On Monday 28 April 2014 07:58:00 John Thornton did opine:

> Yes that will error with "Cannot make arc with zero feed rate."
> The correct syntax is:
> 
> G3 J1 Fsomenumber

Or it can use an already established feedrate, see my code in prev post.
 
> An unspecified offset is evaluated as 0.
> 
> JT
> 
> On 4/28/2014 2:08 AM, Steve Blackmore wrote:
> > On Mon, 28 Apr 2014 00:51:13 +0100, you wrote:
> >> On 28 April 2014 00:28, Gene Heskett <[email protected]> wrote:
> >>> so, assuming I have X at 0.000, and run Y to -1.000, what is the
> >>> correct syntax to make it draw a circle around the x0 y0 point
> >>> which is centered on the X0.000 Y0.000 point?
> >> 
> >> G3 J1
> > 
> > Doesn't that create an error? Should do as both I & J parameters
> > should be mandatory.
> > 
> > Steve Blackmore

Cheers, Gene
-- 
"There are four boxes to be used in defense of liberty:
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-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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