Approximate a spiral with constant radius arc segments. This implementation uses the G2/G3 starting angle-ending angle-radius arc method. To approximate the spiral the radius is changed every 180 degrees. By changing the radius at the 0/180 or 90/270 angles the location of center of the arc remains fixed along the X or Y axis of the spiral. For the 0/180 angles the center is always on the X axis of the spiral. For 90/270 the center is always on the Y axis of the spiral. The
This example implements the spiral as a macro. Operations implemented as macro's do result in a larger program programs than the same operation implemented as a subroutine. The macro can be changed to a subroutine to reduce the program size. Program automation is used to access the macro or subroutine from user programs.
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