Low RPM, High Torque on dry cell batteries

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SUMMARY

The discussion centers on designing a system that operates at 1 RPM with a torque of 0.6 Nm using dry cell batteries, specifically 6xAA. To achieve this, participants recommend using motors from Pololu's Tamiya motors and gearboxes or Pololu metal gearmotors. Additionally, a rotary encoder or a stepper motor with a small, single-stage gearbox may be necessary depending on the specific design requirements. The power required can be calculated using the formula P = Tω, where power (Watts) equals torque (Nm) multiplied by angular velocity (radians/s).

PREREQUISITES
  • Understanding of torque and RPM calculations
  • Familiarity with dry cell battery specifications
  • Knowledge of motor types, specifically stepper motors and gearmotors
  • Basic principles of power calculation in mechanical systems
NEXT STEPS
  • Research Pololu Tamiya motors and gearboxes for low RPM applications
  • Explore Pololu metal gearmotors for torque requirements
  • Learn about rotary encoders and their applications in motor control
  • Investigate stepper motors and their integration with gear systems
USEFUL FOR

This discussion is beneficial for hobbyists, engineers, and designers working on low-speed, high-torque applications, particularly those utilizing dry cell batteries in their projects.

D4ns4lmon
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Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How big would the motor be? Can you recommend any particular motor/gear system that would get the job done? Will dry cell batteries be sufficient? Any help at all in any of these questions would be greatly appreciated.
Thanks!
 
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You can calculate the power required from the motor via:

P = Tω
Power (Watts) = Torque (Nm) * angular velocity (radians/s)

(Google how to convert rpm to rad/s)

If this is a one off project one of, or a combination of a couple of these may work:
https://www.pololu.com/category/34/tamiya-motors-and-gearboxes
https://www.pololu.com/category/51/pololu-metal-gearmotors

Or you may need a rotary encoder.
http://en.wikipedia.org/wiki/Rotary_encoder

Or a stepper motor (and maybe a small, single stage gear box) may be better.
http://en.wikipedia.org/wiki/Stepper_motor

It all depends on what your design needs to do.
 
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That's brilliant Billy_joule, thank you so much for your prompt and helpful reply! The links are really useful and will definitely get me started. Thanks so much for your help!
 

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