... .vacuum holding down surface 4-6 zones 3.CE large size cnc engraving machine JCM1830 Application : Wooden door Cabinet doors, Furniture Decoration, ... clamps for fixing the workpieces . 6 zones suitable for different size workpieces DSP Controller, with USB interface, reading G code ... inverter with Yako 2811 drivers, durable performances , higher working speed large size cnc engraving machine JCM1830