solution for thin material cutter by cnc router

The material sheet will move when cutting by cnc router, How to solve it ?
here is the solution:
some user said vacuum table is no good for material cutting , becasue the wood sheet will moving or  warped sheets problem here.
razortek give you the solution ,add the pinch roller, it is controlled by air cylinder pressure

there are two type pinch roller,first one for normal cnc , like RZ1325A series model, need control the pinch roller by manual., the roller will up or down by switch.
DSP or MACH3 controller can not control it ,.


Another one is controlled by controller, like Taiwan Syntec ,we mainly use this for our atc cnc router .
it will not affect the net working size. 
easy and simple to use, low cost. razortek always offer the good solution to different buyer.