[peteeng]

Hi Vily - So its 300 high and 200wide? Internal bracing not needed. External bracing has to be on edges not in the middle of a face. It can deflect / vibrate if loaded in the middle of a face. The webs you have added at the ends are not needed. The middle of the gantry is the bit that deflects not the ends. Peter or can you get 150x200x12?

does your CAD have FE? or simulation? a machine especially a Mill cannot be too stiff.

[Vilyoo]

yes 300 high and 200 wide, i have simulation, those are the steel available at my local store

tell me where to add load how many kN and i will simulate the deflection.

I have 2x 150x250x12.5mm at 2200mm long each. This is 160mm shorter than cad tube, maybe i can try to fit it, if it's needed.. can also extend it by 160mm because on the photo are leftovers 600 and 900mm and can cut from them



like this on the last photo, should i be worried about the weight it will reach 700kg with spindle and motor