G03 programming

[Farzaneh_2010]

hello
I write a program about G02 in delphi that draw a cicle and i used Startpoint EndPoint and Start Angle and End Angle.so i used this parameters in G03 but it is not right.do you have any idea bout G03 and parameters?How can i draw cicle exactly?Is another way? but i can not use arc.
please help

[holbieone]

G2 = CW

G3 = CCW

just exchange the start point with the end point and end point with the start point

Graphically other then direction an arc is an arc

[Farzaneh_2010]

thankyou
i changed the start angle and end angle.is it need?

[holbieone]

i think your lost , it does not matter what direction your arc is going in the plot

you have a start point and an end point :

90 degree arc starting at 0.0 degree

center point = 1 , 1

start point = 2 , 1

end point = 1 , 2


G2 = CLW

G1X1.0Y2.0Z0.0F50.0
G2X2.0Y1.0Z0.0R1.0



G3 = CCLW

G1X2.0Y1.0Z0.0F50.0
G3X1.0Y2.0Z0.0R1.0


your looking for points , G2 , G3 pass direction to the machine

just swap the points

[bernster]

Farzaneh
If the first coordinate X,Y set on the first line is the start point of the circullar move, it is not actually a part of the circular motion itself.
Try to use more than just the 2 coordinate X,Y sets when commanding a move.
An 'arc' is an 'arc'. It is is not a circle, it is not itself, a closed motion contour.
At the beginning of the arc move, the indexer will remember that coordinate set.
Gcode command lines refer to X,Y sets as " go to here" commands, not "go from here". The G03 or G02 refers to "how will it get there". The indexer will calculate the move in a positive or negative direction. The line you may think is the first line of the circle is really the end point of another motion command.
Try giving the indexer, on the first command line of the actual, circular move, the coordinates for the 1/2 way point of the move, then on the second (last line), give it the end coordinates of the circular move.
Remember to include the reference coordinates for I and J, absolute or incremental depending on the machine indexer type on the actual first line.
or if the indexer needs a radius and/or an angle then include these instead.
Hope this helps a little.