Client's Issues
The "contact-type displacement sensor" has been used for measuring the height of the nozzle of dispenser with adhesive, however, the device was expensive and this was a financial burden.
The nozzle height measured before applying adhesive is provided for the feedback on the values to the machine, however, the 1 μm or better high accuracy is required also for controlling the amount of application precisely.
With the adhesion application of tempered glass for smartphones expanding, the client's company found a sensor that can measure the nozzle height at low cost and contacted us.
- Contact displacement sensor is expensive.
- Repeatability of 1μm or more is needed.
Metrol's suggestions
For a measurement in automated lines for detecting constant positions, the number display (displacement measurement) is often unnecessary, and "Contact-type displacement sensor" gives the dispenser overperformances for such application in many cases.
Metrol's "precision positioning switch" can detect the nozzle height with high accuracy ON/OFF signals.
Though the accuracy of the switch is the same as that of contact-type displacement sensor, the switch can reduce the cost to about 1/10.
Furthermore, the contact tip material can be changed to resin to reduce the contact force, so there is no risk of scratching the tempered glass for smartphones.
- Reduced the cost to 1/10 by eliminating the number display.
- Realization of repeatability of 1μm.
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