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Retract distance problem

I just had Cad++ installed and I am having problems when I probe a hole and my probe retracts past the center of the hole and hits the back of the hole which inturn retracts and hits the front of the hole and goes into a loop of back and forth hits. I went to F10 then to motion and changed my prehit and retract distance but it did not help at all. Could a setting changed when Cad++ was installed? If so how do I fix it?
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  • Are you using AutoCircles? If you are, prehit and retract have nothing to do with autocircles.



    why do you think this? It is incorrect.


    Sorry, but that is not incorrect.

    If his prehit is .250 and his hole diameter is .200, PC-DMIS won't try to ram the probe through the part to achieve the .250 prehit distance. It'll adjust the prehit distance to fit in the hole.

    I asked if he was using Autocircle because adjusting his prehit distance won't make a difference if he is. If he is constructing circles using vector points, then his prehit distance will be a factor.



    Let's say partially correct then shall we?

    What you say about holes smaller than the prehit/retract is correct for most of the newer versions of Pc-Dmis.

    Do this: Put a large diameter ring gage on your table. Set the prehit and retract for almost as much as the radius of the ring gage. Use Autocircle to measure that diameter. Did prehit and retract have anything to do with the autocircle????

Reply
  • Are you using AutoCircles? If you are, prehit and retract have nothing to do with autocircles.



    why do you think this? It is incorrect.


    Sorry, but that is not incorrect.

    If his prehit is .250 and his hole diameter is .200, PC-DMIS won't try to ram the probe through the part to achieve the .250 prehit distance. It'll adjust the prehit distance to fit in the hole.

    I asked if he was using Autocircle because adjusting his prehit distance won't make a difference if he is. If he is constructing circles using vector points, then his prehit distance will be a factor.



    Let's say partially correct then shall we?

    What you say about holes smaller than the prehit/retract is correct for most of the newer versions of Pc-Dmis.

    Do this: Put a large diameter ring gage on your table. Set the prehit and retract for almost as much as the radius of the ring gage. Use Autocircle to measure that diameter. Did prehit and retract have anything to do with the autocircle????

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