Tracer mechanism having servo positioning type control means ass

Details Tracer mechanism having servo positioning type control means ass Tracer mechanism having servo positioning type control means ass

1974-03-26

1976-08-24

Scott, James R.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318 39, G05B 1936, B23Q 528

Patent

active

039769283

ABSTRACT:
A tracer mechanism having a stylus to scan the surface of a pattern or a template and to cause a congruent relative movement of a cutter and a workpiece, whereby to reproduce the contour of the pattern or template in the workpiece. The stylus is provided with an axial force element which can adjustably vary the endwise thrust of the stylus, thereby to vary the reaction force of the stylus against the workpiece. As a consequence, the stylus can be caused more accurately to track the pattern or template along a tracing plane, especially on a pattern which has a steep slope that tilts laterally relative to the tracing plane. Means is also disclosed to utilize the axial force element in a machine tool table control wherein a "box-cycle" movement is made in which the cutting tool is withdrawn from the workpiece, is stepped to a new tracing plane, and is returned in a non-cutting motion to the starting point of a subsequent cutting movement parallel to the first one.

REFERENCES:
patent: 2116593 (1938-05-01), Bouvier et al.
patent: 2313989 (1943-03-01), Caldwell et al.
patent: 2373332 (1945-04-01), O'Neill
patent: 2413274 (1946-12-01), Wilkie et al.
patent: 2511956 (1950-06-01), Wetzel
patent: 2820162 (1958-01-01), Snell
patent: 2866153 (1958-12-01), Rhoades
patent: 3292495 (1966-12-01), Hill et al.
patent: 3457484 (1969-07-01), Shimizu et al.
patent: 3467899 (1969-09-01), Inaba et al.
patent: 3582749 (1971-06-01), Wenzel

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