| 摘要 |
PURPOSE:To make surface pressure constant as well as to secure highly accurate surface roughness and flatness, by detecting a deflection value in a rotary table with a noncontact displacement meter, utilizing an overcurrent loss, installed on a lower surface of the rotary table and thereby controlling a feed speed. CONSTITUTION:Securing the output proportioned to a deflection value in a rotary table 1 from a noncontact displacement meter 8 and its controller 12 installed on a lower surface of the table 1, analog output is converted into a digital one by an analog-to-digital converter 12 and inputted into a microcomputer 13. When a value after the elapse of (t)sec after a grinding start is equal to the desired value, operation continues as it is, but when unequal is the case, a pulse is generated with a pulse generator 14 by a command of the computer 13, changing a feed speed of the table 1 by stages, and it is controlled so as to become the desired value. A pulse generating velocity is converted into voltage by the D/A converter and changes the number of revolutions of a DC motor via a driver 16. |
