different tips - different readings

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  • different tips - different readings

    Good morning,

    I have a cmm program that uses one size tip to pick up the datums and do the alignment at A0, B0 then I pick up 2 holes, one at A90, B0 and one at A90, B180. If I check the holes using the same tip I used during the alignment I get one set of numbers for the hole locations. If I do a tip change to a larger diameter stylus to check the holes I get a different set of numbers. The locations for the hole sizes change by over .006". Any idea what would be causing this? I originally wrote the program to use the same tip for everything but decided to change it later to use a larger size tip to avoid the possibility of shanking out in the holes. Both tips have been caliberated for all angles used this morning.

    PC-DMIS V 4.0
    PH10M - TP200

    Thanks !
    t.
    Global Image 555
    PH10M-TP200
    PC-DMIS Cad ++
    Win7 64 bit
    V2014.1

  • #2
    Did you calibrate both tips at the same time? They need to relate to each other
    sigpic
    if you had soap on a rope it would be tied to yer ankle

    Comment


    • #3
      YEah, for the second tip, you MUST tell it that the tool has NOT moved.
      sigpic
      Originally posted by AndersI
      I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

      Comment


      • #4
        Originally posted by T Miller
        Did you calibrate both tips at the same time? They need to relate to each other
        Originally posted by Matthew D. Hoedeman
        YEah, for the second tip, you MUST tell it that the tool has NOT moved.
        Did you calibrate A0B0 on both tips? That angle is used to relate one tip to another tip.

        Comment


        • #5
          Oh, also if you are un-screwing pieces and putting other piece in, your calibration is GONE. You will NEVEr get the same pieces screwed back in the same way twice, so everytime you screw, you calibrate.
          sigpic
          Originally posted by AndersI
          I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

          Comment


          • #6
            Originally posted by Matthew D. Hoedeman
            Oh, also if you are un-screwing pieces and putting other piece in, your calibration is GONE. You will NEVEr get the same pieces screwed back in the same way twice, so everytime you screw, you calibrate.
            Ohhhh there are so many ways to go with this but I will decline as we are attempting to be "proffesional"

            Comment


            • #7
              Originally posted by Goodluck
              Ohhhh there are so many ways to go with this but I will decline as we are attempting to be "proffesional"
              That's why I posted as I posted.

              But seriously, if you are NOT using the changer-type probe set-ups and you have to un-screw and screw in different pieces, you have to calibrate after each screw-in.
              sigpic
              Originally posted by AndersI
              I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

              Comment


              • #8
                Originally posted by Matthew D. Hoedeman
                That's why I posted as I posted.

                But seriously, if you are NOT using the changer-type probe set-ups and you have to un-screw and screw in different pieces, you have to calibrate after each screw-in.
                Yes, putting the calibration in the program is the easiest way to do it. The only problem is that you have to not move the cal. sphere.

                Comment


                • #9
                  Hello,
                  Are you using different modules rated differently. You can't accomplish this by changing the styli during the program with just one module and both tips must have the same force rating to be accurate.

                  VP A.Gore
                  sigpicA.Gore

                  Comment


                  • #10
                    I did not calibrate both tools at the same time. I only calibrated the larger stylus when I realized I needed it. Since the cal sphere had been moved the relationship was not set up correctly. I did not realize the relationship was set up that way. The problem has been corrected.

                    Thank you all for your valuable posts !!!

                    t.
                    Global Image 555
                    PH10M-TP200
                    PC-DMIS Cad ++
                    Win7 64 bit
                    V2014.1

                    Comment


                    • #11
                      Originally posted by dtmtim
                      I did not calibrate both tools at the same time. I only calibrated the larger stylus when I realized I needed it. Since the cal sphere had been moved the relationship was not set up correctly. I did not realize the relationship was set up that way. The problem has been corrected.

                      Thank you all for your valuable posts !!!

                      t.
                      Woo-Hoo problem solved! What do you guys want to discuss in this thread now?

                      Comment


                      • #12
                        BEER and BABES!
                        sigpic
                        Originally posted by AndersI
                        I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

                        Comment


                        • #13
                          Beer
                          sigpic

                          B&S Global 544
                          Using 3.7mr3


                          Peace
                          Greg


                          Nothin left ta dew but :) :) :) !

                          Comment


                          • #14
                            Beer
                            DR Watson shut me down again !!!! :mad: Smoke break:eek:

                            Comment


                            • #15
                              Whiskey
                              sigpic
                              if you had soap on a rope it would be tied to yer ankle

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