Effect of Forces on Gantry Cross-Sections?

[WandrinAndy]

How come you didn't make a drawing of how JAZZCNC quoted in your build log. I've knocked up a drawing of this and also think this is a great way to go.

I don't think that's what Jazz was suggesting Adil... If anything I think having the two 45x90's flat like you've drawn would be lots weaker towards the middle of the gantry than the 45x45 which I was going to go for... similar to your original design... because the profile rails are so far removed from the back plate!

I think Jazz favours the GREEN option for an initial DIY build which I'm now thinking is a far better option that what I designed.... I was thinking of using the GREEN at one stage but somehow dropped it and went off on a tangent after seeing your design pics. lol

My thoughts are constantly evolving, and while I am looking at changing things, may as well look at the box-sections too, but I really need to understand things, hence the reason for this thread.

I suspect that the PURPLE is too thin, so have added another option which I've attached below.

ORANGE - 127x51x6.35mm