Re: [CAD_CAM_EDM_DRO] g02 I and J

HI
Yes the I and J are in relation to X and Y. Think of it as I is to X
and J is to Y. They are incremental values from current position to
centerline of the arc. G02 IS CW AND G3 CCW so if you want to climb cut an ID
you would use G03. If you wrote a little program to cut a 2.0Dia hole with a
.500 " Dia endmill it would look like (absolute):


G0G90X0Y0 :
G1Z-.125F10.;
X.75Y0. ;
G3 X.75 Y0. I-.75 J0;
(THIS ONLY NEEDS TO BE G3 I-.75 THE REST IS FOR REFERENCE)


G0G90X0Y0 :
(POSITION TO CENTER LINE FOR SAMPLE PURPOSE)

G1Z-.125F10.; ( FEED TO DEPTH FOR SAMPLE)
X.75Y0. ;
(X=(2.0-.5)/2 Y IS REDUNDANT BUT FOR SAMPLE PURPOSE)

G3 X.75 Y0. I-.75 J0;
( X AND Y BECOME YOUR ENDING POINTS AND I AND J DEFINE YOUR ARC
CENTER. I = THE INCREMENTAL VALUE FORM CURRENT POSITION TO CENTERLINE OF
ARC YOU ARE GOING TO SWING. J= 0 IN THIS CASE BECAUSE THE INCREMENTAL
VALUE FROM Y TO CENTERLINE IS 0 THIS WILL SWING 360 DEG TO COMPLETE A CIRCLE)

Hope this helps its I can give you samples of half circles and outside
contours but if you understand it - its all the same format.

Josh



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