Data matrix code reading devices use a CCD camera that records an impression of the object that is then evaluated by the integrated signal processor. Certain shape specifications for the code must be heeded in this respect.
The "finder pattern", which forms the lower left-hand corner of the code, acts as an identification element, while the upper right-hand corner, the "alternating pattern", sets up the data field. The data region containing the information to be read is located within these limits.
Pepperl+Fuchs provides suitable device variants to suit individual practical requirements. The reading devices are particularly distinguished by the fact that they have no adverse influence on operating personnel, and alignment of the code to suit the reading device is unnecessary.
They achieve astounding results, thanks to the extremely high speed at which they evaluate the data read. A traversing speed of up to 6 m/s and 25 readings per second are achieved in the case of an ECC200 code (symbol dimensions of 16 x 16 and module size of 0.35 mm). Moreover, an associated software CD is available for each reading device.
