| 摘要 |
The position control circuit of the injection mold consists of a latch(10a)(10b) temporally memorizing data set as the present position value from central processing unit, up/down counters(20a-20d) accumulately counting the true position value of injection and a shape from the memorized latch data, OR gate(OR) controlled by program of central processing unit to free-set the present position value of counters(20a-20d), inverters(IN)(IN) inverting the position detect signals(A)(B) of increasement encoder having the 90 degree phase difference, flip flops(30a)(30b) receiving the data of inverters(IN)(IN) to create the delayed pulse differential synchronized with the input clock, AND gates(AND)(AND) receiving the output of the flip flops(30a)(30b) to output the delayed pulse, multiplex(25) optionally switching the output of AND gates(AND)(AND) according to the output of encoder through the inverters(IN)(IN), OR gates(OR)(OR) receiving the output of multiplex(25) and the output of AND gates(AND)(AND) to generate the up/down signal of counter.
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