| 摘要 |
PURPOSE:To correct automatically the bottom dead point position of a slide without losing the function of a press machine by controlling the oil temp. of a lubricatng oil in accordance with the signal from a sensor which detects the bottom dead point position of the slide. CONSTITUTION:When a bottom dead point position rises to a reference value or above, a CPU20 feeds a prescribed signal to a selecting circuit 21 to operate a relay. If the relay is assumed to be, for example, PL3 and PL7, the normally open contacts PL3a and PLPa of the relays turn on and a resistor VR3a for temp. setting is selected and at the same time, a control circuit for a heating part is operated. The resistance value by the resistor VR3a and a main variable resistor R1a is therefore set at the terminals A, B of a temp. controller circuit 23, by which the temp. of the heating control circuit in the same temp. controller 23 is set. The bottom dead point is thus lowered down to the reference value. |
