How can a single electrical motor control a robot? or even a mechanical arm?

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Discussion Overview

The discussion revolves around how a single electrical motor can control a robot or a mechanical arm, exploring the mechanisms and systems that allow for diverse movements beyond the motor's inherent capabilities. The scope includes theoretical considerations, mechanical design, and control systems.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant notes that an electrical motor converts electrical energy to mechanical energy but questions how it can produce diverse movements when connected to a mechanical arm.
  • Another participant argues that multiple motors, linear actuators, servos, and sensors work together to create movement, emphasizing the complexity of control systems involved.
  • A different participant suggests that with clever gearing and mechanisms, a single motor could enable a robot to perform limited movements, referencing toy robots that operate without a control system.
  • One participant expresses realization about the potential of tiny motors to facilitate movement after reflecting on the topic.
  • Another participant mentions that hydraulics could also be a viable option for designs utilizing a single electric motor, citing impressive all-mechanical systems as sources of inspiration.

Areas of Agreement / Disagreement

Participants present various perspectives on the capabilities of a single motor in robotic applications, indicating that there is no consensus on the extent of movement achievable with just one motor. Multiple competing views remain regarding the mechanisms and systems involved.

Contextual Notes

Participants discuss the limitations of single motor designs and the dependence on mechanical configurations and control systems, but do not resolve the complexities or assumptions involved in these designs.

Who May Find This Useful

Readers interested in robotics, mechanical engineering, and control systems may find the discussion relevant to understanding the interplay between motors and mechanical design.

Femme_physics
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So an electrical motor converts electrical energy to mechanical one. But an electric motor can just produce a single motion in of itself. How come connecting a mechanical arm to it allows a diversity of movements like rotation, verticial and horizontal motions to both directions!?
 
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Becuase it's not a single motor that creates the movement. You'll have many motors, linear actuators, servos and sensors all working together.

It also involves the mucky, horrible world of control systems.
Controls engineers use computer jargon and witchcraft to magically create a set of signals which creates a well choreographed movement of all the actuators.
 
I'm guessing that with a clever enough set of gears and mechanisms you can make a robot that can preform mechanical movement which can consist of movements in a few directions and speeds using a single motor. Like those toy robots that walk and stuff, of course they have no control system and there movements have to be predetermined.
 
That is a very interesting concept.
 
*smacks forehead* I realized the answer an hour after making this thread after I saw really tiny motors were possible. :) Thanks.
 
berko1 said:
I'm guessing that with a clever enough set of gears and mechanisms...
Yep. Hydraulics offer another option for a single-electric-motor design.

I've seen some truly amazing all-mechanical systems. A good source for inspiration is the book, "Ingenious Mechanisms for Designers and Inventors".
 

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