topic Circular pattern using distance in Inventor Forum

Circular pattern using distance

Anonymous — Tue, 17 Mar 2015 20:06:40 GMT

Hi,

I need to do a circular pattern of a hole on a 45 degrees arc length. But it can't be based on a quantity of occurrences. I need one specific distance between each hole, lets say every 300 mm. I just can't figure out the formula required to obtain the result I'm looking for.

Does anyone remember how to do this?

Thanks,

Re: Circular pattern using distance

Anonymous — Tue, 17 Mar 2015 21:24:08 GMT

Try here: http://www.wolframalpha.com/input/?i=chord+length

Re: Circular pattern using distance

JDMather — Tue, 17 Mar 2015 21:52:13 GMT

Sounds like a Curve Driven Pattern.

Can you attach your file here?

Re: Circular pattern using distance

Anonymous — Tue, 17 Mar 2015 22:25:52 GMT

Hi,

you probably know this by now but:

if 300 is measured along chord (straight line) than you will have one hole every alpha = 2* asin(0,5*300/R)
if 300 i measured along arc (arc length) than you will have one hole every alpha [deg] = 360 [deg] * 300 / (2 * Pi)

in inventor you do not have to calculate any of those. Just do a additional sketch, or use one you have and in pattern make a link to appropriate dimensions.

would you need an example? if so post your file please.

Cris.

Re: Circular pattern using distance

Anonymous — Wed, 18 Mar 2015 16:02:57 GMT

Hi,

It seems I found a solution to my two related post. See below the link to it.

http://forums.autodesk.com/t5/inventor-general-discussion/hole-pattern-on-curve-surface/m-p/5502193#M536222

Thanks,