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[...] i am building out of wood so [...] there quite a bit of friction.
[...] is there a tool out there i could use that would how much force was needed
Add a counterweight and you can negate most of all the force required to do the lifting.
No, overcoming the friction is only part of the force to overcome.
Soeren: What would you suggest instead of a stepper ?
I think a stepper *is* the best idea.
"Loot" a big one from an old printer or something,
and you can make it go in circles with just 3 transistors and an old PC printer port
(or anything more fancy if you're wanting to make it more complicated than necessary).
The benefit of the stepper is that you'll know exactly how far you've moved your frame
- if youre stepper does 1-degree steps, and you've sent 360 of them - you know it's done a full rotation... that's really easy to program into whatever scanner software you're coding. If you use anything other than a stepper - you're going to have to build some extra stuff to measure how far it's moved after - loads more effort...