Circular grid of holes with no partial holes

jon_smirl

I'm creating a speaker grill for injection molding. It is round and I'd like to punch an array of small holes into the large circle to form the speaker grill. I can make an array of rods, clip it to a circle, and then use it to punch the holes for the grill. But when I clip the array of rods to the larger circle of the speaker I get partial rods. How can I clip this so that I only get entire rods (small holes) and no partial ones?

philip_thomas

There is a Featurescript example that does exactly this - please try it out!

brucebartlett

Got a pic, I am struggling to visualise what you mean about the partial rods. 

traveler_hauptman

Manually deleting the rods on the edge seems like the quickest way. If there is a very large number of holes, you could write a Featurescript to create the grill for you.

jon_smirl

Consider drawing a circle on graph paper. I only want to include full squares inside the circle, not the partial ones broken by the circle.  This is because the partial circles are too fine of details for molding.

The wrap tab in this design shows the partial circle holes.
https://cad.onshape.com/documents/5bb44c3ff2a628f2d0bc081a/w/993649e1166c00c4b377bb95/e/81e7faf7f456cff88a836a8b

philip_thomas

There is a Featurescript example that does exactly this - please try it out!

rian_wendling

philip_thomas said:

There is a Featurescript example that does exactly this - please try it out!

Where can I find the Featurescript?  I'm trying to do the same thing.

philip_thomas

Ok, i could just post a link to what i think @rian_wendling and @jon_smirl are looking for, but let me teach you to fish.

Go to www.onshape.com/customfeatures and expand the 'more' section. There you will find the 'flood fill' custom feature that i think will do what you're looking for


Have fun

owen_sparks

philip_thomas said:

...but let me teach you to fish.

Ah the old "Light a man a fire and he'll be warm for a night; light a man on fire and he'll be warm for the rest of his life"  lesson...

philip_thomas

@owen_sparks - I had to read that twice before i got the joke!

Ok gents - does that do what you were looking for?

That one was written by the one and only Paul Chastell (wrote the first Onshape sketcher).
Its one of the few custom features (that what we call them in preference to 'FeatureScript' so that users dont think they have to write any code to use them), that i look at the code and still have no idea how it works! #magic

Its very cool!