a Steel Box Section Build with SBR20 & Ballscrews Plus a few questions

[grain_r]

So I still haven't finished my Frame still after a long long delay in making the CNC after house moves work and another daughter it's time to get this thing back on track again, when I started this I never in a million years thought I would still be making it.

Although I haven't been making any progress on my machine I read through the amazing posts on here most days still.



So I have been redesigning my original again and I have found that Item does a 45x90x90 10mm Profile

https://www.aluminium-profile.co.uk/...file-kjn992387

The plan would be to put the two together with bolting through one and then into 'T nuts on the second profile.

It will then be wider than the width of the frame to allow the full width of the cut (Which I didn't have previously)



I need to change the bracket so that it doesn't get in the way of the Z

It will have a movable shelf which I haven't added to the design in fusion 360 as yet so the spindle won't need to go right down to the bottom shelf.

It is roughly the same pricing as a 200x100 cold-rolled box section but I think it will be easier for me to complete the gantry with this instead of the steel and not have the resin to be put on to get the accuracy on the rails as time in the workshop is still limited these days.

Looking at the profile it seems pretty sturdy and it would have 5mm on each side of the rail to attach on the slots. But before I get too carried away with the design I thought I would check if this is a good possible profile to use.

Any thoughts would be most welcome.

Thank you