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Can I measure this True Position?

Jegley
How can I measure this true position? Thanks in advance

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  • Do you guys have any advice on direct probing the threaded hole vs. using a Jo-Plug - in order to get the position of the hole?
  • in reply to Jegley
    Also - Does the mean the true position is constraining the orientation of the hole's axis?
  • in reply to Jegley
    if the measured feature is 3 dimensional then yes, perpendicular, parallel, and flatness of plane could be used also for or with the pattern.
  • in reply to Jegley
    measuring the minor with pitch can potentially give you MMC/ wiggle room which helps but not a whole lot. measuring with LaVezzies work but you cant add the MMC to your measurements.
  • in reply to Jegley
    How would you measure a number for of the pitch diameter to calculate MMC? You cannot use the minor diameter to calculate bonus since the screw locates off of the pitch diameter. Pitch and minor diameters are completely independent features
  • in reply to Jegley
    MMC isn't on the drawing. Neither is the diametric symbol

    Your code would look something like this: 

    ASSIGN/V1=1/24
CYL1       =FEAT/CONTACT/CYLINDER/DEFAULT,POLAR,IN,LEAST_SQR
            THEO/<3,35,0>,<0,0,1>,0.267,0.16
            ACTL/<3,35,0>,<0,0,1>,0.267,0.16
            TARG/<3,35,0>,<0,0,1>
            START ANG=0,END ANG=360
            ANGLE VEC=<1,0,0>
            DIRECTION=CCW
            REPORT VEC=<-0.1274052,0.9855405,-0.1117046>
            SHOW FEATURE PARAMETERS=NO
            SHOW CONTACT PARAMETERS=YES
              NUMHITS=7,NUMLEVELS=2,DEPTH=0.05,END OFFSET=0.05,PITCH=V1
              SAMPLE METHOD=SAMPLE_HITS
              SAMPLE HITS=0,SPACER=0
              AVOIDANCE MOVE=NO
              FIND HOLE=DISABLED,ONERROR=NO,READ POS=NO
            SHOW HITS=YES
              HIT/BASIC,<3.1103,33.5893,-0.11>,<-1,0,0>,<3.1103,33.5893,-0.11>
              HIT/BASIC,<3.1283,35.6915,-0.104>,<-0.6234898,-0.7818315,0>,<3.1283,35.6915,-0.104>
              HIT/BASIC,<3.0528,37.3214,-0.0981>,<0.2225209,-0.9749279,0>,<3.0528,37.3214,-0.0981>
              HIT/BASIC,<2.937,37.2721,-0.0921>,<0.9009689,-0.4338837,0>,<2.937,37.2721,-0.0921>
              HIT/BASIC,<2.8683,35.4303,-0.0862>,<0.9009689,0.4338837,0>,<2.8683,35.4303,-0.0862>
              HIT/BASIC,<2.9024,33.2314,-0.0802>,<0.2225209,0.9749279,0>,<2.9024,33.2314,-0.0802>
              HIT/BASIC,<3.0113,32.464,-0.0743>,<-0.6234898,0.7818315,0>,<3.0113,32.464,-0.0743>
              HIT/BASIC,<3.0113,32.464,-0.0143>,<-0.6234898,0.7818315,0>,<3.0113,32.464,-0.0143>
              HIT/BASIC,<2.9024,33.2314,-0.0202>,<0.2225209,0.9749279,0>,<2.9024,33.2314,-0.0202>
              HIT/BASIC,<2.8683,35.4303,-0.0262>,<0.9009689,0.4338837,0>,<2.8683,35.4303,-0.0262>
              HIT/BASIC,<2.937,37.2721,-0.0321>,<0.9009689,-0.4338837,0>,<2.937,37.2721,-0.0321>
              HIT/BASIC,<3.0528,37.3214,-0.0381>,<0.2225209,-0.9749279,0>,<3.0528,37.3214,-0.0381>
              HIT/BASIC,<3.1283,35.6915,-0.044>,<-0.6234898,-0.7818315,0>,<3.1283,35.6915,-0.044>
              HIT/BASIC,<3.1103,33.5893,-0.05>,<-1,0,0>,<3.1103,33.5893,-0.05>
            ENDMEAS/​
  • in reply to Jegley
    @ Mike Ruff
    your are correct but we do have customers that specifically specify this about the minor Ø to be used not just the point of contact with the actual matting edge. it would be nearly impossible to measure the root of the thread so minor Ø may be good enough for some companies.
  • in reply to Jegley
    thanks man, I didn't know you could probe holes like that. I tried it out and it worked.

    Does the lack of diametric symbol make a difference?
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