New build help needed

[mekanik]

Well kind of but only has a minimum. I'd be more inclined to go with 80x80x5 on such large machine but 60x60 will work fine.



Dimensions will depend on your needs and gantry etc. I only drew this frame to show you and save explaining via text.
That said the dimensions I used where based on previous machines I've designed and are very close to those you mention.
From memory the short overhang was 150mm and the large overhang is the same length has the gantry width. Bracing on large overhang depends on gantry width but if more than 300mm then yes brace it.

Here's a 4x4 machine built using similair frame design but with adjustable height bed. Frame is 60x60x5 box.



Yes it's commonly done on really long machines but does need careful fitting. Thou If possible I'd avoid doing it.

Just a note, if joining rails the lengths have to be a different size, Hiwin Installation Manual says you should not have joints directly opposite each other,( I might have to join rails as i have already purchased some but need longer length)
Regards
Mike