Hole type Pattern not centering properly

[fsonnichsen]

The construct in the attachment is simple enough--I generate a ring from a sketch with a circular rotation extrusion. Then I place a hole on the ring and finally duplicate it 5 more times about the ring. I use Create:Pattern for this.

 In order to do this, I select the original hole as my fist Pattern Object--then I select the center of the ring as my axis. The latter is somewhat nebulous in the doc but an axis appears when I place my cursor on the ring and I use this.

The result can be seen- the holes are not centered but offset--Only thing I could imagine is the axis that is generated it "off".  I played with construction for this but no better results.

Fritz

[etfrench]

The file doesn't seem to match the description: No holes, no patterns, no rings.

[fsonnichsen]

Good Grief!  That's what happens when I stay up too late. Sorry for the confusion. I have no attached the proper f3d.

thanks

fritz

[HughesTooling · Accepted solution]

You moved the component then used the document origin as the pattern axis.

[g-andresen · Accepted solution]

Hi,

no wonder if you use a wrong axis

günther

[fsonnichsen]

OK--I think i had selected a sketch:construction axis. When I tilted the diagram a bit I could see another set of axes which-I believe- coincide with the center of the circle. (no doc on this). Selecting this produces the result so apparently the two axis do not naturally align.

Thanks!

fs

[HughesTooling]

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@fsonnichsen wrote:

(no doc on this). Selecting this produces the result so apparently the two axis do not naturally align.

Thanks!

fs

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You moved the component (maybe just dragged by mistake) so its origin is no longer the same a the document origin. You've used a capture position to save the moved position. Some advice for when you get to making assemblies. Do not use Move and capture position, always use a joint. Actually if you're using Move on bodies or components then you're probably doing it wrong.

[HughesTooling]

Also it looks like when you created the pattern you didn't have the component active, you had the main top level active. When you create a pattern the active component's origin is made visible. If you'd had the Ring component active its origin would have been visible.

Mark

[fsonnichsen]

OK-There is a whole issue around move, capture, and the whole issue of relative positioning of parts that is not clear to me. Both the doc and a few books I have seem to like to "gloss" over this but I think it is one of the more important fundamentals of the project.   

   In general, the "capture" seems to be asked for when I do a lot of procedures. Also, I am thinking that they can be removed from the timeline without problems later. But certainly not clear.

Thanks for the additional pointers Mark!-

Fritz