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

[grain_r]

I have been working on a mockup for the Gantry at the moment too, The frame is pretty much there

I am working on a movable shelf at the moment so the material will be much higher than the bottom is at the moment but this is if I wanted to create fibreglass moulds for the full height work.


Stemming from my original design I didn't think enough about losing the width of the cut when the gantry plates go to the end.
I originally planned on the Hiwin carriages further forwards and giving a larger gap between the carriages. but not I am thinking the the base plate will then be flush with the front of the Ali Profile and then the x will be allowed to slide further across giving me the maximum cutting size that I can.

the downside of this is that the main load will be on the front carriage but I'm also thinking this will be a plus point, not a negative point the Carriages will be an 80mm gap between each other and I think it looks right.

the Base plate won't be like the block it will be 2 plates of 10mm Tooling plate to make it 20mm thick and it will go across and hold the ballscrew block too.


Originally it was designed to make a plate that goes further forwards to make the spacing larger and the load sit between the 2 carriages better.

I can always change it in the future if I get any issues.

Because everything is so expensive at the moment instead of using epoxy to level the rails I am going to use some Ali profile that I already had for a job that I didn't use to save a few pennies. I can always use Epoxy in the future if it isn't as level as I hope but I will be able to check that.

thanks

Rob