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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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44 views

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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21 views

Which motor(as cheap as possible) and of how much torque should i use in my robotic arm of 5 dof to lift 1kg weight and throw it 2metres of distance?

This is the cad(solidworks) model i chose and it has 5 degrees of freedom and need to lift 700 grams object and throw it at a distance of 2metres. I want to know the motors which are suitable for it ...
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33 views

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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12 views

Torque calculation for differential drive AGV for turning about pivot position

I am building an AGV to carry a payload of 60 Kg and AGV weight is 60 kg. Currently I am using 60 kg-cm torque stepper motor (1.6 A 12 V) on each wheel of a 4 wheel drive ...
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1answer
26 views

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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1answer
64 views

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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2answers
51 views

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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1answer
26 views

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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1answer
21 views

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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1answer
19 views

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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14 views

Dynamixel AX12A servos stops working after a few seconds

I am trying to sweep a dynamixel servo using arduino uno and servo shield. It works for a few seconds and then stops with LED blinking. Resetting the power fixes it but that is not the solution. ...
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21 views

Separation of motors from movement

I have a large 1m diameter metal sphere. It has a fixed hollow rod drilled through the bottom of the sphere side and reaches to the middle of the sphere. I wish to move something in a x and y ...
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1answer
23 views

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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1answer
36 views

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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23 views

Motor solution for being able to precisely detect location of changes in torque

I am looking to make a robot with a motor that can: a) Rotate to an arbitrary position very precisely (accurate to about 1/1000 of a rotation) b) Detect small changes in the torque of what it is ...
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2answers
60 views

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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1answer
40 views

are mg996r servo failures common?

I am new the 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 ...
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37 views

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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7 views

Controlling Position of BM-5485HB-400 Servo Gearbox with Arduino

Using BM-5485HB-400 Servo Gearbox from Servo City with Arduino. This Servo should have a range of 0-400 degrees. I am using the Servo arduino library and it is continually going in one direction, ...
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1answer
30 views

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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0answers
14 views

Choosing motor for shake/push pull action?

I'm looking forward to choose motor for shake or fast push/pull action. On this video you can see example motion on 3:04. I read linear motor does that but looks like much slower. What kind of motor ...
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2answers
32 views

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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1answer
110 views

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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0answers
9 views

Where to find servomotors gears datasheet to model custom horm

I need to create 3D model for a custom horn form a different servomotors, but I can´t find the datasheet of the output gear to be coupled with my design. I´m also seeking the horns models of each ...
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97 views

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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2answers
264 views

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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1answer
21 views

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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0answers
224 views

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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2answers
1k views

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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1answer
47 views

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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1answer
117 views

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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1answer
282 views

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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1answer
232 views

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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1answer
328 views

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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1answer
128 views

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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1answer
127 views

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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4answers
5k views

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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1answer
219 views

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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2answers
382 views

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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1answer
277 views

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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1answer
340 views

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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2answers
225 views

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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1answer
82 views

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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1answer
363 views

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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3answers
69 views

What exactly does a motor driver do ? Why do we need additional power supply for motors

What exactly does a motor driver do ? Why do we need additional power supply for motors. I'm a hobbyist. making a line follower from scratch.
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2answers
380 views

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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1answer
75 views

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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1answer
71 views

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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1answer
1k views

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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1answer
1k views

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 ...