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

[grain_r]

Good Morning

Thank you for the replies, Thanks Colin I will look through the link very appreciated, Thank you Jazz yes the actual frame that I have pretty much built most up and has more bracing of each corner and I'm adding diagonal pieces on the Horizontals of the bed and then the second top shelf (not shown) will also be bolted to the mainframe to add more rigidity.

Because I had that part built its more of the Gantry design I'm changing from the 50x50 box Gantry I originally had as my design to the Aluminium Gantry, but I wasn't sure if the Gantry would be as good and as strong as the 50x50 Box design I had previously,




The profile I'm thinking I using is this but I couldn't find too much about the strength of it in terms that I understood (Me not clever enough not Bosch's information)



I will use the Profile to create a stable base to connect it to the Plate. the Screw and mounts will be put on ali plates because of the room available on the 45mm and I need 60mm width for the screen bk12 fittings.


But I like the words from Jazzcnc used Heavily then I will continue along that route with my design I haven't ordered the profile as yet and I'm trying to get the rails on order soon.


I see Aliexpress and ebay don't seem to all say Hiwin rails now although the part numbers they use are still the same.

Fred shows that he sells original Hiwin still and also a 3rd party range which seems to be a lower cost but has anyone used these instead of Hiwin or is it just false economy and just go for the Hiwin rails?


Thank you

Rob