big budget cnc

[pet30]

my cnc is only for routing parts drilling etc the max thicknes is 50 mm MDF for shelves and cabinets 18 mm thick.
i know everything needs to be strong but if i weld the frame and bolt it to the ground is it not strong enough?

i was thinking making the frame like this

[Davek0974]

I would add some triangulation trusses to the box frames - stop it twisting etc.

If you were really good at carpentry there is no reason the base could not be made from timber, it would mean very tight joints and good design but the forces to resist for machining wood are not massive so i see no reason it could not be done. Cheaper in wood? I doubt it? Easier to build - not for me as i dislike wood and like metal but for a carpenter???

Anyways, that frame needs triangulation or it will wobble each time the spindle changes direction rapidly.

[pet30]

Well a construction wooden beam is 68mmx38mm and kost about 1€ per meter
steel 50x50x3 kost about 3 to 4 euro a meter

so it will be a lot cheaper but jes then i would make it with haf lap joist and srew en glue everything together
everything thats steel will be bolted trough the wood .

and triangulation trusses in both way's?

[Davek0974]

and triangulation trusses in both way's?

Definitely - the frame has to resist the thrust created by the spindle changing direction in all directions so a good sturdy base is essential. Downwards it needs to resist the weight of the material plus the force of the drill or tool etc, no sagging or spring so again, a good firm base is needed.

[Boyan Silyavski]

Without triangulation if you use min 80x80x3. Otherwise as others said.

Forget about "wood" and a "machine" in one sentence, "machine" and "steel" go better.

You constantly use the word "cheap" but i wonder how much you would charge for a custom kitchen and so in Germany? As i know what we charge here Germans in Spain and they find it relatively cheap. Forget that word, make the machine and start making money.

[Desertboy]

You could save yourself a lot of money and time if you buy this but how much it would cost to Germany I'm not sure.

http://www.ebay.co.uk/itm/Linear-mot...wAAOSwCQZZLelQ

I see an almost finished gantry when I look at this

[Boyan Silyavski]

I can not find in posts if sb mentioned it earlier but I think that from Germany this is the best thing he could buy http://www.ebay.es/itm/CNC-Set-20x-1...53.m1438.l2649

Ok, Not Hiwin. But Cheap, in Germany and supported square rail.