Programming by centerline, not radius off centerline

Traegerdacoda12 said:

I was talking to a programmer the other day and he spoke of a way to manually write your programs based off centerlines, and using your D value to compensate for it somehow.

EX. U have a 1 by 1 square to mill with a .5 EM, the only way I no is to mill it as a 1.5 block to compensate for the tool radius.
G1 y1.5
X1.5
Y-1.5
X-1.5

He told me he programs it as the drawing indicates. And makes up with radius offset.
G1 y1.0
X1.0
Y-1.0
X-1.0

Unfortunately he had to run before he could explain. But if anybody knows what he's talking about could you explain? It would save me hours in math.

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plastikdreams said:

He uses g41/g42 also known as cutter comp. You have to use the offset in the machine as well.

Hint: ditch the text message spelling if you want to be taken seriously here

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Delw said:

did you mean to type
EX. U have a 1 by 1 square to mill with a .5 EM, the only way I no is to mill it as a 1.5 block to compensate for the tool radius.
G1 y1.25
X1.25
Y-1.25
X-1.25

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Traegerdacoda12 said:

So when using cutter comp you can just write the program as shown in the print? Do you have to do anything special at all, or just put your tool radius in this case as .25 and call it good? I always thought putting the cutter comp in would change nothing unless you change wear or geometry... And your right with the "text". Old habits die hard

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litlerob1 said:

Not quite that simple, but close. The entry/exit from the path has to be large enough to allow enough motion for G41/42 to activate and compensate.

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