As the planar array points positioning requests to be precise in the escape wheel vision measurement system

a low-speed

low cost

two-dimensional motion control platform with high positioning precision is realized

which is served by PLC and AC servomotor.The precision of the service platform can reach the level of micron.Meanwhile

considering the features in vision measurement

a method adopting reference characteristic point is used

which makes the platform’s zero-line calibrating automatically

instead of using the traditional zero-line calibrating method.At present

the instrument has been operated in the industrial field.