Ok, this is driving me potty.

All I want is for my 3mm endmill to sink into the material...cut a 3mm deep slot 50mm long, when it's at the other end of the slot, sink down another 3mm into the material & traverse back where we started...and finally one more time....*but* to save time, I want the tool to stay down - this is my problem, no matter how I attempt this, the tool retracts up between each successive cut (even when I deselect 'retract')

So essentially...

sink 3mm
move right 50mm->
sink 3mm (no retract just sink a further 3mm down)
<-move left 50mm
sink 3mm (no retract just sink a further 3mm down)
move right 50mm->

I should end up with a slot 50mm long & 9mm deep.

I'm using three individual toolpaths to achieve the above.....in each one the target is the same single line (contour), no offset (ie endmill progresses along the centre of the line), tip as the 'tip comp'.


What would be the best way to approach this?