Re: Tool nose radius G42 and G41, T=
Not sure about the tornos, but on a B0204 a standard front turn tool would be G41 Tool position 4 when programming Z+ (feeding out of guide bushing)
Same tool position, G42 if going Z- (into guide bushing)
The fact that the tools on the right gang are updide down does not affect anyhting at all. They are still on the same side of the cut, just clocked 180* apart from the front gang.
If the right gang tools were facing up, then G41/G42 would be reversed and position would become 3, but because the left gang is facing up and the right gang is facing down, the Cutter comp and tool nose position is the same as the Left gang.
Make sense?
CNC Product Manager / Training Consultant