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  1. #1
    Hi all,
    i'm new to the forum so excuse me if this post is in a wrong place.
    So here is my problem:
    I'm looking for a decent material to use for my DIY CNC router cutting bed (working area of 800x480mm). I need it to resist moisture as my router is in a garage that gets really damp during winter, and my current bed (plywood + mdf on top) expands and contracts like crazy.. I do a lot of V carving so a flat bed is a must.
    So at the moment I'm considering 20mm thick acrylic or 20mm HDPE sheet. I'm looking to spend up to £100 if possible. The entire bed size is 1100x620mm.

    So what do you guys think I should do? I just need a material that will resist moisture and bending.

    CHeers, Kamil

  2. #2
    There is a sign material called Foamex, I use a 19mm thick sheet, you can drill and cut it like MDF, but it's moisture resistant as it's plastic, it's nothing like perspex btw
    Martin

  3. #3
    Thanks Maxakarudy,
    Is it also a rigid material that won't deflect much while cutting?

  4. #4
    Quote Originally Posted by mondrota View Post
    Thanks Maxakarudy,
    Is it also a rigid material that won't deflect much while cutting?
    You will need something that you can drill and tap into as well.
    ..Clive
    The more you know, The better you know, How little you know

  5. #5
    Yep,
    I have an industrial router, that's what most sacrificial beds are made of

  6. #6
    Ok, so I have 3 options now. I checked this foamex on ebay and it is much cheaper. I can drill holes and glue in t nuts at the bottom. I'm just a bit concerned about the rigidity of this material. It is a light foam material after all..

  7. #7
    19mm is very rigid, find a local sign company, they might have some to show you and could get you a sheet, Ebay is way too expensive
    Last edited by Maxakarudy; 14-12-2016 at 11:57 PM.

  8. #8
    Quote Originally Posted by mondrota View Post
    Ok, so I have 3 options now. I checked this foamex on ebay and it is much cheaper. I can drill holes and glue in t nuts at the bottom. I'm just a bit concerned about the rigidity of this material. It is a light foam material after all..
    How about Rigid PVC BLACK PLATE/SHEET 1520mm x 1300mm X 25mm THICK

    ebay item number: 152320149415

    Machineable, tappable, solid!

    A bit big for your purpose though? Maybe he would cut it??

  9. #9
    Thanks for all your input, I'll see how I get on and will keep you informed.

  10. #10
    I've been looking for the trespa Athlon stuff, I was quoted £90 plus VAT for a bloody off cut 600x400.

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