fit tolerances

Hello i'm a young mechanical engineer,

I have a system composed of 2 parts. they fit thanks to 3 guides that each have +- 0.03mm tolerances. how do i calculate the total tolerances betwen the two parts ?

Also if you have any source for how to calculate tolerances on complex part i'd be eager to hear that.

Any help is appreciated.

submitted by /u/mrlichens
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