Re: Helical ?? Interpolational Help Needed

George wrote:
What with lenght/diameter correction?? 

Do you mean the "I"? Or are you talking about the diameter of the
cutting tool?


I mean diameter & length cutting tool
G43 & G41 or G42

G00 X0 Y0 Z10           ;center of hole
G43 Z0                  ;bottom of hole <== with tool lenght comp.
G01 G41 X10             ;feed out to edge <== with tool diameter comp.
G02 X-10 Y0 I-10 Z.25   ;180' cut
G02 X10 Y0 I10 Z.5      ;rest of the cut
G00 G40 X0              ;rapid to center <== tool diam offset cancel
Z10                     ;rapid out
.