如圖加工一個(gè)圓周,指令應(yīng)為()。
A. G90 G02 X0 Y40.0 R-40.0 B. G90 G02 X0 Y40.0 J-40.0 C. G91 G02 X0 Y40.0 R-40.0 D. G91 G02 J-40.0 E. G91 G02 X0 Y40.0 J-40.0
銑削如圖所示圓弧指令應(yīng)為()。
A. G90 G02 X30-0 Y0 R30.0 B. G90 G02 X30.0 Y0 R-30.0 C. G90 G02 X-30.0 Y0 R30.0 D. G90 G02 X30.0 Y0 R30.0 E. G90 G02 X-30.0 Y0 R-30.0
銑削如圖所示圓弧,指令應(yīng)為()。
A. G90 G03 X20.0 Y40.0 I-30.0 J-10.0 F200 B. G90 G03 X20.0 Y40.0 I-10.0 J-30.0 F200 C. G91 G03 X-20.0 Y20.0 I-30.0 J-10.0 F200 D. G91 G03 X-20.0 Y20.0 I-10.0 J-30.0 F200 E. G90 G03 X20.0 Y40.0 I-30.0 J-30.0 F200