The higher the resolution the higher the precision, as simple as that.
Sorry, but I do have to protest (very rigorously) about that statement!
Resolution and precision is two different things and while they often follow each other, that's not a given thing.
You can have an extremely high resolution and a lousy precision (and v.v.).
To take a recent example, imagine using a common threaded rod (with a pitch of 1mm), using a 100:1 gearbox and a 10 segment encoder on the driving axle of the gearbox - resolution=1µm
, precision=depends on how the rod was threaded, but nowhere near the resolution.
Using a 100 segment encoder on the same setup, your resolution would change to 100nm
, but would the precision change any?
The reverse could be true as well. Imagine the same but with only 1 pulse per revolution, or one in 10 revs for that matter - a lousy resolution compared to the precision.kunal5959 <-
The real question is, how can anyone ask about tolerances, ask about 1mm pecision and in the same post say 1.4m?
What is 1.4m?
As I read it, anything between 1.350m and 1.449m is within the given precision, as it is specified with a single digit.
If a single mm +/- is the Grail, the number should be 1.400m (or more correct in the mech business, 1,400mm).
Just as a sanity check, 1mm in 1.4m is a precision of 0.07%
and you won't get that, whether you use Mechanums or eg. rigid aluminum wheels.
When you make specifications for a project, always make plenty of sanity checks along the way - wishful thinking is for dreamers, engineering (however mundane) needs hard facts to be successful
Why do you think a precision of 0.07% (or 700 ppm) is important in this mechanical setup?
If it really is (which I somehow doubt), either throw in the towel or start looking for other means of achieving this by compensation
Like, if you need it to load something, you could use optical feedback while moving the last bit forward and/or back until you're in the precise spot.