Shredder Drive: Difference between revisions

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*Brushed motor is 75-80% efficient. [https://www.google.com/search?q=efficiency+of+brushed+motor&oq=efficiency+of+brushed+motor&aqs=chrome..69i57.4377j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]
*Brushed motor is 75-80% efficient. [https://www.google.com/search?q=efficiency+of+brushed+motor&oq=efficiency+of+brushed+motor&aqs=chrome..69i57.4377j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]
*We can try a small DC motor, 30W. This yields a theoretical 12 kg per 12 hour day grind rate, which is just about correct. [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]
*We can try a small DC motor, 30W. This yields a theoretical 12 kg per 12 hour day grind rate, which is just about correct. [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]
*Ex. JYCRS390H -  [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]
*Ex. JYCRS390H -  [https://www.amazon.com/AUTOTOOLHOME-Torque-Traxxas-Wheels-Electric/dp/B01M58POHF/ref=psdc_306577011_t1_B01L6EKGGQ]. Not 30W. Appears to be 5W - [https://www.amazon.com/AUTOTOOLHOME-Electric-Drill-Motor-Drills/dp/B01LZYWFE4]


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Revision as of 22:02, 28 May 2020

Calculations

  • Largest force comparison- 15,000 in lb or 173 kg m.

Shredding Rate

  • Precious plastic shredder - what is shredding rate of precious plastic shredder? 3kw, 50kg/hr. [1]
  • By comparison, we have 5W steppers. Minebea_Stepper_Motor_Specs
  • This allows us for 3000/5=600x less throughput. This means that for 12 hour run time, we get 1 kg of shred.
  • This is minimal, but doable for production.

First Order Shaft Torque Calculations

Motor Torque

Geardown

Belt Geardown

Gears

Planetary Gears

Motor Choices

  • Brushed motor is 75-80% efficient. [2]
  • We can try a small DC motor, 30W. This yields a theoretical 12 kg per 12 hour day grind rate, which is just about correct. [3]
  • Ex. JYCRS390H - [4]. Not 30W. Appears to be 5W - [5]

Internal Links