| 摘要 |
PURPOSE:To reduce the frequency of slow ups and downs by making the stepping motor work according to the pulse of pulse train frequency so that the speed thereof corresponds the output value of comparator circuit memorized at a constant timing. CONSTITUTION:A comparator circuit 4 compares a command signal outputted from a digital follow-up command circuit 1 and a position signal of the intended control device 2 outputted from a degital position detector 3 every constant cycle to feed the deviation to a ratch circuit. A pulse generation circuit 10 provides a pulse train frequency corresponding to a stored value of the ratch circuit to a stepping motor 8. With such an arrangement, the frequency of slow ups and downs can be decreases thereby reducing the stress of the stepping motor 8 and the intended control device 2 while increasing response speed. |
