calibration for the design and initial leveling

[RonVais]

i think i wasnt that clear about my design - so i sketched something to explain it alittle better (in the meantime im working on somthing more detailed)

any way i will not be using no i beams or H sections but regular rectangular hollow section steel tubes dimentions of 100*50*3.2 and 40*40*1.5

for the epoxy method i have seen some builders use that method - but are there any other methods?

[JAZZCNC]

i think i wasnt that clear about my design - so i sketched something to explain it alittle better (in the meantime im working on somthing more detailed)

any way i will not be using no i beams or H sections but regular rectangular hollow section steel tubes dimentions of 100*50*3.2 and 40*40*1.5

for the epoxy method i have seen some builders use that method - but are there any other methods?

Think I've told you this in another thread but those tube thickness's are not a good choice, esp the 1.5mm.

Regards methods of leveling then if you don't have any way to check the rail plane then you'll be better using the epoxy method as it gives the best accuracy for a large machine without needing a reference surface.

However, If this is your first machine build then I suggest you exercise caution and research much more than you have already. Many people think it can't be anymore difficult to build a large machine as it would be a small machine but in practise this isn't the case. Every little error is magnified and if you haven't learnt the gotcha's on a small machine then they will bite you hard on a larger machine, many first time builders fail when they try to build large.