Ryobi ® Reciprocating Saw Group 1: Christopher Clark John Sequeira Rishi Wadhera Jonathan Lin Danielle Launay

Objective  Real-life Application of course material  Model and Analyze an already accepted system  Find Problems and Suggest Solutions

Challenges  Advanced Designs and Mechanisms became Difficult  Large Numbers of Connections Created Errors Within Program  Minimizing Human Error

Assembly and Mechanisms

Gears

Gear Assembly  52:6 Gear Ratio  Transmits Power from Motor through Saw Bar  Transfers Rotational Energy into Translational Motion  Space Efficient

Saw Bar  Slider Connection to Gear allowing the bar to only move in one Cartesian plane  Shear Stresses Applied to Shaft Create Maximum and Minimum Forces Shown:

Blade  Most Critical Part of Assembly  Highest Risk of Failure  Point Stress of 300N (67.5 lb f )

Motor Design  Copper Coils  Location  Size  Magnetic Fields  Rotation Speed

Operation

Mechanism

Suggested Improvements  Increase Power  Motor Size  Coils  Increase Blade Strength  Material  Size  Cost