The HP-THD touch trigger probe has been designed to take advantage of cutting-edge technology and deliver highly accurate touch trigger probing with styli builds of up to 100 mm. It offers high-precision repeatability and low 3D form error thanks to a highly-innovative opto-mechanical design capable of detecting nanometric movements in the X, Y and Z directions.

Standard probes employ a mechanical switch to create probing points which generate variable force dependant on the direction of probing. This force leads to small form errors sometimes called ‘lobing’. The mechanical design of the HP-THD touch trigger probe overcomes this force and delivers very low lobbing in all six probing directions.

The HP-THD is a modular probe comprised of a body and stylus module; the modules can be changed rapidly without the need for calibration using the existing HR-P passive rack. The probe is also compatible with existing Hexagon extensions and styli.

This article contains the standard force probe module of the compact 6 way touch trigger probe HP-THD:
Unidirectional Repeatability 2σ: 0.3 μm
Form error: 0.8 μm (2D) / 1.3 μm (3D)
Trigger force: 0.07 N (XY plane) / 0.78 N (Z plane)
Overtravel Force (XY plane): 0.13 N
Overtravel Force (Z plane): 1.14 N
Maximum styli length: 30 mm