450x300 Aluminium extrusion build from scrap/used parts

[Nealieboyee]

Well 50x50 does not sound like a lot.
webbed in the bed it could be enough.

If you decide to go 50x50 at least make sure it is 4 or better 5mm wall thickness, much easier with tapping threads.

For the size i would go 80x80x4

The main thing is your total footprint.
It is 1000x700 right?

When you can run FEA on your design you know.

I did some basic checks on my design.
Quickly went for 80x80x4 bed and 80x120x4 gantry parts.

Get end caps on the box section.


I think you need to make the gantry as rigid as reasonably possible.

I went with the 50x50mm because it was free for 7.5m length :). If I go to 80x80mm, I will have to shrink the height due to the cost. The new 80x80mm design would look like the one attached. What do you think? I've also increased the free space between cutting bed and spindle to 130mm. My gantry is already 120x80mm.