PATTERN

[Ringo]

Hello evryone:


Am workin in proe for abt 4 years now but still the circular pattern is a mystery to me. Well no problem if axis patterened but for which holes are equiangularly placed.


I table pattern holes at diff angles. It works fine.


But at times i see the holes are not created around the circle and instead reversed. I know a little its bcoz of wrong reference selectionbut it confuses me a lot.


Please explain me this


Thanks in advance

 

[vlad1979]

You can make multiple circular pattern it depends how many holes you have and if there is a "rule" of how they are repeated. Or you could use relations.


Do you have an example of such circular pattern. Can you post a picture?

 

[Ringo]

Thanks for ur reply ..


I know it was a problem with reference selection. Now its workin fine...


Still table gives some trouble - invalid values retry - but it works when i


convert a dimension circular pattern to table pattern - target is achieved


but still mystry continues ....

 

[Isair]

I have learned that if you want to create circular pattern, you must create datum plane on the fly at angle, when you creates feature that will be patterned.
Also very important is to reference whole sketch to that plane.

Since axis pattern I have never used again circular patter with dimensions...

 

[AHA-D]

As an alternative to an angled datum plane you can draw a construction line from center to feature, attach all of the feature to the construction line and drive this construction line around with an angular dimension on an arc that connects the endpoint of the line to a datum reference.


Sounds difficult perhaps but actually quite simple.


Alex

 

[prohammy]

AHA-D/Ringo,


Just a word of caution with using this method....


There are cases where your construction line and angular dimensioncross an axis and the pattern will fail during regen (not knowing what to do with the ang. dim.)


I find it is more robust to use a datum feature to control the pattern in these cases


Kev

 

[harrisonking]

just like he said.post a sample.i'll answer


you at soon.

 

[AHA-D]

AHA-D/Ringo,


Just a word of caution with using this method....


There are cases where your construction line and angular dimensioncross an axis and the pattern will fail during regen (not knowing what to do with the ang. dim.)


I find it is more robust to use a datum feature to control the pattern in these cases


Kev

I'm always using an angle dimension on a driving arc, which in turn drives wherethe angled line is going. Angles on arcs have no problem getting over 180