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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High speed, high precision motors for a Spherical Parallel Manipulator
As the title says, I am looking for motors suitable for my Spherical Parallel Manipulator.
The Spherical Parallel Manipulator will have a camera (likely a DLSR) mounted to it. The motors need to be ...
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Powering 3 MG996R servos
I'm building a robotic arm with 3 MG996R servos using Arduino Uno R3 board. I'm using this 16 channel servo motor driver for the project. I'd like to use an AC-DC adapter to power the servos. Is that ...
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How to calculate operating torque and holding torque of a slew drive for a manipulator arm?
Hope you are doing good and enjoying your weekend.
I have a question regarding calculation of torque and tilting moment for a slew drive. Slew drive (motorised) will be used at the base of a ...
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MG995 not working under 3A and 6.96V
I'm trying to work with this type of servomotors, I've been having a hard time trying to supply the required current to it, these are the things that I've tried:
First, I tried creating my own power ...
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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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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 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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How to avoid oscillations caused by backlash in position control?
I am working with a ball screw mechanism driven by a brushless dc motor with an encoder mounted on the load side. We are using a PID position controller with tuning settings by optimization however ...
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What is the best way to power a large number (27) servos at 5 V?
I apologize if this question may sound a little vague. I am working on a robotics project that will contain 27 servos of various sizes and I am having trouble figuring out how they should be powered.
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Coordinating long-running actions with independent threads [closed]
Basically, some things have real-world durations that need to be accommodated. For example, moving a servo arm 180° will take a significant number of milliseconds.
What is the best practice for ...
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How to control the position of a load shared between two (servo)motors?
I want to position-control an axis combining the action of two DC servomotors - one of them alone is not powerful enough; I had those available and preferred not to buy a new one.
I have not the ...
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Robotic arm simulation in MikroC
I am supposed to control a robotic arm with a servo motor. The angle of rotation of the servo motor depends on the voltage of a potentiometer.
A0 can read analog inputs and C2 can hold a PWM signal.
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How can such a small motor produce so much torque?
I have only recently gotten into robotics - so I'm not that familiar - please excuse me if this is a silly question.
I was looking at servo and stepper motors. I can see that a lot of servo motors ...
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How to control a servo using ROS2 and MICRO-ROS
I am currently using a raspberry pi pico and a raspberry pi 4, So far I have established a connection between the two using micro-ros-agent I have also successfully built and ran the example provided ...
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What is the type of electric motor that can lift 1.6 kg just like micro servos, but without the reduction gear?
Micro servo motors, normally the 9g type can lift 1,6kg with a reduction box made of nylon.
However, I'm interested on lifting this amount of weight (1,6 kg) in a faster rate in the axis of rotation (...
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Floppy fish mechanism design
I've bought a floppy fish toy (crab version) for my kid. The toy looks like:
Unfortunately, the toy mechanism inside jams when grabbed and the battery lasts for a short time:
I tried to do my own ...
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What type of actuators are needed for a high accuracy, low load weight robotic arm?
I am trying to build a robotic arm that needs to lift a very low amount of weight (between 0.01-0.05kg) at a time, but it needs to be very precise (+/- 1mm accuracy ideally). The robot really only ...
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How to Implement a Physically Human-Controlled Robotic Arm?
I'm a complete beginner in robotics other than FIRST competitions at my school. I wanted to make a robotic arm that works by a person physically moving the end-effector in 3D space and the robot ...
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What type of motor (size, type, approx cost) would be best to use to open a bedroom window
I noticed a tag showed up that indicates a servomotor. This looks like what I want. My new question is what size of a servomotor do I need to move a window that is approx 3 feet by 2 ft 8 inches....
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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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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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What kind of motors do industrial robot have?
What kind of motors do industrial robots use and how do you control them?
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How does a biped humanoid robot like OttoDIY move?
How does a biped humanoid robot like OttoDIY moves? What is the sequence of foot & legs servos? Can make it move forward, by lifting one foot up and turning leg, and then repeating the same steps ...
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Reducing stress on servo axle
I am designing an articulated robot arm that will not need to hold essentially any weight at its end, but that will need to perform thousands of repetitions (currently using MG 996R servos, but might ...
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How does the "rated torque" for a gear relate to the maximum torque?
I have just sized the DC motors I want to use (corresponding to my robot and its intended applications - my figures include a 50% uncertainty factor to account for friction in reducers and other ...
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How to add precise amounts of ingredients in my beverage making robot? [closed]
I am currently in the process of making a robot that can make a cup of tea, when It receives the command to do so. The general idea is as follows:
checks if saucepan is placed
checks if milk is ...
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Finding torque equation for my robotic arm
I am designing a 5 dof robotic arm, and for that I would like to find a torque equation. However, I am a little confused here:
According to me the torque equation for M1 should be l2m2+l3m3+l4m4+l5m5 (...
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Selecting a gear reduction: torque vs speed
I have just sized the DC motors I want to use (corresponding to my robot and its intended applications - my figures include a 50% uncertainty factor to account for friction in reducers and other ...
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HW limit servo motor range
I use MG90S servos(180 degree) for my robotic applications. In few places, all I need is a 30 to 90 degree range of the motor. The motors use a 5K pot for control. Can I change this pot to have ...
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stepper or servo torque in one direction only
What I want to achieve is this. I have a rod, which I want to move only in the direction of its axis, but move it (ideally) without resistance, meaning that If i pull the rod, I want it to follow (...
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Controlling digital servos
Many websites say that analog servo motors work on 50Hz and digital servo motors work on 300Hz. My question is, does this difference apply only to the inner control loop of the servo or does the user ...
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Servo Starts Oscillating Under Disturbance
I'm using MG996R servos to control a 6-axis desktop robot arm. When no disturbance (like a gentle push to the robot), the servos are fine and can hold their places. But under a gentle disturbance, ...
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MG996R issues with Arduino
I am working on a robot dog, and using 12 MG996R servos. I am powering the servos via a 2S LiPo battery, and I have the battery's negative tied to the Arduino's ground to prevent ground loop issues.
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How to choose a servo motor for solar tracking mechanism?
I design a solar tracking mechanisim. You can see the very undetailed representation in the pic. For choosing a servo motor how can I calculate the torque etc?
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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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Servo horn dimensions - What is 25T?
I wonder that horns for servos are marked in some T units. Example: 25T
Please help me getting out, what does it mean.
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I need to make something that can slam something into something else really fast in both directions
I'm fairly new to robotics, but I have this idea for a machine. I've done a bit of research but can't find exactly what I'm looking for. I need something that can either move back and forth at at ...
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How to attach plate to stepper motor?
Total noob here (never touched Arduino before today), & have pretty much no hands-on technical experience (although with lack of experience, I make up in enthusiasm to learn!)
Question: How do you ...
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Given this old pin diagram and numbers on this old encoder, what would be a suitable modern encoder to use?
My place of work has recently acquired a Hydraulic Press Break from the 80's. It has a CNC controlled back stop which is driven by a DC motor and Screw drive. The encoder which couples to the motor ...
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Servos jittering problem
So I started building this 3D printed Bluetooth robotic arm that can be controlled via MIT app inventor from HowToMechatronics.com. After connecting all the servos and running the code, the servos ...
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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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How to extract the servo motors of a Digital Micromirror Device?
The good news is, that modern DLP projectors are sold for a low price. Each of the projectors is equipped with a so called digital micromirror device, which is an MEMS array. It contains millions of ...
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Power pack and servo driver for robotic arm?
I have a robotic arm that uses about eight 7.4 volt volt high torque servos. (https://www.servocity.com/2000-series-dual-mode-servo-25-2/)
I need to know what Kind of battery system I can use to power ...
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I've got a few servo motor questions
How can I measure the amount of voltage I'm giving a servo motor? How can I give a servo motor the correct amount of power it needs to run at it's full potential? Say I had this motor:
ANNIMOS 60KG ...
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Servo motor vibration problem
I'm working on DIY robotic arm. Robotic arm has 5 servos. The problem is that servo motors are shaking. I found different solutions but none of them works. What happens is that when I connect one PWM ...
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What should be my spray handle-servo interface for pull mechanism? [closed]
I am an electronics engineering student who recently started working on Arduino. As part of my efforts to wake up on time, I decided that I should make an automatic water spray alarm clock. I have all ...
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Do hobby servos respond to step inputs with a step in torque?
I'm designing a piston that I need to expand a few cm in <100ms to load energy into a spring-mass system with around a pound of force (as shown below). Based on power specs alone, high-end hobby ...
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How Can I Measure the torque applied by a servo motor?
I believe that there must be a tool that can measure $oz-in$ of torque. I do not trust what the servo manufacturers state on their site for torque values, so I want to test them for myself.
Can ...
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Smart Servo Motor Type Comparison
I have been using the standard MG90/SG90 servo motors for years now and am familiar with them. Recently, I am trying to build a robot dog with them with no success. The motors keep on vibrating and ...
