| 摘要 |
PURPOSE:To prevent the run-out of a pulse motor due to the abrupt stoppage, by providing another indicating circuit as well as the conventional slow-down indicating circuit in a cut feeding controller for grinder employing a pulse motor while performing the slow-down as required in the way of the slow-up. CONSTITUTION:Another indicating circuit comprising a comparator 6 is provided as well as the conventional slow-down indicating circuit comprising a comparator 8 in a slow-down controller 9. In such a structure, when the voltage generating circuit 12 will produce the slow-up voltage and the driving pulse number will reach to half of the number corresponding to the target position to match the outputs from the counters 4, 5 thus to produce the slow-down indicating signal (b) from the comparator 6, said output (b) will produce the slow-down starting signal (d) through the gates 9b, 9d even when the output from the circuit 12 has not reached to the setting. Consequently the circuit 12 will produce the slow-down voltage immediately to the pulse motor PM. |
