Drilling not working on piping

[LM_10399399]

I'm using Creo Parametric Release 9.0 and Datecode9.0.1.0

I'm trying to produce a hole into a cylindrical object (pipe). Neither the drilling feature nor the revolver- or profil feature manage to produce this drilling regardless how it ist set up. I tried it with offset and planes, different diameters of the drilling and every trick i could think of. Funny enough the profil feature has no problems making a shape of any kind instead of a round or elyptical hole. It seems it has a problem with the radius as even elyptical holes or everything with a radius seem not to work. Despite everything the axis will be shown in the part and even the outer surface of the drilling if marked in the feature tree. What surprises me the most is that the error wasn't present before yesterday as i have made dozens of those kind of parts in the past few days with simillar or even the same kind of features without any problem.

Here are the errors that I faced :
Despite producing a complete shutdown of Creow with a critical system error when trying to produce elyptival holes there are no other error warnings present.

[jchelle]

Dear member,

Thank you for posting this issue regarding wrong behavior of Creo Parametric 9.0.1.0 on your machine only apparently.

It would be nice to know what happened on your machine yesterday as such issue was not present before.

In order to investigate this in a better way I propose you to open a case with Technical Support.

I will communicate the case reference in private message.

BR

Jean-Claude

[jchelle]

Dear member,

Thank you for your information about accuracy tests that you are running actually on your models.

Your tests with smaller and smaller accuracy on same model seems to drive to such wrong behavior in Creo Parametric 9.0.1.0.

Starting with Creo 9.0.0.0 , PTC changes the default accuracy of the models from Relative accuracy to Absolute accuracy.

Using too small value for model absolute accuracy will impact Creo performance most of the time.

If you need more information about such change , please refer to article CS332639 .

Jean-Claude

[BenLoosli]

I hate to be nit-picky, but PTC changed the default to absolute accuracy at Creo 7! 

It is even referenced that way in the CS article you referenced.

[tbraxton]

If you are using start parts that use relative accuracy, then a Creo 7+ model using the start part will also have relative accuracy.

If you think it is an accuracy issue. Change is the length of the pipe on this problem model. Limit the length of the pipe to about 3 to 5X the dia of the hole you are adding to it. If it is an accuracy issue this will likely allow the hole to regenerate. Obviously confirm the accuracy setting on your parts.

Post a model for review if possible.