摘要:
This disclosure relates to a tracer-controlled machine tool adapted for numerical control. The contact gaps actuated by a tracer stylus to control the movement of a cutting tool is electrically simulated and the simulated tracer contact gap is varied with slide velocity. The gap is simulated by a comparison of a velocity signal with a signal proportional to servo position error or lag and the result of this comparison indicates an open or closed contact and actuates a slide drive means in response thereto. This comparison is further utilized to modify the slide velocity to maintain the servo position lag substantially proportional to slide velocity within predetermined limits.
摘要:
A NUMERICAL CONTROL SERVO SYSTEM IN WHICH THE POSITION ERROR OR LAG IS CONVERTED TO A PULSE FREQUENCY PROPORTIONAL TO THE LAG AND WHERE PROVISION IS MADE FOR VARYING THE CONVERSION FACTOR AS A FUNCTION OF THE LAG OF A PLURALITY OF AXES OF MOVEMENT.