Analysis of part positioning
Functional tolerancing of mechanism

The mechanism is broken down into "blocks". There is a fixed block and a block for each subset of kinematically linked parts. A purchased component such as a motor is considered a block.

In each block, select the base, which is the first part on which the other parts or blocks are then assembled. Then define the order in which the parts are positioned, one by one, during assembly.

The structure of the mechanism can be...