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Electro-mechanical Safety Lift for Self-spotting Bench Press Machine

Electro-mechanical Safety Lift for Self-spotting Bench Press Machine. Proposing Students: Chris Potts (EE) & Lane Caffaro (ME) Project Supervisors: Professor John Spinelli & Professor Jennifer Currey. Motivation. Everyone wants the perfect body

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Electro-mechanical Safety Lift for Self-spotting Bench Press Machine

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  1. Electro-mechanical Safety Lift for Self-spotting Bench Press Machine Proposing Students: Chris Potts (EE) & Lane Caffaro (ME) Project Supervisors: Professor John Spinelli & Professor Jennifer Currey

  2. Motivation • Everyone wants the perfect body • New training programs, dietary supplements, and workout machines • Maximize potential muscle growth • Working muscles until failure • Dangerous without a spotter • Work until lifter doubts he/she can lift the bar • No human spotter • Still augment muscle capacity with safety as a priority

  3. Data Subjects • Inexperienced lifter (53 years old) • Never lifts • Middle-aged male (41 years old) • Lifts approximately (1 time per week) • Male students (both 22 years old) • Lifts regularly (3-4 times per week) • Female students (18 & 20 years old) • Lifts regularly (3-4 times per week)

  4. Position Male (22) – 185 lbs. (failure) Female (18) – 95 lbs. (no fail)

  5. Velocity Male (22) – 185 lbs. (failure) Female (18) – 95 lbs. (no fail)

  6. Acceleration Male (22) – 185 lbs. (failure) Female (18) – 95 lbs. (no fail)

  7. Parameters • Vertical range: 1.2 ft, 2 ft. • Horizontal range: TBD (≈ 6 inches) • Velocity range: ± 1 m/s • Acceleration range: ± 4 m/s2 • Weight range: 65 lbs., 185 lbs.

  8. Automatic Lifting when unnecessary Foot pedal Inconvenience Voice activated Too much interference Manual switch on bar Obtrusive grip Control matrix Ease of use Safety Lifting at proper time Ease of installment Ease of operation Unobtrusive Cost Activation Options

  9. Design Requirements • Wireless push switch • Activates the system • Motors • Move up at a rate of 1 m/s • Capable of lifting up to 300 lbs. • Switch placed in the bar for comfortable grip • Output device • Repetitions, time • Maximum time to stop downward motion of bar after engagement: 0.5 s

  10. Hydraulic Design

  11. Hydraulic Design Design #1

  12. Hydraulic Design

  13. Design #2

  14. Side View

  15. Block Diagram

  16. Limitations • Assistance of hydraulics • Ability to lift up to 300 lbs. at a velocity of 1 m/s • Placing the switch in the bar to avoid obtrusive grip • Only normal wide-grip bench is applicable

  17. Goals • Phase 1: • Activating the system • Phase 2: • Lifting the bar safely • Phase 3: • Output device

  18. Fall term: IEF proposal (week 3) Gather data Position, velocity, acceleration (week 6) Horizontal movement (week 9) Angle of Bar (week 9) Finalize design (week 8) Design report (week 10) Order parts (week 10) Winter break: Complete phase 1 Winter term: Complete phase 2 (week 2) Complete phase 3 (week 5) Working prototype (week 6) Timeline

  19. Conclusion • Working prototype of a Self-Spotting Bench Press Machine • Even without a human spotter he/she can work muscles until failure • Safety is a priority

  20. Questions

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