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1、(50,80)XY实际机构的从动件导路要求是水平的，且凸轮轴心坐标是（50，80） 。XY(0,0)根据书本公式画出的凸轮轴心坐标是（0，0） ，且导路是垂直的。(0,0)XY(50,80)将按照书本公式画出的凸轮顺时针回转 90 度，然后平移（50，80） ，就得到实际凸轮机构 的起始位置。(0,0)XY120凸轮从起始位置逆时针转过120eS0(50,80)S(120)将按照书本公式画出的凸轮先顺时针回转 90 度，再逆时针转动 120 度，然后平移 （50，80） ，就得到实际凸轮机构的凸轮从其起始位置逆时针转动 120 度的位置。! EXAMPLE 5-2 IN P.91 ! TWO
2、CAM CURVES ROTATE! ! THE CENTRE OF THE CAM IS AT (50, 80) ! THE GUIDEWAY OF THE FOLLOWER IS HORIZONTALDIM XB(0 TO 360), YB(0 TO 360) ! ARRAY OF PITCH CURVE DIM XT(0 TO 360), YT(0 TO 360) ! ARRAY OF CAM CONTOUR DIM S(0 TO 360) ! ARRAY OF FOLLOWER DISPLACEMENTOPTION NOLET SET WINDOW -200, 360, -150, 2
3、80M=+1 N=+1 RP=100 E=40 RR=20 RC=30 H=80 DELTA0=140*PI/180 DELTAS=40*PI/180 DELTA01=100*PI/180 S0=SQR(RP2-E2)! CALCULATE AND STORE DISPLACEMENTS AND CO-ORDINATES OF TWO CURVESFOR I=0 TO 360 STEP 1 ！ use J, not I !DELTA=I*PI/180IF DELTA=DELTA0 THEND2=DELTA/DELTA0S(I)=H*(10*D23-15*D24+6*D25)S1=H*(30*D
4、22-60*D23+30*D24)/DELTA0ELSEIF DELTA=(DELTA0+DELTAS) THENS(I)=HS1=0ELSEIF DELTA=(DELTA0+DELTAS+DELTA01) THEND4=(DELTA-DELTA0-DELTAS)/DELTA01S(I)=H*(1-D4+1/(2*PI)*SIN(2*PI*D4)S1=-H/DELTA01*(1-COS(2*PI*D4)ELSES(I)=0S1=0END IFXB(I)=M*(S0+S(I)*SIN(DELTA)+N*E*COS(DELTA)YB(I)=(S0+S(I)*COS(DELTA)-N*E*SIN(D
5、ELTA)XB1=M*(S1*SIN(DELTA)+(S0+S(I)*COS(DELTA)-N*E*SIN(DELTA)YB1=S1*COS(DELTA)-(S0+S(I)*SIN(DELTA)-N*E*COS(DELTA)KB=SQR(XB12+YB12)XT(I)=XB(I)+M*RR*YB1/KBYT(I)=YB(I)-M*RR*XB1/KB NEXT I! ANIMATED CAM FOR J=0 TO 360 STEP 2BOX CIRCLE 50-RP, 50+RP, 80-RP, 80+RPPLOT 50-RP, 80; 50+RP, 80PLOT 50, 80-RP; 50,
6、80+RPDRAW PITCHCURVE WITH ROTATE(J*PI/180-PI/2)*SHIFT(50, 80)DRAW CAMCONTOUR WITH ROTATE(J*PI/180-PI/2)*SHIFT(50, 80)BOX CIRCLE 50+S0+S(J)-RR, 50+S0+S(J)+RR, 80-E-RR, 80-E+RRPLOT 50+S0+S(J), 80-E; 50+S0+S(J)+200, 80-EPAUSE 0.1CLEARIF J=360 THEN J=0 NEXT J! SUBROUTINE FOR DRAWING PITCH CURVE WHEN DEL
7、TA=0, XO=0, YO=0 ! THE GUIDEWAY OF THE FOLLOWER IS VERTICAL PICTURE PITCHCURVEFOR I=0 TO 360PLOT XB(I), YB(I);NEXT IPLOT END PICTURE! SUBROUTINE FOR DRAWING CAM CONTOUR WHEN DELTA=0, XO=0, YO=0 ! THE GUIDEWAY OF THE FOLLOWER IS VERTICAL PICTURE CAMCONTOURFOR I=0 TO 360PLOT XT(I), YT(I);NEXT IPLOT END PICTUREEND作业： 将三个不同的凸轮机构放在同一界面内，各凸轮中心不重叠，各从动件的位置与书本中的 位置不同。让三个凸轮机构同时转动起来。
