geneb wrote:You might want to take the opportunity to make your torsion box a vacuum plenum. That way you can use vacuum to hold things down that you can't easily clamp.
I've been thinking about it Geneb, but I'm not finding a lot of good information on that. I think if I went for a vacuum table, I would probably want to lift the machine up a little on the box rather than convert the whole torsion box, because it's a lot of cubic to empty, and a lot of extra joints to leak-proof. Unless I'm missing your point and you're suggesting routing the top surface, in which case I'm not entirely happy with the idea, considering I want a very sturdy table and am planning to potentially mount a different sized machine on it, so anything I did would have to at least be convertable to a much larger machine while not leaking too much. If I were doing a vac-table seriously, I think I would probably get a piece of HDPE or aluminum, somthing vaguely structural, and bolt it into the base of the machine under the waste board, instead of having to seal the base of the frame to the table. Not to mention that at least with the stock wasteboard, I would probably need a lot of grub-screws to keep the holes in it from letting all the nothing out.
Adarcher, one of our goals for this table is that we can store the machine in a smaller space. Thus the machine gets bolted down, but the table itself will be movable, with part of the idea being that when not in use, it can be stored on it's side in a much smaller area of space (Enclosed obviously). Even with a barn, we're starting to run out of space ourselves. So this thing may resemble an over-engineered folding table (Which would actually let us take it to various shows if we were crazy enough to try). But it would also work for keeping it in a garage and pulling a car out when you want to use it. Another option we've though about is putting in eyebolts, and suspending it. The table should be ~300 pounds at most with a stock X-carve, so even smallish 2300N working load eyebolts should be plenty (that is, a 560~ pound working limit, times between two and eight, depending on how many eyebolts you go for.) Use pulleys and a winch or something to lift it, and you could hang it from a wall or ceiling when you're not using it. Mind you, that's not always an easy retrofit to do in a workshop or garage. So unless you know your joists can handle the extra load, don't plan on it. But there's the option to build a structure somewhat like a gantry crane in your garage/shop, which can be useful for a lot of things.
Eric, There is such a thing as too many clamps for a workspace or individual. And that point is when the glue joint the first clamps are holding is dried before you've gotten the last ones on.