Best Of

CAM Studio doesn't accept sketches it appears. As a pretty messy workaround you can create a new part though that extends the slot out to make the cut appear to the toolpath generator as a full pocket. See V15 for an example.

https://cad.onshape.com/documents/d995b98ce1b6ff36e8577afb/v/e7df65bac0ca6b4f476d7ecc/e/8b41428cd68c2ab3fe6a5a3a

For a single slot this isn't too bad but for a complex part I can see this workflow being pretty tedious.

Draw your desired path. Then do an offset the width of a brick. Then draw your bricks. The longest side of each brick should be equal to the length of your brick and the shortest edge should be normal (shift+k) to your path.

Can CAM Studio take a sketch as input? If so, you could create a sketch that duplicates the slot dimensions, plus enough extra at either end to let the cutter clear the stock or ends of the slot.

Okay it's solved now so update to the latest version.

I confirmed it was an update to the FeatureScript Standard that did it, but I want to call out that it wasn't a change that would have broken any deployed features or caused anything to regenerate differently. It just changed how things like Editing Logic and Manipulator Change functions worked (i.e. what the feature does when you change something in the feature UI dialogue). The change they made actually solves many other headaches I've had and makes this feature better too. In the past, if you used a variable to control one of the points, then added or removed a point, it would clear the variable reference and replace it just with the static value, which was quite frustrating. Now they stay put! Thanks dev team!