Questions tagged [servomotor]
A servomotor is a closed-loop servomechanism, typically used in industrial applications. It usually consists of a motor coupled to a sensor (e.g. encoder) for precision position feedback, typically using a low ratio gearbox or direct drive.
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Servo motor torque
I am confused with the torque ratings of servo motors, or I guess it is general while choosing any motor.
For example a servo's torque is rated as 10kg-cm, so does that mean it can handle a 100N ...
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360 Continuous Rotation Servo only goes 180 degrees
I bought the following servo: D DOLITY High Speed 360 Degree Continuous Rotation Servo for Robotic(15kg/cm) Metal Gears Servo
I'm trying to get it to spin in one direction continuously, but it looks ...
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Relation between PWM frequency and torque
I am using Pololu G2 18v15 to drive a maxon motor. The motor is supposed to drive a load in a sinusoidal trajectory against gravity with maximum torque of 0.0634 NM with max speed of 5 rpm.
I am using ...
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Encoder attached to output of gearbox of stepper motor
I'm building a SCARA robot controlled with stepper motors and want to use an encoder to close the loop. The main reason for this is I am using an experimental gearbox with nonlinearities and zero ...
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How should I power my servo motor with the Adafruit PCA9685 chip?
So I have an Adafruit pca9685 controlling an HSB-9380TH servo and a MG-996R servo. I recently began learning about building robot so I apologize if these questions seem dumb. I literally spent a days ...
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Pwm settings of a Sg90 servo motor
I use a TowerPro sg90.
1.5 ms for the centre position 0 degree, and 2 ms pulse for +90 degree and -90 degree with a 1ms pulse.
But it's definitely not looking like it goes for 90 degree or -90 ...
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Motor controller for two Hitec D845WP servos
I am undertaking a project using two Hitec D845WP servos running at 8.4 V.
Hitec's website lists idle current of 30 mA, no load operating of 1600 mA, stall current of 10 A and ...
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3 arm robotic claw
I am attempting to design a 3 prong robotic claw for a robotic arm I am working on. I am planning to use sg90 servo motors, but I can't get my current design to work. My current layout is to use one ...
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18 MG996R servo motors control and power
I am currently working an a personal hexapod robot project. I am building it using 18 MG996R 4.8 to 7.2 V servo motors. I would like to use a Raspberry Pi 3 B+ to control it. I purchased a 7.4&...
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What servos are suitable for a robot like Boston Dynamics’ Atlas?
I have seen Boston Dynamics’ robot Atlas do some pretty impressive things, like a backflip, which must put quite large torques on the servomotors.
What servos are there that can generate torques like ...
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Best way to estimate velocity of motor with encoder
I'm designing a PMSM controller with the motor has an optical encoder, so I can get position information from the motor. But how to measure the velocity of the motor. Now, my design is to calculate ...
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The Arduino Turns Off After Attaching A Servo Motor
The Arduino turns off when I try to put the wire from the servo to its respective pin (9). Also, I've tried the code from the Arduino IDE, the knob code where the position of the motor depends on the ...
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Ultra Low Power servo and controller for long usage..? [closed]
So I have an idea which would require the following:
1-4 servos
1 microcontroller
some way of communicating with it via smartphone (bluetooth or wifi)
Ability to run for 14 days on a small power ...
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Is it possible to calculate the gear reduction based on datasheet of SG90?
is it possible to calculate gear reduction based on the datasheet of SG90 servo motor? Because I wanted to do some modeling in Simulink and RC servo ask for gear reduction, but I can't find any ...
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Motorised Stage for laser
The problem
I want to be able to move the direction a laser is pointing.
This means I need to have motorised rotation of the laser head in the x direction and in the y direction. I am unsure of the ...
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Can I run a servo with lower voltage?
I bought two servos (HS-5685MH) for a pan-tilt-unit and somehow didn't see that they require 6.0 to 7.4 Volts which I don't have in my current setup. I have a 5V source that could provide the power, ...
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How can I measure the torque a servo motor is applying very precisely?
Is there any cheap way to measure how hard a servo is turning?
I am looking to measure changes of about 0.1 oz-in.
What are the common ways to measure servo torque, how much do they cost, and how ...
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are mg996r servo failures common?
I am new to the small servo area.
I bought a eBay 6DOF Robotic Arm, and 12 mg996r servos to go with it.
Using an arduino and I2C PCA9685 16 X PWM board, with the example code from adafruit, I set up ...
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How to transfer motion between these two parts?
I'm trying to model this arm and I'm having a problem knowing what way could I use to make the red part always parallel to the surface of the table
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Increasing Torque by either doubling servos or building a gear box
I'm looking here for suggestions.
I have a HS-805BB with Torque (Kg-cm/Oz-in): 24.7/343 @ 6.0 V to rotate a robot body up and down from one side. It seems to me that this servo is always running at ...
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How to control the speed of servo?
I am using FPGA board and servo, I read that with PWM I can control where the servo will rotate. If the duty cycle in PWM is 1.5 ms it goes to the center, if it is 2 ms it goes to clockwise and if it ...
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DC servo motor shake/vibrate too much
I have a servo motor (details are here). I wrote a code in Arduino to rotate it in some defined angles and position. Code is given below:
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Position Sensor
During my design of a simple robotic arm, where I 3D printed most of the parts, then used these HS-422 servos, it turned out that for a better control precision and to be able to apply Inverse ...
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DC geared Motor 20 NM 25 RPM small dimensions. [closed]
My application requires a DC geared motor with torque of 10 NM - 20 NM and low speed (25 RPM at most) and a small dimensions (120 mm length at most).
I failed to find my specs at eBay, and Alibaba ...
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Kollmorgen S300 drive oscillation
Robotics! We've got a rotation device controlled with Kollmorgen S300 servodrive. The official support is silent as Jesus, so I've decided to ask here instead.
When it is given a task to set into a ...
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How do I choose the stepper motor torque for my robotic arm
I'm a communication engineer so my knowledge about robotics is very little.
I know the basic formula of torque T=mgL
in my project I have 2 arms & 2 motors
i used a torque calculator online ...
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Robotic arm select servo motors
Hi i´m designing a robotic arm based on this idea of the NOVABOT I only want to change its structural parts by aluminum tubes. In this design 3D model it use the servo hs-311 wish have a max torque of ...
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cable-controlled flexion and extension
I'm new, please be gentle :-)
I'd like to control the position of a single-axis joint using one cable for flexion and another for extension.
In many of the anthropomorphic designs I've seen each of ...
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Industrial servo motor
How to control an industrial servo motor?
The specific motor dive I am looking at is a Delta adsa-a2 series AC Servo Drive.
I know that we can connect the motor driver to the software that the ...
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High Res Rotary Encoders [closed]
As part of a project I need an encoder to determine the angle that this, Continuous Rotation Servo - FeeTech FS5103R, has rotated through. The resolution needs to be fairly high as I will be using it ...
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Driving Rhino DC servo motor using Arduino through commands sending from MATLAB
I have a servo motor (http://robokits.download/documentation/RMCS220x_DCServo_Driver.pdf). I wrote a code in Arduino to rotate it in some defined angles and position. Code is given below:
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Rotate DC servo motor with ARDUINO
I have this servo motor (http://robokits.co.in/motors/high-torque-encoder-dc-servo-motor-60rpm-with-uart-i2c-ppm-drive?gclid=CLHf9_fCqNQCFVAeaAodhM0Ddg&). Generally, I have seen servo motor with ...
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Connecting two servo motors to drive one shaft [closed]
I need to connect two servo motors (with internal position control) to rotate one shaft (to control its position), is that possible? and how to avoid synchronization problems?
the servo motor
I am ...
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How to remove sound comming from servo motor?
When ever i move the servo motors from the arduino, it produces sound. I don't want the servos to make this sound. How can i remove this sound. As i think this sound must be coming from the gears used ...
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How to program a continuous servo motor? (Arduino)
I need to use continuously rotating servo for a camera stabilization system. My professor bought servos that have already been modified for continuous motion--there's no stop in the gears, and the ...
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Why are some motor shafts stiff while others spin freely when not powered?
Most servos and steppers I've worked with are able to spin manually when no power is applied, but I've come across a couple which are stuck in their position. I'm not sure if they are just very ...
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Mounting on servo horn
I'm trying to mount a rod on a micro servo's horn. The horn has several 1mm wide through holes. Does anyone know what sort of (tapping?) screws should be used for tapping 1mm plastic holes? Are M1.2 ...
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How do you make a device that can pick up nerve signals? [closed]
I am trying to make a robotic arm that mimics the movement of the user's arm, They way I need it to work is to detect nerve signals and send them to an arduino. The arduino would then have a servo ...
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Can an arduino control a large servo motor?
A I wanting to build a robotic hand, a big one at that. Similar to this one but in a much larger scale:
http://www.instructables.com/id/DIY-Robotic-Hand-Controlled-by-a-Glove-and-Arduino/
Does it ...
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Is the working principle of all servo motors the same?
If I can control a small hobby servo motor then can I control high torque servo motor in same way? I want to make a robot which needs a high torque and speed motors. But first before buying some ...
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1 motor and 180 degree servo or just 2 motors?
I am planning to use this motor: http://www.adrirobot.it/robot_kit/feetech_FT-DC-002/TGP01D-A130_TT-Motor.pdf Model: TGP01DA130 12215-48.
But I have some questions: How much a robot will be slower if ...
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Which motors are used in boston spot robot
I want to know which motors or smart servos are used in boston dynamics spot robot. Where can i read its spicification and is it possible to buy the motor?
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What exactly does a motor driver do? Why do we need an additional power supply for motors?
What exactly does a motor driver do? Why do we need an additional power supply for motors? I'm a hobbyist and making a line follower from scratch.
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How to calculate battery size for servo motors?
I am making a robotic device with the following servo motors.
How do I go about calculating the battery capacity?
It is supposed to run for 10 minutes.
I am bit confused as to use the no-load current ...
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Fetching encoder value with SimpleMotion library by Granite Devices
Is it possible to fetch the current encoder position of a drive with the old SimpleMotion library (not V2) and a Granite Devices VSD-E through the smRawCommand(...) ...
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Problems connecting to the Granite Devices USB6AX motion controller
I am working on a setup from 2008 with a 6 axis USB motion controller and 4 vsd-e drives very similar to the setup shown here.
The motion controller board is exactly the same as in the first post of ...
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How to use registration inputs on a Kinetix servo?
I am working with a Kinetix 5500 servo drive with a rotational actuator to locate a keyway on a shaft. The shaft will rotate, and a laser sensor will detect the height difference when the keyway ...
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Calculating screw breakaway torque
I'm trying to use motor-sizing tool developed by oriental motor to choose good servo motor for my cnc
The tool requires breakaway torque of my screw as input, I searched online but I got people ...
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How to power this servomotor?
I would like to use and test this type of servo motor, significantly stronger than the ones I've been using previously.
However the datasheets seem to be limited and I can't exactly tell how to use ...
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how to manipulate arm robot? [closed]
I want to make a robot arm with a gripper that can go to any x y z coordinates near it. the robot itself will be simple just servo motors and Arduino but I don't know how to make reach the desired ...
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