RyobiRyobi® ® Reciprocating Saw Reciprocating Saw Group 1:Group 1:

Christopher Clark John SequeiraChristopher Clark John SequeiraRishi Wadhera Jonathan LinRishi Wadhera Jonathan Lin

Danielle Launay Danielle Launay

ObjectiveObjective

Real-life Application Real-life Application of course materialof course material

Model and Analyze Model and Analyze an already accepted an already accepted systemsystem

Find Problems and Find Problems and Suggest SolutionsSuggest Solutions

ChallengesChallenges

Advanced Designs Advanced Designs and Mechanisms and Mechanisms became Difficultbecame Difficult

Large Numbers of Large Numbers of Connections Created Connections Created Errors Within Errors Within ProgramProgram

Minimizing Human Minimizing Human ErrorError

Assembly and MechanismsAssembly and Mechanisms

GearsGears

Gear AssemblyGear Assembly

52:6 Gear Ratio52:6 Gear Ratio Transmits Power from Transmits Power from

Motor through Saw Motor through Saw BarBar

Transfers Rotational Transfers Rotational Energy into Energy into Translational MotionTranslational Motion

Space EfficientSpace Efficient

Saw BarSaw Bar

Slider Connection to Gear allowing the bar to Slider Connection to Gear allowing the bar to only move in one Cartesian planeonly move in one Cartesian plane

Shear Stresses Applied to Shaft Create Shear Stresses Applied to Shaft Create Maximum and Minimum Forces Shown:Maximum and Minimum Forces Shown:

BladeBlade

Most Critical Part of Most Critical Part of AssemblyAssembly

Highest Risk of Highest Risk of FailureFailure

Point Stress of 300N Point Stress of 300N (67.5 lb(67.5 lbff))

Motor DesignMotor Design

Copper CoilsCopper Coils LocationLocation SizeSize

Magnetic FieldsMagnetic Fields Rotation SpeedRotation Speed

OperationOperation

MechanismMechanism

Suggested ImprovementsSuggested Improvements

Increase PowerIncrease Power Motor SizeMotor Size CoilsCoils

Increase Blade StrengthIncrease Blade Strength MaterialMaterial SizeSize CostCost