Vacuum table Setup Advice

[andy_con]

been trying to do a vacuum table setup but an failing badly.

I purchased this -

http://www.ebay.co.uk/itm/CNC-Vacuum...item487aa50799

and today I got the uni-jet 75

http://www.cattaniesam.co.uk/suction...ry/uni-jet-75/

the guy from ebay recommends 3cfm, if I worked it out correctly the uni-jet does 1250L/min which is 44cfm. so in theory plenty of suck.

got a 32mm pipe coming out of the vacuum pump, then just before the table reduced down to 10mm as that's what you need to plug into the vacuum table. length of pipe maybe 2 metres

when on and you try to move the work piece with your hand, you can but its bloody hard, its stuck down pretty dam well. you have to really really force it to get it to move with your hand. but when trying to machine it, it seems to move so easily.
I'm using a 6mm cutter, with a z depth of -0.5mm with a feed rate of 300mm/min

anyone got any advice?