| 摘要 |
PURPOSE:To eliminate the locus errors in a contour cutting process by using a differentiator which differentiates a position command in terms of time. CONSTITUTION:A position command Pin is differentiated by a differentiator A12 in terms of time for production of a signal. This differentiated signal is supplied to a speed loop amplifier 15 together with a signal which is obtained by applying the time differentiation through a time differentiator C14 to the signal obtained by applying the time differentiation to the command Pin through a differentiator B13 and at the same time multiplying said differentiated signal by Jm/Kv (Jm: constant of inertia mode, Kv: sped loop gain), a speed signal which obtained by multiplying the deviation signal received from a position deviation calculator 10 using the command Pin and a signal (a) received form a position detector 19 as inputs by the position loop gain Kp through a speed loop amplifier 11, and a signal supplied from a speed detector 18. These signals supplied to the amplifier 15 are added together. Thus the transmission function is kept at '1' between an input Pin and an output Pout. As a result, a contour cutting process is attained at a high speed and with high accuracy.
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