Thank you. I'll try it. The lead in & lead out were already there (I think). The router goes to this position & plunges before the first cut ;
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000
No, that's not a lead in move. See the attached pic for the lead-in and lead out move I added. Comp can not be added correctly (if at all, not sure) during a plunge move. Comp is applied from the point before the G41 (Tool center is at that location) to the position after the G41.
You can't use G41 T1, it must be G41 D1 for tool #1. You can also use G41 Px.xx, where x.xx is the tool radius. Or you can just use G41 and Mach will use the current tool.
Here's a sample with an inside cut and an outside cut which will hopefully clear things up for you.
One last thing. You technically don't need a lead out move, but I like to use it. If you don't, the tool will "jump" when comp is turned off. The lead out move gets the center of the tool back to the commanded position during the move, not abrubtly if you just turn off comp without it.
And yes, Id program sheetcam without the offsets, and manually add the leadin and leadout myself, as well as the G41. Unless sheetcam can do it. I don't use it, so I don't know.