| 摘要 |
1,129,411. Template followers. FUJITSU Ltd. March 15, 1966 [March 15, 1965], No.11382/66. Heading G3N. [Also in Division B3] A profiling control device comprises a tracing head, detecting displacement of a stylus in at least two mutually perpendicular axes and the displacement in any direction converted to a detected displacement in one direction, and an index and function generator responsive to the detected displacements which controls variable frequency pulse generators determining the speed of pulse motors for the feed axis in use of the device. As shown a tracer head comprises a stylus 2, for engaging a template, not shown, which is angularly movable about a spherical seat 5 and axially displaceable in a frame 1. A conical seat 4 is formed at the top end of the stylus engaging a conical seat 8 through a ball 7. The assembly 2, 5, 4, 7, 8 is loaded by a spring 9. Movement of the stylus in a X or Y direction is sensed by differential transformers, such as a transformer 13. Movement in the Z direction, together with components of the X and Y movements, are sensed by a differential transformer 10. In a modification the Z -axis movement only is separately sensed by a differential amplifier. The outputs of the differential transformers are amplified and applied to an angular index servo and function generator mechanism, comprising coupled resolvers. The outputs of the function generator are rectified to control the pulse frequencies of oscillators which, through a gating network, determine the rotation of X, Y and Z axes pulse motors positioning an arm carrying the tracer head and a cutter engaging two-dimensional workpiece. In the modification, the differential transformer separately sensing Z -axis movement controls the Z -axis pulse motor to enable processing of a workpiece in three-dimensions. The pulse motors are electro-hydraulic and comprise a step motor coupled to a feedback type hydraulic motor the angular rotation of which is proportional to the number of pulses applied to the step motor. |
