hexagon logo
Register Sign in
  • Replies 11 replies
  • Subscribers 222 subscribers
  • Views 244 views
  • Users 0 members are here
Options
Related

construct circle from points in loop

ewadora
Good Morning All

I have punch with gear inside (35 teeth to make math easier) and I need to measure larger diameter.I made loop which takes points between teeth but i have no idea how to construct circle. CMM takes points, I can see them on CAD model but not on any list - just point 1. I would be grateful for any suggestions.

MOVE/CLEARPLANE
V1 =LOOP/START,ID=YES,NUMBER=35,START=1,SKIP=,
OFFSET:XAXIS=0,YAXIS=0,ZAXIS=0,ANGLE=10.286
PNT1 =FEAT/CONTACT/VECTOR POINT/DEFAULT,POLAR
THEO/<32.754,270,-2>,<0,1,0>
ACTL/<32.752,269.998,-2>,<0,1,0>
TARG/<32.754,270,-2>,<0,1,0>
SNAP=NO
SHOW FEATURE PARAMETERS=NO
SHOW CONTACT PARAMETERS=YES
AVOIDANCE MOVE=BOTH,DISTANCE=5
SHOW HITS=NO
LOOP/END

Thanks,
Ewa D.
  • I don't know how to see your points, but am interested in the answer. If I had that issue, I'd likely copy the first point, then "paste with pattern" to make the rest. That way, I know they would be out where I could see/ find them. Looking forward to reading about other options!
  • Looping 4 times 
    v1         =loop/start,id=yes,number=4,start=1,skip=,
              offset:xaxis=0,yaxis=0,zaxis=0,angle=90
pnt2         =feat/contact/vector point/default,cartesian
              theo/<1.1909,0,-0.1>,<-1,0,0>
              actl/<1.1909,0,-0.1>,<-1,0,0>
              targ/<1.1909,0,-0.1>,<-1,0,0>
              snap=no
              show feature parameters=no
              show contact parameters=yes
                avoidance move=no,distance=0.3937
              show hits=no
            loop/end
cir7       =feat/circle,cartesian,out,least_sqr,no
            theo/<0,0,-0.1>,<0,0,1>,2.3818
            actl/<0,0,-0.1>,<0,0,1>,2.3818
            constr/circle,bf,2d,[COLOR=#FF0000]pnt2[1],pnt2[2],pnt2[3],pnt2[4][/COLOR],,
            outlier_removal/off,3
            filter/off,upr=0

    just keep adding pnt<num>[index] until you reach all 35.
  • in reply to Kp61dude!
    good I don't have to post LOL. You got it Slight smile
  • Unfortunately it does not work. PC-DMIS wouldn't construct BF circle from 1 point, it constracted cast circle, I have made changes manually and added points as advised but when I run program at the end of execution i get construction error. And it measures 1mm, i tired to enter 65 (mine dia), no difference





    ​
    Attached Files
  • Construct it from that one point as cast then in the Edit window change cast to bf (best fit), you will see an error message...ignore it. Change pnt<num> to pnt<num>[index], you will get another and another error message until you have 3 pnt<num>[index] in there (constructing a circle is 3 points minimum). You will stop seeing the errors after the 3rd point, continue typing in your pnt<num>[index]

    In other words don't use the construct command window to handle this one, Edit window editing only. Well besides creating the initial constructed circle to work with, it can be constructed from anything (legal) just to populate the PcD code in the Edit Window and avoid any error pop-up.
  • in reply to Kp61dude! 
    cir7       =feat/circle,cartesian,out,least_sqr,no
            theo/<0,0,-0.1>,<0,0,1>,2.3818
            actl/<0,0,-0.1>,<0,0,1>,2.3818
            constr/circle,bf,2d,pnt2[1..4],,
            outlier_removal/off,3
            filter/off,upr=0



    Just to tack on, you can do this instead of each point individually
  • in reply to Kp61dude!
    I was tempted to try this ^^^^ after I posted but failed to go back and give it a try as I was not sure if it would have worked or not. Thanks for posting @Krisj!!! How about you make it a real post, instead of a comment, so others will run right into it, it's a huge time saver. Way better than typing up pnt1[1] thru pnt1[35]!!!!
  • For some reason it doesn't accept single points like pnt1[1],pnt1[10],pnt1[20],, but works with pnt1[1..35],,

    thanks


    V1 =LOOP/START,ID=YES,NUMBER=35,START=1,SKIP=,
    OFFSET:XAXIS=0,YAXIS=0,ZAXIS=0,ANGLE=10.286
    PNT1 =FEAT/CONTACT/VECTOR POINT/DEFAULT,POLAR
    THEO/<32.754,270,-3>,<0,1,0>
    ACTL/<32.752,270,-2.999>,<0,1,0>
    TARG/<32.754,270,-3>,<0,1,0>
    SNAP=NO
    SHOW FEATURE PARAMETERS=NO
    SHOW CONTACT PARAMETERS=YES
    AVOIDANCE MOVE=BOTH,DISTANCE=5
    SHOW HITS=NO
    LOOP/END
    CIR4 =FEAT/CIRCLE,CARTESIAN,IN,LEAST_SQR,NO
    THEO/<0,0,-3>,<0,0,1>,65.508
    ACTL/<-0.002,0.003,-3>,<0,0,1>,65.511
    CONSTR/CIRCLE,BF,2D, PNT1[1..35],,
    OUTLIER_REMOVAL/OFF,3
    FILTER/OFF,UPR=0
    DIM LOC1= LOCATION OF CIRCLE CIR4 UNITS=MM ,$
    GRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH HALF ANGLE=NO
    AX NOMINAL +TOL -TOL MEAS DEV OUTTOL
    D 65.508 0.005 0.005 65.511 0.003 0.000 --------------#---
    END OF DIMENSION LOC1
© 2024 Hexagon AB and/or its subsidiaries. Privacy Policy | Cloud Services Agreement