Turning Archive 2004
Lyn J. Mangiameli
>IMO a vacuum guage is essential for safety as well as assisting in matching the vacuum level to the workpiece. I deliberately place my vacuum guage very close to line of sight when I am turning to be able to recognize any unanticipated drop in pressure. Not infrequently hidden flaws, vacuum induced transport of wetness or finishes out of the wood, or excessive thinning of areas will result in a vacuum leak that was not present when the workpiece was mounted. If you can't detect those as they occur, you can end up in a world of trouble from continuing to assume the mounting force you started with is still what you have to work with.