Stell frame cnc 1500X1000. Adjustable table your opinion please

[Boyan Silyavski]

Thanks everybody for your advices

The plan that you suggest me to make Syliavski looks very strong and stiff. My question is how am I going to adjust that table if I have imperfections as cause of arc welding. The basic advantage of arc welding is the stiffness, on the other hand if I only weld and have no ability to adjust with bolts, I think is more than sure that my X axis rails wont be on the same plane. So I think that I will keep the solution of the bolt adjustment an replace the I beams with 80X80X3 or 4mmsquare beam. The Chinese says 1 picture 1000 words, I will design it and I will come back. Meanwhile I will be glad to hear any suggestion.

Thank for your time

Vagelis

Hi Vangelis

- between 80x80x3 and 4mm, the best choice is or 80x80x3 or 100x100x3 .
Why?
80x80x3 1m=7.17kg/m
80x80x4 1m=9.47kg/m
100x100x3 1m=9.02kg/m

Looking at their properties from my suppliers brochure the conclusion is that roughly the second is 20% stiffer than first and the third is at least double stiffer, hence for the same weight ~9.kg the 100x100 x3 will make quite stiffer machine structure



About soldering:

With careful thinking and careful soldering and only 2 big clamps i achieved a structure where not only is up to the mm precise but the beams are on one level and the supporting beams are on one level too. Nevertheless i will use Epoxy to level bellow the supported rails. As suggested by fellow members here i bought West system Epoxy with Hardener
from dansonmarine.co.uk who will ship in europe, contact them.
1kg of 105 resin and .33kg of 209 hardner, £45.00 per pack +£17 to Spain
Delivery is £17.00 to spain

It took me a whole day to weld it and i would not go other way. You can do it with a helper, 2 or even better 4 big clamps and a 2m aluminum profile or a real straight edge.
there is an procedure that has to befollowed, check my build or if you dont understand i will explain later.But mostly it consist of designing and welding "stair like" the individual assemblies, which at the end are soldered together in a "stair like" fashion. That means left and right part of the table should be finished first and then connected as suggested above.