Sturdy and Fast all Steel CNC , my first build

[Boyan Silyavski]

Let me ask something
I am planning my cnc 1500X1000 and i am very close to these plans
Is it better to weld everything together or make seperately the base and then the cnc machine that will "sit" on the table. I am asking because if i weld evertything together my construction will be very heavy ( difficult moved even by 3 or 4 people )
What is better
Solution 1
one unique construction ( both table and cnc together ) or

Solution 2
two seperate constructions( the cnc and the table). Will this second solution have stiffnees issues ?

Thanks for your time

Hi,

I personally chose solution 1, welded together. I prefer playing with additional fixtures, instead raising, lowering the bed.

Other people here on the forum however choose solution 2 . There will not be stiffness issues.

At the end is up to you. Now i am building another 1250x2500 and i also have the same doubts as it will weight considerably. Its worth noting that if not welded together, possibly you will have to use some more beams and at the end it will weight even more. For my 1250x2500 i am contemplating making a hybrid, half of the bed welded, half removable.

[ba99297]

It is possible i didnt make my self clear beacause of my english
Syliavski i will use your photo to explain
When i say cnc i mean the element A of your picture
and when i say table i mean the element B of your picture and not the cutting table
So the question is
Will i have any stiffness issues if make two different construction A and B and then let A rest on B
Or i must make one construction both A and B together in order to have more stiffness.
The problem is that if i make one unique construction it will be too heavy

Thanks for your time

[ba99297]

Thanks for your time

[Boyan Silyavski]

Hi,

the element A is a benchtop cnc 400x1000x200. The element B is not a table. It is another CNC, 1000x1500x200. It is the same, just scale the gantry.

So A is strong enough even if you put it on a simple table/strong enough/ . There will be no compromise of stiffness. Same with B.

In other words just follow B design if you like it. It would weight 130kg if following the design. Look at this thread also: http://www.mycncuk.com/forums/router...ddy-cnc-2.html to see it in real life

[ba99297]

Silyavski i know that element b is not only a table.
I just use it as an example of table in order to give you understand what i mean
So you tell me that if i make a benchtop cnc 1000X1500 and bolt it on a table ( whatever strong table that can handle such weight ) i wont have any problems right?

[Boyan Silyavski]

Silyavski i know that element b is not only a table.
I just use it as an example of table in order to give you understand what i mean
So you tell me that if i make a benchtop cnc 1000X1500 and bolt it on a table ( whatever strong table that can handle such weight ) i wont have any problems right?

Ok, I get it. If you use the same design and make a simple rectangular frame with the legs and diagonals on the legs, it would be rigid enough. If you use profile smaller than 80x80 you should use other design.