Measure the torque of a servo motor

In summary, the conversation discusses the process of calculating torque for a servo motor by lifting a load at a known angular velocity. It is mentioned that the torque can be calculated by multiplying the force with the radius, with the reminder that force is measured in Newtons and weight in kilograms. The conversation also mentions that during the acceleration period, the force is equal to the weight plus the mass times acceleration. It is noted that most servo motor drives can report the actual torque, typically as a percentage of the rated continuous torque. The conversation also clarifies the difference between a servo motor and a stepping motor, and mentions that closing the loop on a stepping motor can turn it into a servo motor.
  • #1
LeoYorkshire
1
0
I have a servo motor which rotates 180 degrees. I want to calculate torque of the motor. To calculate the torque I'm thinking of lifting a load of a known value, with a known angular velocity. But I am struggling to find/calculate the torque based on these values. Does anyone know how to do this based on these known values?
241982
 
Physics news on Phys.org
  • #2
If you are lifting the load at constant velocity, the torque is the force times the radius. Remember that force is in Newtons and your weight is in kilograms.

In order to start the load moving, the load is accelerated. During the period of acceleration, the force is the weight of the mass plus mass times acceleration (F = ma).

Most servo motor drives can tell you the actual torque. They typically report torque as a percentage of the rated continuous torque. Most servo motors can deliver 3 or 4 times continuous torque for a short period of time. If the drive reports 250% torque, that is what is happening.

The motor is the motor, and the drive is the electronic box that sends power to the motor. There should be a data sheet that tells you the motor specifications, and also the performance of that motor with that drive.

If it is a stepping motor, it is not a servo motor. And servo motors are not stepping motors.
 
  • #3
if you close the loop on a stepping motor, it becomes a servo motor. ;)
 

1. What is torque and why is it important to measure in a servo motor?

Torque is a measure of the rotational force of a servo motor. It is important to measure torque because it determines the motor's ability to move and control a load, and can help ensure the motor is functioning properly.

2. How do you measure the torque of a servo motor?

The torque of a servo motor can be measured using a torque sensor or torque meter. This device is attached to the motor's output shaft and measures the amount of force being applied to it.

3. What units are used to measure torque in a servo motor?

Torque is typically measured in Newton-meters (Nm) or inch-pounds (in-lb) for servo motors. These units represent the amount of force being applied to the motor's output shaft in either the metric or imperial system.

4. What factors can affect the torque measurement of a servo motor?

The torque measurement of a servo motor can be affected by various factors such as the motor's speed, load, and power supply. Additionally, any external forces or friction on the motor's output shaft can also impact the torque measurement.

5. How can the torque measurement of a servo motor be used in practical applications?

The torque measurement of a servo motor can be used in various practical applications, such as robotics, automation, and industrial machinery. It can help in determining the motor's performance, detecting any malfunctions, and optimizing its use in different systems.

Similar threads

B How to Calculate Power and Torque for a 15kg Load at 15 RPM?
    • Mechanics
Replies
7
Views
1K
I PIGA: Pendulous Integrating Gyroscopic Accelerometer
    • Mechanics
Replies
0
Views
520
B Non-physicist needs your help torquing a nut!
    • Mechanics
Replies
9
Views
266
Reaction torque in a traction system
    • Mechanics
Replies
10
Views
1K
Increasing the output torque of a DC motor with gears
    • Mechanics
Replies
16
Views
2K
Electric motor torque control based on speed interaction/instability
    • Electrical Engineering
Replies
3
Views
860
Can increasing voltage or changing the motor size help maximize servo torque?
    • General Engineering
Replies
4
Views
2K
I Transmission of torque using friction
    • Mechanics
Replies
32
Views
819
How to calculate required torque for a robot arm
    • Mechanical Engineering
Replies
2
Views
2K
Calculation of torque, momentum
    • Mechanics
Replies
5
Views
1K

Hot Threads

Recent Insights

Back
Top