Revo™ is a dynamic new measuring head and probe system from Renishaw.
A revolutionary new product designed to maximise CMM throughput whilst maintaining high system accuracy. 
Unlike conventional scanning methods, which rely on speeding up the motion of the CMM's 3 axes in order to scan quickly, Revo™ uses synchronised motion, and Renscan5™ five axis scanning technology, to minimise the dynamic errors of CMM motion at ultra high scanning speeds. 
Up to 500 mm/s is possible without accuracy penalties.
The Revo™ measuring head features ultra stiff spherical air bearing technology in each of its two axes, this provides a stiff metrology platform.
The two axes are driven by state of the art brushless motors that are linked to 0.08 arc-sec high-resolution encoders to provide fast ultra-high accuracy positioning.
A highly innovative probe mounted to the Revo™ measuring head further minimises the errors caused by the dynamic effects of high-speed motion and allows the use of long styli without reducing accuracy.
A laser light system is used to accurately measure the exact position of the probe tip, with a beam of light directed from within the probe body down a hollow stylus to a reflector at the stylus tip.
Unlike conventional styli that need to be very stiff, the new hollow stylus is designed to bend, thereby deflecting the return path of the laser beam which is monitored by a Position Sensing Detector (PSD), also mounted in the probe body.
Movement of the laser spot on the PSD is translated into a measurement output by combining it with information about the geometry of the measuring head and probe, and each of the CMM axis scale outputs.
The exact stylus tip position can therefore be calculated.
This process takes place whilst the stylus tip is dynamically scanning the part and the measuring head moves synchronously with the CMM.
With no inertial effects on the laser beam, measurement accuracy is maintained at high speeds.
The advantages provided by a five-axis system using Revo™ and Renscan5™ technology are primarily the minimisation of the dynamic errors caused by the mass of the moving CMM structure. 
When a five axis measuring system is used, most of the unwanted CMM dynamic error is removed because the measuring head performs most of the work.
As the head is much lighter and more dynamic than the CMM, with a significantly better frequency response, it is able to quickly follow changes in the part geometry without introducing harmful dynamic errors.
This allows the CMM to do what it is best designed to do - move at constant velocity in a single vector while measuring.