G-code lesson

Hi,

Thanks to those who responded to my earlier question about tool
holder. Didn't express my appreciation earlier to save bandwidth.

Below extracts from Mike Lynch's lessons for radius compensation. I
alwasy thoutht that cutter radius compensation is the same as tool
nose radius compensation. Exactly what is the difference the two?

"Cutter radius compensation
Just as tool length compensation allows the machining center
programmer to forget about the tool's length, so does cutter radius
compensation allow the programmer to forget about the cutter's radius
as contours are programmed. While it may be obvious, let us point out
that cutter radius compensation is ONLY used for milling cutters and
only when milling on the periphery of the cutter. You would NEVER
consider using cutter radius compensation for a drill, tap, reamer,
or other hole machining tool."

"Tool nose radius compensation
This turning center compensation type is very similar to cutter
radius compensation. In fact the same three G codes are used. G41
instates tool nose radius compensation in a tool left condition. G42
instates with a tool right condition. G40 cancels tool nose radius
compensation"

ED