Newsletter: Axis accuracy of ±1µm: essential for automatic bond testing

31 July 2015

Although a well-established technology the majority of bond tests are deficient. The reason stems from the evolution of a manual machine into an automatic one. In a manual tester the operator aligns the test tool to the bond. This requires fine control of small movements but not ultimate accuracy. Many of these systems rely on rotary encoders fixed to their drive motors. This does an adequate job of positioning the motor but backlash and hysteresis in gearboxes, lead screws and linear guides induce very significant errors. Errors of ±50µm are common. The XYZTEC Condor Sigma platforms all use linear encoders and have a positioning accuracy of ±1µm.

The Sigma direct drive motor and linear encoder ensure ±1µm accuracy.

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