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Spoilboard Thickness

Discussion in 'General Talk' started by Neil Scott, Jan 15, 2020 at 7:48 AM.

  1. Neil Scott

    Builder

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    Hi everyone

    I have a new Lead 1075 I am building over here in sunny but cold Spain and its time look & think about getting the spoilboard now while I do the electricals.

    Can you please advise on what the ideal thickness for one is.

    I have over here in Europe available to me 12 mm, 19mm, 22mm and 25mm MDF which seems to be the most used board, I did think about marine ply then realised there could be issues in surfacing it.

    or do i go for a thinner board and a sacrificial board on top that I can surface and toss away every now and then.

    Either way I am planning on installing claw nuts and cams for my hold downs rather than T tracks unless there is any good reason not to?....

    My new spindle is a water cooled inverter 0.8 kw ER11

    My old baby CNC had a T track aluminium plate and I used thin slats of MDF in between and then surfaced it but always found the clamps were getting in the spindles way.

    Many thanks for all your help.

    Neil
     
  2. Alex Chambers

    Alex Chambers Master
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    There isn't an "ideal" thickness for a spoiler board - it depends on what you want to do and how much Z clearance you need. I have a workbee - it has two options for the height of the spoil board supports - I did a modification and went halfway between. I use an 18mm thick mdf spoil board which gives me 50~60 mm in the Z axis (depending on bit length). I mostly work with thin materials so I put another layer on top - for repetitive jobs this can have custom fixtures on.
    Alex.
     
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  3. Neil Scott

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    Thanks Alex good Idea, most of my work will only be on 25 to 30 mm stock maximum I would think. I will give it some thought. thanks again.
     
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  4. rscamp

    rscamp New
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    I have almost no practical experience with CNC routers but I decided to go with a secondary sacrificial waste board small enough to be fully cleaned up when resurfacing. This allows longer or wider pieces to be placed on the bed without hanging up on a lip.

    I'm in North America so the main board thickness is nominally 12.7mm and the sacrificial board on top is 19.05mm. If a job requires more Z travel I figure I can remove the sacrificial board.
     
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  5. Alex Chambers

    Alex Chambers Master
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    If you look at the end of my build report (Workbee with Duet controller) you will see the comprise I made for the spoil board supports. I used some (cheap) T-slot instead of V-slot and had to add support under the middle of those longitudinal members.
    Alex.
     
  6. Neil Scott

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    tha
    thanks for the idea.
     
  7. rscamp

    rscamp New
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    You're welcome. I would post a picture if I could. I'm new on the forum and I'm guessing that I can't do this until I have a certain number of posts...
     
  8. rscamp

    rscamp New
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    Shared image file:

    Wasteboard Design Workbee 1050
     
  9. Giarc

    Giarc Master
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    When you are posting, there is the option to upload a file. Also if you click on the icon that looks like photo above the text box you have the option to insert the image url.
     
  10. rscamp

    rscamp New
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    I see an option to "Upload a File" under "Media Gallery Embed". Here we go...
     

    Attached Files:

  11. rscamp

    rscamp New
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    Here's the actual Workbee 1050 with the spoilboards installed. These boards are attached with M5 hardware.

    One of the first tasks with the router once I get it cutting will be to flip over the sacrificial spoilboard and machine it to accept the array of T-nuts pictured in the CAD model.
     

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