I was thinking of ways to build a 1500mm Machine using Tr8*4 Acme screws and not get whip I have seen this type of config on other machinery, thought why not apply it to openbuilds Please let me know what you think of the idea I already have one Non Captive Nema 23 for Tr8*4
I would probably use a plate either side of the C Beam, to create a sandwich and hang the spindle from the opposing plate. I did give the use of Non-Captive motors on my prototype machine, a lot of thought, but decided the new design was enough to be getting on with. I'll be keen to watch your build happening if you go ahead with these motors.
looks like a Great idea - it's just like the spinning ball-nut concept - but simpler! Can you get 1500mm screws with decent torque steppers.