公开(公告)号：US5159251A

公开(公告)日：1992-10-27

申请号：US768591

申请日：1991-09-30

申请人： Takao Sasaki ,  Kentaro Fujibayashi ,  Morimasa Sato

发明人： Takao Sasaki ,  Kentaro Fujibayashi ,  Morimasa Sato

IPC分类号： G05B19/18 ,  G05B19/404

CPC分类号： G05B19/404 ,  G05B2219/33128 ,  G05B2219/41036 ,  G05B2219/41206 ,  G05B2219/50291 ,  G05B2219/50374

摘要： A position correcting system is incorporated in a machine tool having a plurality of workpiece machining positions. A control block (80) has a position correcting register (81) for storing position correctives corresponding to the respective workpiece machining positions. Distributed data (X1, Z1) are calculated from a machining program (71) by a pre-processing means (72). The position correctives (.DELTA.X1, .DELTA.Z1) are added to the distributed data (X1, Z1) by an adder (82), which outputs position commands for machining heads corresponding to the workpiece machining positions. In response to the position commands, an interpolating unit (83) carries out pulse interpolation and produce output pulses. Such control blocks (80, 90, 100) are associated with the respective machining heads. Errors between the workpieces and the machining heads are corrected in all the machining positions, so that the workpieces can be machined with accuracy.