Second CNC table build, here we go again....

**Davek0974** · 11-07-2015

Got the metal cut today...

Ends squared up and deburred, also cut,drilled and tapped the mount plates for the motion frame and the insert plates for the cross-beams. All ready for a welding session now.

I'm fitting castors and screw-down feet so I can move it about and level it up when assembled.

While I'm gathering info, extraction....

On my little table I built an air-box that sits along the front of the table between the now unused water tray and the slats...

In the front i cut a slot with an area bigger than the pipe cross-section and also slightly tapered towards the middle in an effort to even out the air flow. It works well as long as the unused parts of the table are covered - i get no muck in the shop at all.

It's connected to this radial blower...

I know I can get more out of it by dumping the corrugated pipe and fitting solid duct but it's not going to do a table with an area four times as big.

I don't have any spare power capacity so simply sticking a big-ass blower in there won't do it, need to get smart here. I could maybe run two of these blowers, they are pretty cheap to buy and with external motors they are immune to metallic hot muck.

I had thought about a zoned system - a four zone would work ok with the same blower. Question is, how would I do it???

Any smart ideas on extract??

Don't want water - its only half as effective and makes the machinery in the shop rust.

**Davek0974** · 12-07-2015

Welded the end plates into the cross-beams...

The leg joint plates onto the main beams...

And the foot plates onto the legs...

Fairly confident in the welds, did a quick destruction test on scrap first, nice and hot concentrating on the thicker parts and washing into the 2mm tube. Joints are ground flush now. Casters will be added soon, to the side of the feet, the feet can be screwed down to lift it off the wheels.

**Davek0974** · 18-07-2015

Got two welded side frames - standing side by side, there is no visible warp, I'm pretty chuffed with that as it was a concern. I levelled the frames between the bench and sawhorse using a spirit level

wedged them up, shimmed the bolting points between frame and top beams then tacked the outer and inner faces, seam welded the lower and upper faces fully, then seam welded the outer face, inner face is left tacked as there is a cross-bream to go in.

Its a bit bigger than my existing one

Looks good though.

Upon assembly i realised i could not weld in the lower cross-beams as planned, I'm not really up to vertical mig yet, cannot get it on the bench, and the underside welds could not be done at all. Answer - make some more bolt fitments out of 10x50mm bar, weld them on and bolt the lower cross-beams in, this will make disassembly easy too.