It is common setup to have two lead rods that carry a platform that needs to move on linear bearing. The platform itself is controlled by a separate lead screw connected to a stepper.
I'm looking for very lightweight and small setup and wonder what kind of problems should I expect if instead of two rods + lead screw I would use one rod and a lead screw that would use as second rail for the device.
I understand that the end of the lead screw (maybe start as well) need to be put into some kind of bearing to provide structural support and accuracy.
- What kind of problems should I expect if any? In terms of control accuracy stability, etc.
- What kind of support recommended for such a lead screw (one bearing, two bearings) and what kind (since standard bearings for example 8mm are actually bigger than 8mm lead screw)?
Edit: It is for movement of optical system. I mostly for accurate slow movement - i.e. the speed should be constant and as accurate as possible.