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Q&A Improvement Case Studies

?Contact displacement sensors used for measurement inside CNC cylindrical grinding machines cannot survive the harsh internal environment.

Hello, I am an engineer with a machine tool manufacturer.
I design machines dedicated to semiconductor manufacturing (CNC cylindrical grinding machines).

We use contact displacement sensors with a value display function to measure the outer diameters of ingots before and after grinding.

The measured values are then fed back to the equipment for after-process inspection. However, we are experiencing difficulties because sensors are affected by coolant, scattering chips and dust inside the grinding machine and that causes malfunction.

In addition, the required display unit is costly.

To achieve 1 μm-precision measurements in adverse environments, contact-type devices are necessary. Do you have any solution for this?

!Is value indication really necessary? Leave ON/OFF position signals to the digital scale of the equipment.

Thank you for your inquiry.
Leave outer diameter measurement for workpieces inside CNC cylindrical grinding machines to Metrol.

Are displacement sensors with a value display function really necessary for the outer diameter measurement for ingots inside machine tools?

The Metrol touch probe-type precision positioning switch is designed exclusively for machine tools.
By measuring high-precision ON/OFF position signals with a digital scale of the equipment, the outer diameter of ingots can be measured without using a value display unit.

In addition, the touch probe-type precision positioning switch is immune from coolant, scattering chips and dust and can achieve 1 μm repeatability in such adverse environments.
It has been introduced widely for inner and outer diameter measurement and the centering of workpieces by major machine tool manufacturers.

Please try contacting Metrol about its precision positioning switches.