Thread: What to use as sacrificial layer.

Originally Posted by Starfish

at my work we use MDF as a sacrificial on the CNC machines.....Unsealed....The worksheet is held down by vacuum that comes through the sacrificial from the bed.

We seal the sides of the sacrificial to not lose some vacuum.....seal with paint.

same on our machine at work but the vacuum pump 2 foot wide , 2 foot high , and a meter long with 2x 50mm hose connections running on 3 phase , not the sort of vacuum pump back yarder's are likely to use

the machine is designed for cabinet making has an auto sheet feeder , and loads its finished cut outs onto a moving belt too the edge stripping machine (out of Adelaide ) , the sheet to be cut takes up the hole size of the machines vacuum/ sacrificial 18mm MDF board , yes it sucks a vacuum through 18mm of MDF , it could suck the guts from an elephant through an eye of a needle and look around for a rhino for afternoon tea , the size of this pump