Comments sought on new build: A CNC Router for RC Gliders and Planes

[njhussey]

I really should stop playing about with the design and get on and build the damn thing.....but I keep reading posts on here and changing things. Was going to go with a framed gantry but then everyone says to keep the sides down to a small height to increase the stiffness.

Here's my latest design, can you guys comment on it please? It's going to be predominantly for cutting balsa and ply, the odd bit of plastic, carbon fibre and possibly aluminium components for RC planes, helicopters etc. There's only 100mm of height, but as the thickest balsa I'll be cutting is probably 1/2" it should be fine.

The box frame is 40x40x3 mild steel, the flat plate is 12mm 5083 Ali, the rails are SBR 16, most probably from linearmotionbearings2008. There are a few things which need tweaking to make them fit (Z axis bearing plate needs to be made the same width as the bearings etc.) so I'm aware of them, it's just the basic concept/design.