All relevant documents can be found here
Team Vision for Detailed Design PhaseThe goal of this phase is to finalize the design, engineering analysis, simulations, test documents, and engineering requirements. ISO and ASTM standards were further researched and applicable standards are shown in the engineering requirements. The mechanical system was designed in CREO and the electronics system was outlined. Coding was experimented with as well.
Progress ReportThe ISO and ASTM standards were reviewed and incorporated into the engineering requirements and the test document. The electrical system was laid out and the mechanical system was modeled in Creo. Our bill of materials is completed and we are just under the budget and weight requirements.
Notes for ISO and ASTMIS020957-1
Design and Flowcharts
Prototyping, Engineering Analysis, Simulation
Treadmill Frame Analysis
Factor of Safety: Xs=16.25
Vertical Beam Compression Analysis:
Max deflection due to Loading of 0.04"
Frame Analysis for Lifting Case
Max Von Mises Stress:2761 KSI= 19.03642 MPA
Factor of Safety: Xs= 9.8
Max Von Mises Stress=51 psi=0.35 MPA
Pulley is safe for motor torque.
Motor AnalysisMotor Analysis was completed in Preliminary Design review the following motor was selected.
There are two main requirements for the motor:
- Able to hit 2mph at max RPM, Using a 2 pulley system
- Provide the Required start up Torque to the belt through the pulley system
Possible DC Gearmotors:
Analysis for MDF BoardStress and Life analysis were calculated for the current MDF board design.
- Load applied as point load in middle of board
- Homogeneous Isotropic Material
- Board can be analyzed as a Beam
Factor of Safety: Xs=17.613
Life: 1.84*1015 cycles
The Analysis can be found here
Drive Belt Length
Drawings, Schematics, Flow Charts, Simulations
TreadTread is to be purchased from a company who makes custom treadmill belts to dimension. To fit the need of the portable treadmill it will have to be made 14" wide and have a total length of 51". For vendor information see BOM.
Arduino SoftwareThe open-source Arduino Software (IDE) makes it easy to write code and upload it to the board. It runs on Windows, Mac OS X, and Linux. The environment is written in Java and based on Processing and other open-source software.
Finite State Machine/Flowchart
Motor ControlAlso includes emergency shut-off Motor Control Code
Hall Effect Sensor/Speed
Arduino to LCD
Power Supplies & Power On/Off
Motor Control Circuitry
Bill of Material (BOM)The Total BOM is located HERE. Page one represents last review and page two represents the changes/additions since then. Page two is the current BOM.
The Mechanical BOM is locatedHERE