Why is CNC machining the process for producing robotic parts?

It Is Now Generally Accepted That Despite Their Growing Popularity, CNC Robots Will Never Completely Replace CNC Machines. One Big Factor Preventing Robots Advancing Becoming More Prominent Than CNC Machines Is That Robots Tend To Be Less Robust. There Are Technical Challenges In Terms Of The Hardness Of The Material Being Machined, CNC Machines Their Various Types (Cutting, Drilling, Turning) Have The Ability To Withstand A Lot Of Pressure, Speed, Heavy Materials. 

Depending On The Complexity Of The Final Part Required The Surface Finish Required, Robotic Machining Can Be Considered A Viable Alternative. CNC Machining Allows For Precise Control Of Surface Finish. In Many Robotic Cases Gripping Extraction Is Required, Part Flatness Surface Roughness Are Key Characteristics. CNC Machining Can Produce Parts With A Surface Roughness Of Ra 0.8μm, Even Lower With Additional Finishing Processes.

However, The Lead Time For CNC Machined Parts Is Shorter Than Many Other Processes. It May Take Only A Few Hours Design To Final Part. This Allows For The Rapid Iteration Improvement Required For Many Custom Robotic Applications. Precision Is Critical In Robotics. Robots Often Work Between Fixed Points In Space Cannot Tolerate Large Deviations In Dimensional Accuracy. This Is Critical For Applications That Require Precise  Highly Repeatable Motion. 

Firstly, Parts Used In Robotics Generally Require To Be Strong, Sturdy Lightweight. Materials Such As Aluminium Have Ideal Properties Can Be Easily Machined Using CNCs. Similarly, POM Is Often Used For Robotic Parts . It Is Easy To Machine Is Known For Its Low Friction, High Stiffness Excellent Dimensional Stability. As A Low-Cost Plastic, It Is Also A Very Economical Choice.

CNC Machines Robots Differ Slightly In Their Core Functions. Both Are Similar In That They Can Be Coded To Perform A Specific Task, But The Complexity Variation Of The Specific Task Is The Key Difference Lies. CNC Machines Are Highly Specialized To Make A Specific Type Of Part, A Set Of Finished Products. Robots Are Generally More Versatile Can Be Easily Adapted To Perform Different Functions.