Power Duplicate - Even Concentric Shapes

[razorpig]

I'm trying to create a series of evenly spaced concentric shapes using power duplicate. I used CTRL + J then increased the overall dimension by adding +70px in the Transform panel ( see transform.jpg ).

Using power duplicate after this ( CTRL+ J ) I thought all the subsequent shapes would be 70px apart, but the gap increases exponentially ( see result.jpg ). How can I get the power duplicate function to just add 70px each time?

[Alfred]

The ‘power duplicate’ feature doesn’t currently offer an option to give you an arithmetic progression instead of a geometric one, so you have to resort to a workaround:

 

[razorpig]

@Alfred

Thanks Alfred - really appreciate you taking the time to reply.

Very disappointing though - this is way too much effort for something that should be pretty simple.

I'll just type +70px in the Transform box each time, unless there's a keyboard shortcut to repeat all those steps ( * add a thick stroke to the circle; * menu "Layer → Expand Stroke"; * menu "Layer →Geometry → Separate Curves"; * select the inner circle; * ) ?

[Gear maker]

FYI I actually use something slightly different.  If I need to have 10 circles that are 70px apart in diameter, use cmd J to duplicate the circle 9 times at the existing size.  I then make sure the center is selected and the aspect ratio is locked.  Save "+70px*" to the clipboard.  Click on the lowest circle's layer.

Press opt cmd }            to go to the next circle's layer

Click twice on either the X or Y dimension

Press cmd V                 to paste the +70px* to the base circle size

Press 2 and Enter         increment this number with each circle

Repeat

So far that's the easiest way I have found to do it.

[thomaso]

Another approach is to activate the (baseline-)grid with the desired distance and then repeat:

copy/paste + drag-scale:

[Latergator]

Re: Evenly-spaced concentric circles using a grid and subdivisions

This isn't scientifically accurate, but it may be useful where artistic rather than absolute microscopic accuracy is adequate. I used a grid and drew the initial circle so the top, bottom and extreme sides cover the respective subdivision borders of the grid; copy/paste, expand the concentric copy to the next square of subdivisions, etc. 

I've tried other methods (e.g., building progressively larger circles on adjacent layers of the Layers panel, but that "grew old" pretty quickly). 

So this will work for what little concentric circle work I do. Of course saving your best construction for future use would avoid having to "re-invent the wheel" each time.

 

[carl123]

This is an old thread but the new Spiral Tool can now be used to create concentric circles

A search of the forum will show you how

[NotMyFault]