slaveboy2000:
I am working on a project that moves a heavy load either forward or backward to a specific location and I am looking for an actuator that would do that. My first thought was a pneumatic or hydraulic cylinder but those require a lot of space and are hard to precisely control. I then thought of a thread system like they have in 3d printers but I can't find a long enough or strong enough thread that would work for my purposes. Are there options I haven't considered or are there ways to better the options I have already thought of?
You have used adjectives instead of numbers/units. Use numbers and units if you want a sensible answer,
your definition of "heavy load" could be orders of magnitude different from mine, for instance.
What force is needed? What speed is needed? What accuracy? All in SI units if possible.