October 2009

A New Way to Gauge High Accuracy with SPC

Combining a highly accurate CERTO length gauge with an ND 287 digital readout (DRO) equipped with Statistical Process Control (SPC) enables HEIDENHAIN Corporation to offer a powerful new inspection system to the market. Since the new universal HEIDENHAIN ND 287 also has a card for gauge hookup, it was certain to tie-in with CERTO, an established gauge capable of a large measuring range, including nanometer-level measurement. Common applications for this system are inspection of measuring equipment and gauge block calibration.

The length gauges of the HEIDENHAIN-CERTO program measure ranges of 25 mm at ± 0.1 µm/± 0.03 µm accuracy and 60 mm at ± 0.01 µm/± 0.05 µm accuracy, with the latter accuracies established after error compensation. It permits a significant reduction in the required number of reference standard blocks in inspection processes, and recalibrating becomes much simpler. Alternative inductive gauges have limited measure lengths and accuracies.

When combining HEIDENHAIN-CERTO with the new ND 287 single-axis position display with its many features designed to more fully integrate in a machine data transfer network, the new HEIDENHAIN system becomes an especially powerful tool. The ND 287 itself allows up to four inputs and allows toggling between multiple gauges, sensors and encoders to be done easily. The SPC function gives users the ability to write up to 10,000 measured values to an internal memory and evaluate them statistically.

And with the inclusion of HEIDENHAIN’s CS-200 gauge stand with its highly polished granite surface, tight tolerances are ensured due to the shaft perpendicularity. A vacuum chuck option, consisting of a ceramic suction plate and a diaphragm pump, is available for this system to further increase accuracy by eliminating air gaps during the metrology process.

 

Additional Resources

• More information about HEIDENHAIN Digital Readouts
• More information about HEIDENHAIN Length Gauges