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Auto Cone extracted from a COP

Scott Staral @ WAFCO
We have Romer arm here with an RS3 laser on it.

I am having issues with the auto cone feature. I want to do an auto cone and then generate a circle from the auto cone, either by intersecting with an existing plane or by using the cone feature under construct a circle and create a circle at a given height.

If I take individual auto points and construct a cone, I get the results that I expect. I have been doing it this way for a couple of years now. Recently I tried to incorporate the auto cone feature into my programs and I can not get smart as to what is going on with this command.

Ex. Part I am currently working on, if I construct a cone from individual points and intersect that cone with a plane or construct a cone at a given height I get the result that I am looking for....in this case a circle with a diameter of 7.194"( verified with a caliper ). Now if I extract the same cone via the auto cone command and intersect this new cone with the same plane as above, I get a result of 7.394" and if I construct a cone at a given height( same height as the above mentioned plane ) I get a result of 6.560"

Has anyone else experienced weird result like this?

I have contacted tech support twice on this subject and have yet to get any kind of straight answer on this?
Parents
  • Our models here always have the correct draft angles on them. We make our own models here. The patterns are made from our models. It's not always a draft angle I am measuring....I have also had cone features that were part of the casting design ( nice cones ) that when done with auto cone, come up way off.

    Since you mentioned that draft angles do not make nice cones ( vertex far away ) , I assume you are talking about the constructed cone. Again, the results that I get from the constructed cone isn't what I have an issue with. If you look back at my original post, I verified my results with a caliper. The result from the constructed cone and the caliper matched. It is the auto cone that gave the wrong results. It would just be nice If I could trust the results from auto cone. Only reason I would like to make more use of the auto cone feature is that it reduces lines of code. On average I take 20 surface points to construct my cones. 20 lines of code versus 1 line of code for each cone feature.

    I have had auto cones give results over an inch off on a 9 inch dia. circle, way beyond measurement error.

    Tech support finally did remote in last week( after I posted this thread ) and saw what I am talking about. That person did not have an answer. They said they were gonna get other people involved. That is the last I heard from them. If I am doing some thing wrong, I would like to know what that is. I don't think I am though, I think it is in the software.

    Thanks for your input.
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  • Our models here always have the correct draft angles on them. We make our own models here. The patterns are made from our models. It's not always a draft angle I am measuring....I have also had cone features that were part of the casting design ( nice cones ) that when done with auto cone, come up way off.

    Since you mentioned that draft angles do not make nice cones ( vertex far away ) , I assume you are talking about the constructed cone. Again, the results that I get from the constructed cone isn't what I have an issue with. If you look back at my original post, I verified my results with a caliper. The result from the constructed cone and the caliper matched. It is the auto cone that gave the wrong results. It would just be nice If I could trust the results from auto cone. Only reason I would like to make more use of the auto cone feature is that it reduces lines of code. On average I take 20 surface points to construct my cones. 20 lines of code versus 1 line of code for each cone feature.

    I have had auto cones give results over an inch off on a 9 inch dia. circle, way beyond measurement error.

    Tech support finally did remote in last week( after I posted this thread ) and saw what I am talking about. That person did not have an answer. They said they were gonna get other people involved. That is the last I heard from them. If I am doing some thing wrong, I would like to know what that is. I don't think I am though, I think it is in the software.

    Thanks for your input.
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