Can increasing voltage or changing the motor size help maximize servo torque?

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    Servo Torque
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Discussion Overview

The discussion revolves around methods to increase the torque of servo motors, particularly in the context of a robotic arm. Participants explore various approaches including motor size, voltage adjustments, and mechanical advantages without reaching a definitive conclusion.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose replacing the existing motor with a slightly larger motor that has more windings to increase torque.
  • It is suggested that torque is proportional to current multiplied by the number of turns, indicating that increasing current may require thicker wires.
  • Changing the gear ratio to reduce speed for increased torque is mentioned as a potential solution.
  • Participants inquire about the type of servo and its application to better understand the context of the problem.
  • Concerns are raised about the physical space within standard-sized servos for accommodating larger motors.
  • Increasing the supplied voltage is suggested as a method to enhance torque, with caution regarding the need for wires and controllers to handle higher current values.

Areas of Agreement / Disagreement

Participants express multiple competing views on how to maximize servo torque, with no consensus reached on the best approach or solution.

Contextual Notes

Limitations include potential physical constraints within the servo casing, dependencies on specific servo types, and the implications of increasing voltage and current on system components.

kolleamm
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I'm thinking of ways I could increase the torque on my servo motors without changing the overall size too much. So far the only idea that comes to mind is replacing the small motor that drives it with a slightly bigger motor that has more windings, would that help?
 
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kolleamm said:
So far the only idea that comes to mind is replacing the small motor that drives it with a slightly bigger motor that has more windings, would that help?
Voltage and RPM determine number of turns needed.
Torque is proportional to current * turns.
For the same voltage and RPM, you keep the same number of turns, but for more torque you need more current, so you simply need thicker wires to carry the extra current.

Alternatively, change the gear ratio, reduce the speed to increase the torque.
 
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What kind of servo?
What application?
 
Lnewqban said:
What kind of servo?
What application?
Its for a robotic arm(uses standard sized servos). I just want to see how I could get it to lift more.
 
kolleamm said:
Its for a robotic arm(uses standard sized servos). I just want to see how I could get it to lift more.
You may not find enough room inside the case of a standard size servo for a bigger motor.
If the speed of lift can be decreased, the force of it could be increased via external mechanism with increased mechanical advantage.
Another way could be increasing the supplied voltage, if 4.8 volts is used now.
Consider that the wires and controller would be standing higher values of current in that case.
 

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