Feed-deviation preventive path-controlled machining method and a

Details Feed-deviation preventive path-controlled machining method and a Feed-deviation preventive path-controlled machining method and a

1984-08-31

1986-08-12

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318577, G05B 2302

Patent

active

046058869

ABSTRACT:
A feedpath deviation preventive NC path-controlled machining system in which a plotting unit is used, in a preliminary operation in advance of a machining operation, to produce on a record medium a continuous plot equivalent to a programmed machining feed path to be followed by relative displacement between the tool member and the workpiece during the machining operation. In the latter, a sensing head is disposed in sensing relationship with the plotted record medium for relative displacement to the latter jointly with the relative displacement between the tool member and the workpiece. The sensing head continues to trace the continuous plot as long as the actual machining relative displacement proceeds along the programmed machining path to produce an OK signal. An output circuit unit is provided to respond to any disappearance of the OK signal representing a deviation of the actual displacement from the programmed path for providing a warning signal and/or a control signal which acts to deactuate the machining-feed drive system.

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