Problem with G02/G03 full circles using IJK

["Mike Hornberger" <mike-at-autonomoussolutions.com>]

We just set up EMC and are having problems getting full circles to run using
I, J, and K.  Following are some working and nonworking code examples.  When
the circle doesn't work right, it seems to wait at the endpoint for the
legnth of time it would have taken to draw the arc, but there is no
movement.  After waiting, it moves on to the next line in the program and
continues execution.  Any help would really be appriciated!


This block does not work
%
G17 G90 G20
G1 X1.0 Y1.0 Z1.0
G3 X1.0 Y1.0 I.8 J0.0
%

This block works
%
G17 G90 G20
G1 X1.0 Y1.0 Z1.0
G3 X1.0 Y1.0000000000001 I.8 J0.0
%

This block works
%
G17 G90 G20
G1 X1.0 Y1.0 Z1.0
G3 X1.0 Y1.0 I.9 J0.0
%