Contact detection apparatus for wire electrical discharge machine with capability to vary applied gap voltage
AssigneeFanuc Corporation
InventorsTomoaki Matsunaga, Yushi Takayama, Akiyoshi Kawahara
Life of this patent
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Abstract
A contact detection apparatus for a wire electrical discharge machine includes a voltage application unit adapted to apply a detection voltage to detect contact between a wire electrode and a workpiece; a contact determination unit adapted to determine contact or non-contact between the wire electrode and the workpiece based on changes in the detection voltage applied by the voltage application unit; and a voltage value changing unit adapted to change a voltage value of the detection voltage applied by the voltage application unit.
Claims11
A contact detection apparatus for a wire electrical discharge machine, said apparatus comprising:
- a voltage application unit configured to apply a detection voltage to detect contact between a wire electrode and a workpiece during non-machining periods;
- a contact determination unit configured to determine contact or non-contact between the wire electrode and the workpiece based on changes in the detection voltage applied by the voltage application unit;
- and
- a controller configured to change, during the non-machining periods, a voltage value of the detection voltage applied by the voltage application unit according to a property of the workpiece.
A contact detection apparatus for a wire electrical discharge machine, said apparatus comprising:
- a voltage application unit configured to apply a detection voltage to detect contact between a wire electrode and a workpiece during non-machining periods;
- a contact determination unit configured to determine contact or non-contact between the wire electrode and the workpiece based on changes in the detection voltage applied by the voltage application unit;
- and
- a controller configured
- to change, during the non-machining periods, a voltage value of the detection voltage applied by the voltage application unit;
- to store a data table containing voltage values of the detection voltage in association with materials of the workpiece;
- and
- to determine the voltage value of the detection voltage based on the data table as well as on the material of the workpiece set as a machining condition.
A contact detection apparatus for a wire electrical discharge machine, said apparatus comprising:
- a voltage application unit configured to apply a detection voltage to detect contact between a wire electrode and a workpiece during non-machining periods;
- a contact determination unit configured to determine contact or non-contact between the wire electrode and the workpiece based on changes in the detection voltage applied by the voltage application unit;
- a controller configured
- to change, during the non-machining periods, a voltage value of the detection voltage applied by the voltage application unit;
- to store a data table containing voltage values of the detection voltage in association with materials and sizes of the wire electrode;
- and
- to determine the voltage value of the detection voltage based on the data table as well as on the material and size of the wire electrode set as machining conditions.
Dependencies are inferred from the claim text.