Define the required motion, load, speed, accuracy, and repeatability
Set the tolerance stack-up for all critical dimensions
Choose materials with stable thermal and mechanical properties
Design rigid structures to minimize deflection and vibration
Use precision bearings, guides, and shafts
Minimize backlash with proper gear, screw, or belt selection
Select actuators matched to force, torque, and resolution needs
Include fine adjustment features for alignment and calibration
Use high-quality fasteners and controlled torque assembly
Design for thermal expansion compensation
Reduce friction with proper surface finish and lubrication
Balance moving parts to reduce wobble and wear
Protect the mechanism from contamination and moisture
Plan for manufacturability and assembly access
Machine critical parts with precision processes
Measure parts with calibrated inspection tools
Assemble in a controlled environment
Align components using jigs, fixtures, and reference datums
Test motion, repeatability, and positional accuracy
Calibrate and adjust until specifications are met
Document dimensions, settings, and assembly procedures
Perform durability and life-cycle testing
Maintain the mechanism with scheduled inspection and lubrication