Present day CNC/Lasercutters have a indirect interface involving external computers. Chal-Kaat is a direct manipulation laser-cutter that&apos;s aware of the strokes being drawn on the workpiece. Video: <a href="https://www.youtube.com/watch?v=v63_z2-_jfs" target="_blank">https://www.youtube.com/watch?v=v63_z2-_jfs</a> Chalkaat is a pen stroke based UI for interacting with laser cutters, where the users can express themselves more directly by working directly &apos; on the workpiece&apos;. The camera on top tracks the strokes on paper. Different colored markers allow different commands to be executed. We built a laser cutter from ground up, with computer vision and mechanics to optimize for the interface.