Numerical-control machine tool
AssigneeKitamura Machinery Co., Ltd.
InventorShigeru Yamada
Life of this patent
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Abstract
A numerical-control machine tool has a plurality of positioning members (12, 13, 15) which are each driven along a positioning axis (x, y, z) by a feed screw (19, 20, 21). The arrangement is provided with a backlash compensation control arrangement (203, 204, 205) for compensating backlash errors of the positioning members (12, 13, 15) along the respective axes (x, y, z). This arrangement includes a memory (214) for storing backlash compensation values for each of a plurality of different driving modes, including a plurality of feed length modes defined on the basis of feed length, editing, memory operation, tape operation, MDI operation, different kinds of handle feed, jog feed, rapid feed, zero-return and the like type of variable.
Claims9
A numerical-control machine tool for compensating backlash errors of a positioning member (12, 13, 15) driven along at least one positioning axis (x, y, z) by a feed screw (19, 20, 21), comprising:
- at least one backlash compensation means (203, 204, 205) for compensating backlash errors of said positioning member (12, 13, 15) along said axis (x, y, z), the backlash compensation means (203, 204, 205) having a memory means (214) for storing a plurality of backlash compensation values in accordance with a plurality of driving modes, the driving modes including a plurality of feed length modes being defined on the basis of feed length,
- wherein the plurality of driving modes are selected from the group consisting of an editing, a memory operation, a tape operation, an MDI operation, three kinds of handle feed, a jog feed, a rapid feed, and a zero-return.
Dependencies are inferred from the claim text.