Feedback-type position control method

Abstract

A feedback-type position control method by which position control can be effected properly and easily in various machines. A pulse number converter (5) obtains the sum of a remainder (Rn-1) for a preceding cycle and the product of the number (xn) of feedback pulses delivered from a pulse coder (4) within a predetermined period and a first conversion coefficient (A) (S1 to S3). If the sum is positive or zero, position feedback pulses corresponding in number to a quotient (yn') obtained by dividing the absolute value of the sum by a second conversion coefficient (B) are delivered, and a remainder (Rn') resulting from the division is stored as a remainder (Rn) used to obtain the sum for the next cycle (S4 to S8). If the sum is negative, the number of position feedback pulses is set at a value (-yn'-1) obtained by subtracting 1 from a value obtained by inverting the sign of the quotient, and a value (B-Rn') obtained by subtracting the remainder from the second conversion coefficient is used as the remainder (S9 and S 10). The significance of one position feedback pulse is brought to be equivalent to a movement of a machine movable section for one position command pulse, so that the position control of various machines can be effected by a pulse coder of one type.

Dependencies are inferred from the claim text.