| 摘要 |
<p>The movement of the cutting head (18) is monitored by a linear potentiometer (LP) whereby the "stroke termination" position (die height) can be determined as one output value of the potentiometer and the "stroke termination signal" position can be determined from it by subtracting a difference value (ET) (representative of the characteristics of the press and in particular of its hydraulic circuitry) which is determined in a calibrating operation of the press. Once the difference value (ET) has been established, the "stroke termination signal" position is calculated each time the machine is set for a given die height. The depth of penetration of the die into the cutting pad can be separately adjusted by the operator, if desired, using a display (D1) and increment/decrement button switches (B11, B12). A similar system (D2, B21, B22) is provided for setting the "daylight", together with a system for calibrating the press for the return stroke independently of the cutting stroke. The press includes microprocessor control means.</p> |
