The G code offsets are usually modal, i.e. the remain in effect after you issue them until cancelled by a G40 etc, so you do not have to issue them for every line of motion.
The side that is offset (left or right) is as you are looking at the cutter from the rear, behind the motion of travel. With most systems you have to have a pre or dummy move at the issue of the first G41/42 into the cut that is greater than the dia of the tool, it then takes effect for every move after that until cancelled. Obviously the purpose of the tool offsets is that you program the part as exact size and the tool is moved over for its radius.
Al
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |