[tangeray]

Hey all,

Im wondering what would be a good design for the spoilboard on a 48X48 CRP machine. I havent built it yet, but wondering what to make the surface of the spoilboard look like with T-track and guidelines.

2 Questions. Is the attached file overkill for a spoilboard surface?
Its 1 inch squares with T-track rails running through it and its 48X48. Its cut to .15 inches with an engraving bit for the squares and a .5" endmill for the T-Tracks down to 3/8"

Attachment 184506

Second..Can some people maybe post pictures of their spoilboards so I can get an idea for what is useful and what is overkill? Also any vacuum table pictures are appreciated as im thinking of building one also.

Thanks,

Chuck

[BanduraMaker]

What's the purpose of the 1" squares on your spoil board?

Here's a picture of my Vacuum table. The "squares within squares" are to mount needle plates to keep work from squirming.

[tangeray]

That table looks great! What are needle plates?

I was thinking that the squares would be used for alignment and measuring, but I'm starting to think that they might be not needed for that purpose. The t tracks seem more useful than the squares.

Could you maybe post or send some video of that table in action? Did you build it or buy it? Thanks

Chuck

[BanduraMaker]

You can see some more info regarding needle plates here: CNC Components | Birkonium CNC Services They are these 20x20x3mm plates with very fine needles sticking out. They keep work from moving under cutting loads.

For your table, I don't think you'll find all those squares that useful. Scribing or drawing just a few with a pen would be plenty. I have a few lines scribed on my vac table every 1/4" for the first inch in the x and y directions for rough alignment. It's useful if the stock is cut close to final dimensions. If I need perfect alignment, I use other methods.

Made the table myself. Don't really have any action shots - apply work - turn on pump - it sucks.