BlenderCAM - roughing and finishing pass 3D relief, performing tool change on GRBL 3018 CNC machine

BlenderCAM is really amazing, and although it's been version 0.9.0 for the last 5 years it is certainly being worked on by some very talented people. I use some of the cooler features of BlenderCAM to successfully do a 2 pass relief cutout using a fine 1mm ball nose bit. had some issues with the first attempt but the piece of wood i was using had a hole in it anyway. Had to switch controller boards to use usb. fyi, don't just leave the usb plugged into those boards while not in use, easy to crack a pin with that big cable hanging out.
fyi the new board works at 400 steps per mm with the same motors my old board used 800 steps per mm, looks to do the same quality work. I thought maybe the motors effected that setting more than the board but that does not seem to be the case. This board came preconfigured correctly for the 400 steps per mm, I looked at the current GRBL settings using the Engraver Master software.

[@bolaajayikofo4205]

How can you export the G-code from blender

[@ecv80]

Do you know if the operations are additive? Meaning when you rough and then finish, does the finish pass travel over the removed material, or does it try to cut through it again? Because in other videos it looks like the latter. Thanks.

[@OGmolton1]

it depends on how you generate the gcode I guess, technically the finish path tries to cut through that area again, it just actually can since it's all removed already, but only in the area defined in the limit curve. the blender objects blendercam generates are literally the tool paths.