Options for increasing vacuum suction

Modified on Wed, 07 Jul 2021 at 12:52 PM

There are a few options to increase suction. 

  • Start with 3/4″ medium density fiberboard (MDF).
  • Using a 2.5-4″ fly cutter with three blades, you should be spinning at 12,000 rpm at 30 meters per minute; using a 3″ fly cutter at 12,000 rpm, run at 25 meters per minute. Overlap each cut by about 1 mm
  • Take at least 0.5mm off both sides to remove the sealer that comes on all MDF boards.
  • Seal the four edges of your spoil board by either edge banding, or using a sealer (e.g. epoxy or rubberized paint) on all four sides to seal the edges for an even and maximized vacuum. This will improve suction on a vacuum table.
  • Use millfoam matt (CanCam has this product) in order to hold small pieces down more effectively 
  • Check all air pipes/connections for leaks when running the pump, go around and tighten what you visibly can.
  • Lift the spoilboard and inspect the gasketing for alignment in its groove. Make sure your gasketing is sticking up a 1/16-1/8 from the vacuum table. Listen for air loss when the pump is on, it will sound like a hissing noise.
  • Use the tabbing option in your CAD/CAM software to create a few tabs if the pieces you wish to cut out are thin or small.  
  • Make sure that your unused vacuum zones are closed if you do not have substrate/material on the spoilbooard in any open areas.  

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