Hi in case it helps, I just saw this on another thread: Acrylic on Maslow
A camera to attach to a CNC to help locate it: https://ezletter.en.made-in-china.com/product/xsqmWgaHvpku/China-Ezletter-CNC-Engraving-Machine-Spare-Parts-Eye-Cut-Camera-in-Customized-Plastic-Cutting.html or here: http://www.ezletter.in/eye-cut.html
Which led me to this site on camera based zero’ing: http://beatty-robotics.com/zeroing-a-cnc/