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  1. #1
    Member
    Join Date
    Nov 2011
    Posts
    6

    CNC with vacuum advice needed

    Hello,

    I have a CNC machine with a vacuum table of 120x250cm. I use MDF 10mm or 15mm, when I surface the sheet to get a flat surface the MDF sheet curvas outwards. Is this normal? what am I doing wrong?

  2. #2
    Community Moderator ger21's Avatar
    Join Date
    Mar 2003
    Posts
    33793

    Re: CNC with vacuum advice needed

    Yes, it's normal.
    Surface both sides.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

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    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
    Member
    Join Date
    Nov 2011
    Posts
    6

    Re: CNC with vacuum advice needed

    Thanks Gerry, will try.

  4. #4

    Re: CNC with vacuum advice needed

    once you surface it a couple times it happens as well. I find that once it starts to curl on the corners surface it and then flip it over and use the other side and its good for a little while again. that's on a 4'x8' mdf sheet

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