Data Handling and Control System Generalities
The better definition of a Numerical Control for an automatic Co-ordinate Measuring
Machine is “Data Handling and Control System”. This definition is rather accurate because derives from the fact that the system in question allows to manage besides, the dynamic activities of the CMM, also the computing the programming and interfacing tasks. This fundamental component of the CMM generally consists of a distributed intelligence architecture, where each processor handles specific tasks and interface the lower and/or upper levels until machine axes actuators are reached.
The data handling and control system may vary in terms of structural complexity and,
consequently, of cost on the basis of a number of parameters, such as:
- Power (deriving from the entity of the physical masses of the moving elements of
the CMM and of the dynamic performance to be achieved)
- Computing power necessary for the use of application programs
- Type of control (it may be “Point to Point” Or Continuous”)
- Number of CMM axes to be controlled
- Class of protection of the system cabinet (on the basis of the characteristics of the
ambient where the system itself will be installed)
- Special components (some large corporations internal standards require the use of
some specific type of components for the construction of the system)
- Management of the accessory devices
