this isn't for a cnc machine, but pretty similar..
So for our final project in undergrad engineering, we're building a 3d bike simulator. The idea is that you strap your bike to a lift mechanism that emulates the outdoors - complete with hills, bumps and water, for people who can't go outside for whatever reason.
here's some of my design sketches:
and a 3d environment that I built:
we're having some trouble selecting the motors and screws.. the problem is that we need a lot of speed to emulate hills and such, I'm thinking 30cm/second. At those speeds we either need a strong motor with a high-lead ball screw, or a stepper motor that can hold its torque over 10 000 pulses per second.
I found this motor torque graph from keling:
http://www.kelinginc.net/KL23H284-35-4BT.pdf
but I'm a bit suspicious of its claims since most other torque curves I've seen has one less zero on the bottom.
any ideas?