通过拾取模型上的曲面, 通过边缘偏置曲线获得曲线理论值, 从而进行测量的一种方式。
周边扫描功能是间接对工件边界进行扫描,如图所示橙色线是根据数模计算得到的边界,红色线是通过偏值得到的实际扫描线
$$ NET_DMIS_20160720
$$ MADE IN DE 2023-2-9 12:59:58
INCLUD/DMIS,'NET_DMIS_DEFINES.DMI'
INCLUD/DMIS,'VARDEFINE'
DMESW/COMAND,'PROBE_VAL/INIT'
UNITS/MM,ANGDEC
D(MACHINE)=DATSET/MCS
DMESW/COMAND,'COORDSYS/ALIGN'
WKPLAN/XYPLAN
PRCOMP/ON
PRCOMP/ON
FEDRAT/POSVEL,MMPS,300.0000
ACLRAT/POSACL,MMPSS,100.0000
FEDRAT/MESVEL,MMPS,20.0000
ACLRAT/MESACL,MMPSS,100.0000
SNSET/RETRCT,1.0000
SNSET/SEARCH,5.0000
SNSET/APPRCH,1.0000
DMESW/COMAND,'SNSET/MANRETRCT,2'
DMESW/COMAND,'REPORT/CLEAR'
MODE/MAN
DID(D2L40)=DEVICE/STOR,'D2L40'
OPEN/DID(D2L40),SNS
S(A0B0)=SNSDEF/PROBE,INDEX,POL,0.0,0.0,0.0000,0.0000,1.0000,189.6500,2.0000
SNSLCT/SA(A0B0)
DMESW/COMAND,'SNSET/MANRETRCT,2.0000'
GEOALG/PLANE,LSTSQR
F(平面1)=FEAT/PLANE,CART,30.5513,34.4137,0,0,0,1.00000000
MEAS/PLANE,F(平面1),4
PTMEAS/CART,2.6578,60.3395,0,0,0,1.00000000
PTMEAS/CART,3.3084,3.0493,0,0,0,1.00000000
PTMEAS/CART,58.6799,5.1020,0,0,0,1.00000000
PTMEAS/CART,57.5592,69.1641,0,0,0,1.00000000
ENDMES
DATDEF/F(平面1),DAT(A_平面1)
D(坐标系1_S)=DATSET/DAT(A_平面1),ZDIR
D(坐标系1_T)=TRANS/ZORIG,FA(平面1)
SAVE/DA(坐标系1)
SNSET/DEPTH,0
DMESW/COMAND,'CONST/SET_PROJ_VEC,FA(XY),1'
F(直线1)=FEAT/LINE,UNBND,CART,4.7975,0,-2.4880,0.99999257,0,0.00385397,0,-1.00000000,0
MEAS/LINE,F(直线1),2
PTMEAS/CART,4.7975,0,-2.3777,0,-1.00000000,0
PTMEAS/CART,62.0204,0,-2.3777,0,-1.00000000,0
ENDMES
D(坐标系2_R)=ROTATE/ZAXIS,FA(直线1),XDIR
D(坐标系2_T)=TRANS/YORIG,FA(直线1)
SAVE/DA(坐标系2)
F(点1)=FEAT/POINT,CART,0,4.4387,-1.5428,-1.00000000,0,0
MEAS/POINT,COMP,DME,F(点1),1
PTMEAS/CART,0,4.4387,-1.5428,-1.00000000,0,0
ENDMES
D(坐标系3_T)=TRANS/XORIG,FA(点1)
DMESW/COMAND,'COORDSYS/CAD=PART'
SAVE/DA(坐标系3)
MODE/AUTO,PROG,MAN
DMESW/COMAND,'CLEARP/ZDIR,10.0000,ZDIR,10.0000,ON'
XTERN
EXTFIL/DMIS,'CURVESURFACE\曲线1.DMI'
ENDXTN
CALL/EXTERN,DMIS,M(CURVE79323062)