Quote Originally Posted by Glidergider View Post
Ger,
How about length of axis in the DIY machines. Do you agree that 4 feet is pretty much the limit for a screw drive? Given a 72 inch screw minus the allowance for the gantry width. But with a belt drive, longer is possible?

The attached image is my inspiration for joining this thread. The owner posted this machine in the Vectric forum. I hope it's ok with him that I repost it here.

I can't image buying an acme screw long enough to span that distance pictured.
Dave
My ball screw has 5' of travel. Of course, it is also 1" in diameter. ;-) There are screws available that are over 2" in diameter. They are heavy...