On 28 April 2011 22:06, Viesturs Lācis <[email protected]> wrote: > Ok, thanks for the explanation! > Well, from my readings it seems that MDF is not a good choice, because > it is porous material and needs some additional treatment to have it > hold the vacuum.
I think trying to hold the vacuum is a mistake. The trick is to have plenty of flowrate and quite a poor vacuum. 0.5atm is easy to achieve, 0.001atm is harder, 0.0000001is really, really hard. But the second 2 are only twice the hold-down force of the first. The large number of holes are more of a leak than the porous MDF, the trick is to have enough flowrate to still have a decent vacuum underneath (though you can block of most of the unused ones with bits of paper). Caveat: I have never actually used a vacuum table. :-) -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
