对于偏差较大的工件零件建议增大触测距离和逼近回退近距离,测量空间较小的零件减小逼近回退距离,这需要根据实际情况设置。
探测距离(接近距离): 测头在采点前以探测速度向前移动的距离。
回退速度: 机器自动采完点后离开工件时的速度。 无自学习指令。
在平时的几何元素测零中,不管是手动测量还是自动测量都需要设定正确的测头参数,防止在测量中发生异常碰撞,关于如何设置正确的探测回退距离,常用的方法有两种:
方法一:在环境设置下——运动控制设置,点击“运动参数”,打开对话框。自动测量修改探测距离,同时会修改回退距离;手动测量修改手动回退距离。
方法二:在自动特征元素测量对话框中,路径参数标签页下勾选“自动回退距离”,软件根据孔的直径和测头参数自动计算回退距离。
探测回退距离的数值设置多少是合适的,测量中不会发生碰撞呢?下面有个公式可以作为参考:
探测回退距离=(孔的直径/槽宽度-测针直径)/2
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72$$ NET_DMIS_20160720 $$ MADE IN DE 2023-2-24 10:47:9 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,2.0000 SNSET/SEARCH,5.0000 SNSET/APPRCH,2.0000 DMESW/COMAND,'SNSET/MANRETRCT,1.0000' 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) GEOALG/PLANE,LSTSQR F(平面1)=FEAT/PLANE,CART,21.2175,21.5866,0,0,0,1.00000000 MEAS/PLANE,F(平面1),3 PTMEAS/CART,2.5273,55.5691,0,0,0,1.00000000 PTMEAS/CART,2.4066,4.6952,0,0,0,1.00000000 PTMEAS/CART,58.7187,4.4953,0,0,0,1.00000000 ENDMES SNSET/DEPTH,0 DMESW/COMAND,'CONST/SET_PROJ_VEC,FA(平面1),1' F(直线1)=FEAT/LINE,UNBND,CART,4.9236,0,-1.8936,0.99987169,0,0.01601860,0,-1.00000000,0 MEAS/LINE,F(直线1),2 PTMEAS/CART,4.9236,0,-1.4474,0,-1.00000000,0 PTMEAS/CART,60.6330,0,-1.4474,0,-1.00000000,0 ENDMES F(点1)=FEAT/POINT,CART,0,4.4552,-1.5666,-1.00000000,0,0 MEAS/POINT,COMP,DME,F(点1),1 PTMEAS/CART,0,4.4552,-1.5666,-1.00000000,0,0 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_R)=ROTATE/ZAXIS,FA(直线1),XDIR D(坐标系1_T)=TRANS/ZORIG,FA(平面1) D(坐标系1_T)=TRANS/YORIG,FA(直线1) D(坐标系1_T)=TRANS/XORIG,FA(点1) DMESW/COMAND,'COORDSYS/CAD=PART' SAVE/DA(坐标系1) MODE/AUTO,PROG,MAN SNSET/RETRCT,1.0000 SNSET/APPRCH,1.0000 DMESW/COMAND,'SNSET/MANRETRCT,1.0000' DMESW/COMAND,'CLEARP/ZDIR,10.0000,ZDIR,10.0000,ON' F(圆1)=FEAT/CIRCLE,INNER,CART,31.5000,31.5000,0,0,0,1.00000000,20.0000 CALL/EXTERN,DMIS,M(NETDMIS_AUTO_CIRCLE_1007),AUTOFIGURE,F(圆1),CIRCLE,INNER,CART,LSTSQR,31.5000,31.5000,$ 0,0,0,1.00000000,20.0000,-1.00000000,0,0,5,-3.0000,0,0,0,0,360.0000,TOUCH,CIRCLE,0.3000,0,FALSE,FALSE,$ FALSE,10.0000,"CUR",TRUE,FALSE,0,FA(VECBLD),10.0000,2.5000,3,XYPLAN,"",'7,0,0,0,0,3.0000,0,10','0,1,0,$ 5.0000',"EXT3",ENDCAL F(圆2)=FEAT/CIRCLE,INNER,CART,52.4500,11.5500,0,0,0,1.00000000,6.7960 CALL/EXTERN,DMIS,M(NETDMIS_AUTO_CIRCLE_1007),AUTOFIGURE,F(圆2),CIRCLE,INNER,CART,LSTSQR,52.4500,11.5500,$ 0,0,0,1.00000000,6.7960,-1.00000000,0,0,5,-3.0000,0,0,0,0,360.0000,TOUCH,SCREW,0.3000,1.5000,FALSE,FALSE,$ FALSE,10.0000,"CUR",TRUE,FALSE,0,FA(VECBLD),10.0000,2.5000,3,XYPLAN,"",'7,0,0,0,0,3.0000,0,10','0,1,0,$ 5.0000',"EXT3",ENDCAL F(圆3)=FEAT/CIRCLE,INNER,CART,31.5000,13.5000,0,0,0,1.00000000,10.0000 CALL/EXTERN,DMIS,M(NETDMIS_AUTO_CIRCLE_1007),AUTOFIGURE,F(圆3),CIRCLE,INNER,CART,LSTSQR,31.5000,13.5000,$ 0,0,0,1.00000000,10.0000,-1.00000000,0,0,5,-3.0000,0,0,0,0,360.0000,TOUCH,SCREW,0.3000,1.5000,TRUE,FALSE,$ FALSE,10.0000,"CUR",TRUE,FALSE,0,FA(VECBLD),10.0000,2.5000,3,XYPLAN,"",'7,0,0,0,0,3.0000,0,10','0,1,0,$ 5.0000',"EXT3",ENDCAL
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