Building a machine to mimic a robot...

[sdimelow]

Hi guys and girls,

I've been thinking over my plan, and so far I've come up with the following for the machine frame.





As you can see she's going to be a big old girl!

I'm in the middle of modelling a 2-axis spindle head too.


My questions are;

1. What would be best for Z axis motion, ball screws, chains, R+P?
2. Would properly sized steppers lift the Z, or are we in AC servo territory?

Any input appreciated.

Edit to add- Obviously I've made no effort in this model to make this actually buildable, I'll work out the details later.