For measuring ranges greater than around 400 mm, the bridgetype machine design is economical. What all bridgetype machines have in common is that the ram with the sensors can be moved vertically and horizontally on a gatelike base structure. The third required direction of movement is realised by moving the entire bridge or a measuring table. Machines with a fixed (Fig. 38c) or moving (Fig. 38d) bridge differ in various properties, e.g. in terms of accuracy and space requirements.
 Development

Machines
 Coordinate measuring machines with XY table
 Coordinate measuring machines with guideways in a single plane
 Coordinate measuring machines with bridge
 Coordinate measuring machines with rotary axes
 Coordinate measuring machines for twodimensional measurements
 Coordinate measuring machines with Xray tomography
 Coordinate measuring machines for special applications
 Sensors
 Software
 Special characteristics
 Accuracy
 Publications
 Literature page