Distance Sensors above and below the detection target and use them to measure thickness.

Install two HG-C Series Micro Laser Distance Sensors above and below the dome-shaped center cap and measure its thickness.

If the measurement is more than 15 μm 0.591 mil greater than the thickness of one cap (30 μm) (resulting in a measured value of 45 μm　or greater), determine that two caps are overlapping.

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)!

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.