R-Test: 5-Axis Machine Tool Metrology

In modern workshops, the application of five-axis machining is becoming increasingly common. To machine workpieces with sufficient accuracy, the real position of a rotary axis with respect to the other machine’s axes must be known accurately. This generally requires a considerable measurement effort.

IBS Precision Engineering has developed an innovative measurement system with which the location of a rotary axis can be determined with a high level of accuracy: the “R-test.”

Using a 3-planar-surface probe, the location of a 22 mm diameter ball can be determined accurately in the 3 dimensions of X, Y and Z simultaneously. This probe measures the real position of the centerpoint of a Masterball, which is mounted to the rotating part of the machine. The probe is fixed to the non-rotating part of the machine and its readings are displayed on a laptop near the machine.

More Information on 5-Axis Machine Tool Alignment

Read the 5-axis alignment article in American Machinist

Download the 5-Axis R-Test Video (Windows Media Player, 16Mb)