From the view of optic imaging,it analyzes position accuracy demand of detector and the effect that image plane revolution mechanic brings to optic imaging.

The exact application of compensation theory about cumulative error of machining complex is very effective to improve machining position accuracy.

Through data inspection the spatial position accuracy of foundational geographical information data is discussed, and in same region the quality and position accuracy of the foundational geographical information data that were produced by two departments are analysed in this paper.

To implement high speed machining,the acceleration and deceleration control method of CNC machine tools must have better flexibility,stability and location accuracy.

The problem of a 3 dimensional location accuracy of a manipulator controlled by stepmotors was discussed by using an example of manipulator writing in this paper.

Piezoelectric driven micromanipulator and its positioning accuracy analysis;

Research work has shown that the distance error model is useful to the study of thepositioning accuracy of robots.

Aimming at high positioning accuracy demands of revolute joint,the closed-loop feedback using circular grating was adopted.

With the increase of work speed,position precision of paper feeding trends to increase too.

A research is done and analysis is made on the elements which interfere with the accuracy of the screen process printing-focusing on the elements which affect the position precision.

In order to meet the requirement of design for dimension and position precision,and to draw parts with small drawing coefficient on general stamping machine,a die with floating drawing punch and floating piercing matrix,and with easy-adjustable blank-holding force was introduced.