Questions tagged [motor]
Without qualification 'motor' is usually taken to mean a rotary electromechanical motor, typically either a brushed or brushless design.
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ROS2 Controller to send torques
I have been working on a self balancing robot and would really appreciate some help,
I would like to know how to send torques to motors with ros2 control, I'm using dynamixel x motors.
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Rotot hardware - batteries considerations
[please dont downvote, just let me know what infos are missing]
I built my second robot and I always end up with the same issue ...
The CPU board always resets when a high rush of current is demanded ...
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My obstacle avoiding car doesn't work with dry cells
Ok, I am not a genius in such projects but, it is the first project I am doing in robotics.
The problem is that the wheels of the car doesn't continuously tend to rotate when I power the motor driver ...
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Gazebo SDF file, Defining Motor & Prop parameters like MaxRotVel, RotorDragCoefficient etc
I am new to Gazebo SDF file generation and I am facing problems in defining motor parameters. Can anyone give an understanding (also where to get it). Iris is an example which is already there as a ...
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Controlling motion of single link
This seems like it should have been a well studied problem, but I can't find any solution.
We want to define what a motor must be commanded to do to move a single link with mass $m$ and length $l$ $...
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Accuracy of PTZ with Permanent Magnet Synchronous Motor (PMSM)
For my project I need a pan-tilt system able to provide 0.1° resolution or better.
I do have my own solution based on stepper motors with planetary gear for low backlash and 0.05°.
However, I designed ...
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How to implement self-locking motor in Gazebo/SDF?
I have a model with a few joints controlled by self-locking motors. The joints can be prismatic or revolute, but the real robot has a very high gear ratio in the motors, so the joints are basically ...
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How to access devices in webot robot?
I have trouble finding out what devices are in my robot currently I am using e-puck but I want to use a robot such as the Tesla car. I want to know what devices I can control. Example if e-puck has 2 ...
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scan -> nav -> motors?
I built a 2 wheels robot, and I can control the wheels through GPIO on a RPI4 8gb
I can launch a couple of TF transformations, launch the lidar, navigation and the rviz the result by launching these ...
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How can I rotate a stepper motor northwards?
I am working on a project where I need to rotate a stepper motor North, South, East and West. To implement this, it seems like you just need to know where one direction is, say North. Given that, you ...
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Difficulty with tuning motor PID controller [closed]
I am struggling for a while now with tuning PID control on my motors. I have bought different motor driver boards better motors etc but still I am unable to get a good control on the motors.
What I am ...
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How to calculate the required torque of motor for bipedal robot
I just create a bipedal robot in SolidWorks and after I got all components, I realise that I need select the correct motor for the robot. There will be four motors equipped in the robot, two for hip ...
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Barrel with slot, that can slide
Image sourced from: Huygens optics YouTube channel : Maskless Wafer Stepper Part 2: Mechanics @ 7:40
I need to couple a stepper motor to a leadscrew that will be translating back and forth. One ...
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Will increasing voltage on brushless DC motor increase torque, if speed is kept constant?
I have a brushless DC motor that takes as input voltage 12-60V. If I want to drive the motor at a constant RPM, will increasing the voltage also increase the torque? For example, if I drive the motor ...
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How to design shafts and select bearings
I am trying to design robotic joints for a SCARA arm, I am mainly missing information about the shaft and bearings components.
Design would be similar to MakerArm / Dobot M1 kickstarter projects.
So ...
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Should I be using the old clutches with VEX 393 motors?
I am posting here because the "official" Vex forums don't seem to support EDR anymore :-( but anyhow...
I am teaching a class and we are using VEX parts to build a simple winch, the whole ...
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How to design a representative drive cycle based on speed, acceleration, and torque requirements?
I recently came across the topic of "drive cycle design". I would like to learn more about this as I delve into motor and RC vehicle design.
Given: the RC vehicle must achieve 25mph max/...
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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 find coefficient of friction that will maximize torque?
When using DC motors with a drive wheel (aka "direct drive") to propel a vehicle (e.g. an RC car), force and torque play a role in how efficiently that motor's power is transferred into ...
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How to maximize top speed potential for a given motor? [closed]
I have an engineering background however I am new to motors. I am looking to understand what the options exist for maximizing the top speed a motor can produce (say for an RC vehicle) without simply ...
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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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What DC motor is fit to replace this AC one?
I've a machine with this motor:
I would like to swap this one with a DC motor in order to have better control, maybe a stepper one so that it could be controlled via an arduino board and a dedicated ...
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Trajectory tracking for a robotic arm
I want a robotic arm to do trajectory tracking in the joint space. Suppose the waypoints are
$$
[t(0),q_1(0),q_2(0),q_3(0)],\\
\cdots,\\
[t(n-1),q_1(n-1),q_2(n-1),q_3(n-1)]
$$
I already know that I ...
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H bridge duty cycle vs maximum voltage
I've just burnt out an L298n H bridge, not surprising, but I thought it'd be ok for low load testing. Apparently not.
I'm considering ordering these to replace them - Hilitand DC 5-12V Motor ...
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Stabilizing water bucket with two retractable cables and motors
I am trying to design a system in which a bucket of water is held by two cables, lifted up/down while remaining stable. The cables can be retracted/detracted by two individual motors, controlled by ...
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Can you increase resolution/accuracy by mechanically averaging two actuators?
I'm working on a project using hobby servos to drive a revolute joint, and the servo mechanism doesn't seem to respond when I command a motion of less than about 1 degree. I want to increase the ...
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Impact of using PID Output as a Change (Delta) vs Absolute
I am trying to control speed of a motor using PID. It seems like I have two approaches.
Using PID to calculate the absolute duty cycle value of the PWM
Using PID to calculate the change needed in the ...
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What motor controller board is this?
I was watching a Mark Rober video in which he shows a prototype of his robot, does anyone know what the board in the attached screen-grab is?
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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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Sample code for L298N H bridge Arduino Motor Driver not working
I am quite new to robotics, arduinos, motors and that sort of thing so there is a very strong chance I am missing something very obvious. However, I have looked up multiple tutorials online, none ...
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Q: Motor sizing for reeling application
I would like to ask for some help.
My application is regulation of vertical speed of the camera, which is mounted on winding/unwinding reel. The camera follows the object (which moves vertically).
The ...
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Will using a 1:50 cycloidal drive on a 10,000 RPM brushless motor actually spin the output shaft at 200 RPM with 50x the torque of the motor?
In short, I'm trying to build a high-torque and high-RPM robotic arm, and I think brushless motors are the best compromise. The motors I'm considering are 400KV, and are supposed to run on 6S. Are ...
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Precision/Repeatability issue with XArm6
I have a robotic setup with a XArm6 robot and camera facing up with vision algorithms.
I noticed that after a collision or power glitch the robot gets offset. X, Y and Z and angle change according to ...
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From speed vector to motor control
I'm working with Mona robot (image bellow).
The movement is controlled by settings the speed of each wheel.
I'm trying to find a way to convert a speed vector into motor control so that the robot will ...
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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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The Optimal Reduction Ratio
Hello everybody. For my robot design, I would like to utilize the most optimal gear ratio that I can use. For that I want to utilize the torque of my motor which is a linear function of rpm. This task ...
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Efficient control for BLDC 3-phase motor with BEMF using Arduino (Atmega328pb)
Working on developing efficient code for driving a BLDC 3-phase motor with BEMF feedback using Atmega328pb,
The code is based (as a starting point) on this tutorial: Link
The basic understanding is to ...
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4-Wheeled Mobile Robot, Motor-Torque, RPM Calculation
I want the torque, rpm of every motor to be used considering certain factors, in a 4 wheeled robot as you see in the picture below.
Here are the factors affecting motor specifications that I Had ...
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How to calculate holding and operating torque at the base?
Could anyone please help me with the formula to calculate the operating torque and holding torque at the base to rotate the structure on top of it as shown in image with white arrows?
Thank you in ...
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Outer Position Loop to Control Inner Velocity Loop
I'm trying to control the position of a brushless DC gearmotor. To drive the motor, I have a controller box that provides a velocity that is proportional to a 0 to 5 V input. The motor has it's own ...
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How to measure an optical encoder resolution and gear ratio?
I've bought a DC geared motor with an optical encoder. The vendor didn't provide specification. I can read MITSUMI M25N-2R-14 2241 and 25GA-370-12V-330RPM on the motor. There are some pages on the ...
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How to drive a motor by Python
I need to drive any small motor (with small delay) by Python without low level programming. What hardware and software I need? Does "Robot Mesh Studio" fit for this? I want to make a robotic ...
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DC motor modelling with Bond Graph
I am trying to construct an equation that describes the output torque as a function of lambda and omega
I have obtained the following bond graph but I am unsure of how to proceed.
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Connect LiPo battery to Arduino Motor Driver Shield for RC Boat
Thanks for taking the time reading this question! It is greatly appreciated.
What are we doing
We (two complete noobs) are building a remote controlled boat from scratch using Arduino compatible ...
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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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Equations of motion in matrix form and energy consumption
I am working on Lagrangian derived high-dimensional motion equations for a robot in matrix form. The structure of such an equation is known:
$M(q)\ddot{q}+C(q,\dot{q})\dot{q}+G(q)=0$
In here, $M(q)$, $...
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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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Why use timing belt drives in Stepper Driven Robotic Arm
This may be a noob question. I am sorry if it is but I am new to this field. I am working on a design of SCARA Robot and I am using Stepper Motors to drive it. In many youtube videos, I have seen that ...
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Find viscous friction for DC motor transfer function
How do I find the viscous friction for my DC motor without measuring the input current and output torque.
I have to do a theoretical model on simulink and can't find any answers on how to find it
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gear motor with encoder and Arduino Uno
I'm working on a project where using a gear motor with an encoder and an Arduino Uno. I have not done Arduino in a long time and am struggling getting it to do what I want. If you look at the wiring ...
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