SPEED CONTROL METHOD FOR STEPPING MOTOR, WEAVING CONTROL METHOD FOR WELDER, AND METAL TO BE WELDED

摘要

PROBLEM TO BE SOLVED: To provide a speed control method for a stepping motor which realizes large acceleration and deceleration without a step out. SOLUTION: Values a1-a4 in buffers are output pulse numbers in a long period computed last time and are integers, and values b1-b4 in buffers are output pulse numbers in a long period computed this time and are integers. Namely, the pulse numbers stored in a1-a4 are to be outputted in this order at every two ms, by initial computation. Sorting buffers c1-c4 are those for changing the arrangement of the output values b1-b4 put in the output pulse buffers. Output registers have the function of a shift register, and pulses which correspond in number to the value put in the left-end register in the figure are outputted at every two ms, and the value of each register is shifted to the left side each time.