Re: [CAD_CAM_EDM_DRO] re:Re: re:Re: re: IJK interp

I'm not exactly sure what you mean by "which control".

However, it works as follows:

G02 and G03 are both circular moves. G02 moves the cutter in a clockwise
direction and G02 moves it counter clockwise. R+ indicates a move of less
than 180 degrees. R- indicates a move of more than 180 and less than 360
degrees.

As an example, picture (better yet, for a good visual picture draw it in a
CAD program or using graph paper and a ruler and compass) this:

The tool is located at X1 Y1. (Start point "A")
You want to machine an arc that ends at X2 Y0 (End point "B" )
The radius you want is .875 inches
Using the begin and end points as centers draw arcs having a .875" radii.
These will intersect at two points.
Use the intersection of these arcs as centers and draw two intersecting
circles.
You should now be able two visualize the possibility of 4 ways of getting
from point "A" to point "B"

G02 R.875 X2 Y0 will start at point "A" and move in a clockwise direction
along the upper short path to point "B". The arc will measure 107.83
degrees.

G02 R-.875 X2 YO will start at point "A" and move in a clockwise direction
along the upper long path to point "B". The arc will measure 252.17
degrees.

G03 R.875 X2 Y0 will do exactly the same thing as the G02 R.875 X2 Y0
command EXCEPT it will move counterclockwise along the lower short path.

G03 R-.875 X2 Y0 will do exactly the same as G02 R .875 X2 Y0 except it will
move CCW along the lower long path to point "B".

As you can see...in both cases, adding the negative sign after the R
indicates a move of more than 180 degrees.

To write these using the IJK method, I'd have to calculate the actual XY
offsets to locate the center of the desired circle.

Does that help any?

Smoke

>What control does this apply to?
>
>Ballendo
>