what is "remeasure"?

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  • what is "remeasure"?

    question for you gurus out there

    What exactly does the "remeasure" do when checking a hole or cylinder ?

    I know it is "rechecking" the same feature twice, but what else does it really do? Does it give me "better" results?

    It hits the same feature in the same hit points....if it changed where it hits and then averaged the two samplings.....I might see an application for it

    thanks guys
    bob
    Which one gets ridden today? MPH vs MPG..tough choice, both are FUN
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    Starrett RGDC 4028-24 :alien:
    Demon vintages 3.7, 4.1, 4.2, 4.3, 2009

  • #2
    for example if you are measuring a hole thats out of position, it measures it the first time but obviously if its out of position it pulls some error due to that fact, it then remeasures it again using the x,y,z,i,j,k values it got from the initial measurement thus ensuring a more accurate measurement with minimum cosine error due to the fact the hits were not actually hitting what they were supposed to be.

    Back in the old days before the remeasure option was available, I used to always measure a hole then remeasure it using another feature with the target values set to the values of the previous measurement.

    Hope this makes sense

    Jon
    Last edited by jon_dav_uk; 08-04-2006, 08:45 PM.
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    • #3
      but doesn't the "find center" do that for you??.... adjust the actual position before taking the feature hits?
      Which one gets ridden today? MPH vs MPG..tough choice, both are FUN
      sigpic

      Starrett RGDC 4028-24 :alien:
      Demon vintages 3.7, 4.1, 4.2, 4.3, 2009

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      • #4
        Lots of times, remeasure is quicker. I have seen the FIND function poke and poke for a couple minutes trying to find the hole. Maybe it was because the hole was so small (and this was in a customer supplied program), but I changed it to READ POS and REMEASURE and it was a LOT quicker. Of course, it meant that the operator had to be at the machine, but pretty muchm the operator IS at the machine, so that was no big deal.
        sigpic
        Originally posted by AndersI
        I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

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        • #5
          Yes find centre also does that but due to it only taking three hits, I only trust this feature for doing what i says, ie finding the hole. To get the most accurate measurement, I always use remeasure. If it was a large tolerance I might only use find centre but for the additional time, I normally always just check the remeasure box anyway
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          • #6
            When you guys use remeasure, is it better to use theo or not? A lot of the programs here have used theo but I have found sometimes that it throws things off when using that in an alignment.
            Xcel & MicroVal Pfx & Global 37mr4 thru 2012mr1sp3
            Contura Calypso 5.4

            Lord, keep Your arm around my shoulder and Your hand over my mouth. Amen.

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            • #7
              Remeasure revisited

              Am looking for an answer to my question on this topic and would like to know if it is better to use "THEO" or not?????
              Xcel & MicroVal Pfx & Global 37mr4 thru 2012mr1sp3
              Contura Calypso 5.4

              Lord, keep Your arm around my shoulder and Your hand over my mouth. Amen.

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              • #8
                When programming, I've always plugged in the nominals that is shown on the print and that somehow is captured as THEO or Target. I do this after manual and initial dcc alignment and never had problems (allows me to stay away from the jogbox) - also if do this I won't have to plug in nominals for dimensioning.
                PC-DMIS CAD++ 3.7 from 4.2 MR1

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