Steel frame cnc router design/build

[Robin Hewitt]

Now let me ask you this Robin.! . . How many Steel framed routers have you built.?

Like this? None. Every router I have made has been job specific

[CraftyGeek]

Ok - design progress time.

I've been focusing on the frame/table so far - its now at a stage where i'm pretty happy with it & I think i've added everything that I meant to.

red = 60x60x4 box
blue = 50x50x3 box
green = 60x4 flat bar
orange = 50x4 flat bar

Rails are sat on 50x10 ally flat.

Ignore the floating guide leadscrew for now - its just there as a vague reference as to where i'm planning to put the leadscrews at the moment. Also ignore the holes going through the outside of the legs, they won't be there when I make it.

The frame has the ability to be adjusted for square in every direction. The cutting surface can be positioned in 5cm increments down the legs.
Both the lower surface & cutting surface will be covered in mdf added further bracing.

Hopefully this will mostly get nods of approval so i can move on & start thinking about leadscrews, motor mounting & the gantry in more detail.

[JAZZCNC]

Ok looking much better.!! . . . Take it you have decided not to weld.? If so Not saying this is bad thing if that's what your most comfortable with but will be a lot more work and maintenance. Mixture of both works best IME.

Only thing I see and question is DO YOU really need that much adjustabilty of the bed.? If not then I'd raise the lower frame and increase the triangulation. Will just help stiffen the frame a little.

Crack on.!!

[Robin Hewitt]

The wildly out of square comment just means he's been doing it wrong. .

Jazz will now tell us how far out of square is acceptable and I will stand by to say "Told ya so!" when it all goes tits up

You will require an angle grinder.

[CraftyGeek]

You will require an angle grinder.

I've already got one with a supply of thick & thin discs ;-)