DBB Guidebook - Hardware
There are now two major DBB manufacturers, Heidenhain and Renishaw, in the market. They offer principally same kind of devices. Anyway there is some differences between them. The most important features are compared in the following table:
Heidenhain ball bar has long measurement range is thus more suitable for robot measurements. This device needs a desktop or ISA slot equipped portable computer for measurements.
Renishaw ball bar has a clever centering system which makes a measurement installation fast to set. When measurement equipment is connected via standard serial cable to computer, an ordinary notebook computer is enough for completing measurements.