Waste collection and abatement during hybrid additive and subtractive manufacturing

An assembly for controlling waste material during hybrid subtractive and additive manufacturing, the assembly comprising:

• a machining tool held in a tool holder;
• a shroud disposed around the machining tool;
• a first port that is formed in a wall of the shroud, wherein negative pressure within the shroud is caused by applying pressure through the first port via a conduit, and wherein swarf is evacuated through the shroud into the conduit;
• one or more air ports that are connected to a source of pressurized air by one or more throttling valves;
• a controller that controls a rate of evacuation;
• and
• a camera connected to the controller to detect a buildup of the swarf,
• wherein the controller, based on detection of the buildup of the swarf by the camera, is configured to adjust flow of the pressurized air through the one or more air ports by automatic adjustment of the one or more throttling valves, and wherein the automatic adjustment of the one or more throttling valves is in accordance to a build program that runs on the controller.