System takes on-machine probing to new lengths
The optical system combines sub-micron repeatability with 12-m (39-ft) transmission range and 360-deg signal coverage from any spindle orientation. The system allows operators of very large, five-axis machine tools such as aerospace gantry profilers to verify critical features in process, achieve tighter tolerances for more precise fits, and even perform final inspection while the part is still on the machine tool.
The system uses a high-power infrared transmitter, modified optical receiver, and machine interface with high-speed digital switch while retaining much of the engineering that went into Renishaw's MP700 probe, the company says. Strain-gage trigger design minimizes pre-travel variation and its effects on probing precision to provide unidirectional repeatability of 0.000010-in. (0.25 µm) with a 2-in. (50-mm) stylus.
Renishaw says the unit's solid-state construction increases probe life tenfold, while strain-gage sensors deliver low trigger force and a uniform 3D triggering pattern. This allows faster probing on complex parts while eliminating the programmer's requirement to compensate for lobing characteristics that can affect probing precision.
A multi-channel digital filter recognizes and ignores unintended triggers resulting from machine vibration and high acceleration/deceleration forces. This feature makes the MP700E particularly suited to high-speed and high-power machining centers, according to Renishaw.
The high-power system is designed for applications requiring extended range transmission up to 12-m, environments which are not conducive to the use of RF transmission, or tilt-spindle applications which position the probe at complex vectors that traditionally result in loss of an optical signal.
<%=company1%>, 5277 Trillium Boulevard, Hoffman Estates, IL 60192 USA. Tel: 847-286-9953. Fax: 847-286-9974.
With contribution from Jim Destefani
Managing Editor, Tooling Online