CamBam / FreeCAD 2D/3D MOP question Please help

[phill05]

I wanted to mill a simple semi circle slot along the horizontal plain of the material. The circular slot is to be 120mm long / 11.113mm deep


This picture is just an example I made so you can see what I am trying to do. I have milled the object all apart from the slot on the left.
What is the simplest way to do this ?.

I would draw the slot as a line longer than you need draw a semi-circle to the size you want and extrude the semi C along the line, create your tool path using a bull-nosed cutter, using center line of where you want to put slot across the part, use this as XYZ = 0 set your cutter & g-code to run from there, it should cut a semi-circle across the part.

Phill