1. #1
    Hi,

    We are looking at getting a CNC (8' x 4') router, we are going to be cutting 9mm birch panels.
    I am just designing a Vacuum Table system to allow us to have 6+ vacuum sections on the bed, i found a great tutorial from a US source.

    The question i have .. if using 50mm piping to create the vac distribution system under the table with cut off valves for each section. What grade of piping and valves should i be looking at?

    Many Thanks!
    James

  2. #2
    No personal experience but a place I visited some time ago used solvent welded waste water pipe. Sorry but I never noticed the valves.

  3. #3
    I would have thought any grade of piping would do, so long as it is rigid. If you produce a perfect vacuum you will have an external pressure on the pipework of 1 bar. This is minimal compared to the internal pressure that most pipes take. Class C pcv pipe will take an internal pressure of 9 bar for example.

  4. #4
    Quote Originally Posted by pavlo View Post
    I would have thought any grade of piping would do, so long as it is rigid. If you produce a perfect vacuum you will have an external pressure on the pipework of 1 bar. This is minimal compared to the internal pressure that most pipes take. Class C pcv pipe will take an internal pressure of 9 bar for example.
    The pressure for a vacuum though is in the opposite direction to which the fittings are designed for. Perhaps could make a difference... but I'm only guessing!

  5. #5
    Quote Originally Posted by Jonathan View Post
    The pressure for a vacuum though is in the opposite direction to which the fittings are designed for. Perhaps could make a difference... but I'm only guessing!
    Should not be a problem if using solvent welded pipe.

    Bruce
    The more I know, I know, I know the less. (John Owen)

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