Cutter Comp. is one beast to figure out. On some machines you have to use half the dia. of the actual tool, (.500) on other machines you use nothing, on others you have to figure out the difference between the actual tool dia. and the tool used to program the tool path. Like when you use a sharpened tool. Your cutter comp might be -.015 or something like that. Either way you will have to use G41 or G42 in your programming depending on which side of the line you are cutting on. G42 is the right side. G41 is the left side.
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