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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Screen Coordinates [ x, y ] to Pan and Tilt angles

So I have a pan-tilt system with an airbrush on top, the pressure is quite strong so that I can place the robot at a distance of at least 1.5 meters. I currently have normalized coordinates XY that I ...
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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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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 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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How to program a custom microcontroller to USE CUES FROM A PC to change the position of a servo motor? (Without using Arduino/Raspberry Pi)

I want to program a custom microcontroller that ideally connects to a camera and performs some sort of image analysis and do something(like change the position of a servo motor). The initial idea is ...
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Belts vs gears; which is more precise?

I'm working on a robotic telescope pointing mechanism, driven by a pair of servomotors. I'll need a very high angular precision - on the order of 1 second of arc (0.0002778 degrees). Obviously, then, ...
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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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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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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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Detailed resources for control of linear actuators including backlash/friction compansation and controller design?

I am working on a project where I would like to control a linear actuator with a ball screw mechanism. I feel I need a reference book for position/servo control systems for dc motors as there are many ...
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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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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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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 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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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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Tractive torque calculations for rack & pinion drive vertical lifting

What all factors should be considered to find out the required torque to lift 60kg load body vertically with 4 pinions engaging on rack without any other supports. How much factor of safety should be ...
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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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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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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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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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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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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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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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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 ...
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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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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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Make servo's shaft longer [closed]

I’ve got a few servo motors MG995, MG996R, etc. For my make I need a servo to have a longer shaft – 6cm or so. I cannot find a way to achieve it. There is lots of Shaft Coupler for steppers and DC ...
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Does the Grbl have S-curve or harmonic velocity profiles?

I'm working on a machine and the position has a high impact by the jerk and acceleration of the machine. I'm using Grbl for my machine. Does Grbl has S-curve or Harmonic velocity profiles?
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Controlling Integrated Servo motors with PLC for 5 DOFIndustrial Robotic arm

I am working on developing a 5 DOF robotic arm having 50 kg Payload using PLC, we are willing to source the integrated servo all in one (servo drives, encoder, and servo motor) with no breaks and ...
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How to convert torque in oz-in into the weight it can withstand?

I am looking at servos to make a robot claw, and I want to make sure the one i am getting can turn under a specific amount of weight. The servos specify their torque in oz-in. I am not sure how to ...
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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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What should be the required operating voltage for Servo motors in my 5 DOF robotic arm, with 50 kg payload

These are the estimated torque values of all axis in our applications 1st Axis- 226.57 oz-in - 478oz-in 2nd Axis- 756 oz-in -1590oz-in 3rd Axis- 356 oz-in - 749.7 oz-in 4th Axis- 188 oz-in - 395 oz-...
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Controlling high torque servo motors with Raspberry Pi

I need to control 10 Standard Servo Motors (operating at 4.8-7V/300mA-1A/2.5kg-5kg torque) in my project. I'm using RPi as my processor and I was looking for a servo driver. I came across PCA9685 16-...
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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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Measuring a Motor's Internal Temperature

As a final safety measure regarding some high wattage motors, I want to measure their temperature (either internal or surface) in live time so that I can automatically kill the power if it crosses a ...
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Control a servo (two position 180-degree swing) with an On/Off switch without microcontrollers [closed]

For my application, I need to be able to control a servo with a simple on/off switch. When it's off (pulled LOW), I need to servo to go at -90 degrees and stay there - possibly for a prolonged time. ...
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What is the difference between the holding torque and stall torque of a motor?

Do the terms holding torque and stall torque imply the same thing? The information on torque for these stepper motors is given as holding torque. While these servo motors have the torque given as ...
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How is this torque value arrived?

I'm going through this person's torque calculation of a simple crane setup. the servo used has a max torque of 57oz.in: At the top, if Mservo is 34.12oz.in, how is ...
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Rotating a lever with a small servo

I'm trying to rotate a lever link to gently "offload" a load using a servo. Here's a drawing: Here, the red is a lever, yellow pivot and black is the load. To offload, the lever needs to be turned 90 ...
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I wanna make a raspberry pi car using an RC car. I would like to know if the servo multiplexer is necessary?

So I'm working on a project and it involves making a raspberry pi car, be it from scratch or with the help of can rc car. I chose the latter. Now the problem is I don't really have servo multiplexers ...
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Serial command receiving failure with Arduino and Adafruit shield from C# desktop application

For a long time I use Arduino Uno controller and Adafruit Servo Shield with 6.3V 1000 uF capacitor, powered with 6V 8Amp adapter to control 8 digital servo motors ...
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Sizing servos for robotic arms

I am designing a robotic manipulator. The basic design is shown below. I am trying to calculate the torques around each joint to choose servo motors. I have made an attempt to find the torque around ...
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How to calculate the right needed Power?

Me and my team are building a robot and I need to calculate the Power of the motors. Through my research I found that I must know the needed torque for every motor and then convert it to electrical ...
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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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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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