I have a 60 gallon lag-lead vacuum system with lines going to all 5 machines. I use vacuum for everything I can. All the flat plates, alum castings, everything. I make all my own vacuum fixtures. I even have them running on the rotabs. (The rotabs have a Gerardi tombstone on them the width of the table with a tail rest, it's like a tombstone on a horizontal, only laying down, about 9" above the table)
If you do this sort of thing often, vacuum is the way to go. Otherwise, put a plate down, plastic, wood, alum, and tape it down or use toe clamps or both.
'Rekd teh vacuum sucks
Matt
San Diego, Ca
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)