| 摘要 |
PURPOSE:To eliminate any transfer error by a method wherein extrusion state is detected by an extrusion state detecting means such as current detector etc. detecting driving current value of servomotor. CONSTITUTION:During the extruding process, a CPU 12 reads out the signals from a current detector 8 detecting driving current I from a servomotor M1 converted into digital signals by A/D converter 10 through the intermediary of an input/output circuit 14. When the read out values of driving current 1 attain to the current value T1 corresponding to extrusion pressure at the transfer point specified in a program, the CPU 12 instructs a servodriving circuit 9 to drive the servomotor M1 at the driving current suitable for pressurization through the intermediary of input/output circuit 14 for changing from extrusion spedd control to pressurization control. |
