I saw the awesome video visualizer for hollowing on Trent Bosch's YouTube and because I'm cheap and a pack rat, I had everything I needed to make it for free! It was very simple to do and now... no more guessing as to how close my cutter is to the edge when hollowing .
All you need is an old Webcam and a laptop computer. So I could keep my laptop further away from the lathe, I used an old monitor for the video output and a USB extension cable for the camera. Most laptops (at least the older ones anyways) will have a VGA or other port that will allow you to use a 2nd monitor or projector.
I built a platform for the monitor that goes on and off a wall bracket easily so it's not there if it's not in use.
All you need is an old Webcam and a laptop computer. So I could keep my laptop further away from the lathe, I used an old monitor for the video output and a USB extension cable for the camera. Most laptops (at least the older ones anyways) will have a VGA or other port that will allow you to use a 2nd monitor or projector.
I built a platform for the monitor that goes on and off a wall bracket easily so it's not there if it's not in use.