Stell frame cnc 1500X1000. Adjustable table your opinion please

[ba99297]

Hi guys
Guest what?Today i start building
Here is my progress


It is too late now that i am writing
I will continue tomorrow


Thanks for your help




Vagelis

I edit the post in order to explain the photos
First of all i didnt get 6m long pieces. In order to lower the cost i choose for the lower base of the machine to go with pieces that a friend had.

Too rust but not as bad as it looks


Then i had to cut them. Good for me my friend has a big steel saw so it was easy



Bak to my home i start to make my "floor welding bench" by laying two 3,3m long pieces of steel.




I dry the rods in the oven
And i start by making the two big pieces 1,9m long as my machine has 1,9 length
The steel box section that i get from my friend pieces are 1,5 long so i had to weld them in order to make the 1,9m long that is the bigger piece.



Then i level my floor welding bench and i start


First i make the rectangular piece off the table try to keep everything square. Then i add the foot an the diagonal pieces



As i had read many times here in the forum i try to start with spot welding and not with big welding joints in order to avoid distortion. Firtsly that was easy but that make me think that the construction will have no distortion.
That was a mistake
After i finished the table ( lower part ) i realize while checking with an aluminium profile ( that supposed to be straight ) that the table has distortion issues
The following photo shows the aluminium profile when i check the diagonal from one corner to the oposite

It seems that the aluminium profile has 7mm distance from the table.
I use a jack in order to corect the bending but with no big success


Good for me i reaslize that the problem is at the midle of the table, as the 4 corner( lets name them 1 2 3 4) are all at the same level. I use a digital level. First i messure τηε gadient between corners 1-2 and i zero the level. Then i continue by messuring the relative gradient f between corners 2-3, 3-4, and the diagonals 1-3, 2-4. All the messurement show 0.0 gradient. Also 0.0 relative gradient i messure between the front and the back beam. That i s good as i can correct any mistake at the next steps (weld the upper 1,9m long beams where the rails will rest) before i apply epoxy.
Now i am waiting for the 6m long beams to contruct the rest of the table



The big problem till now is the weight of the table.
I can hardly turn it upside down
Tomorrow i will put a winch on the ceiling in order to deal with the weight that will be more than 300kgr ( without the gantry)

Thanks for your time

Vagelis