Questions tagged [motor]

Without qualification 'motor' is usually taken to mean a rotary electromechanical motor, typically either a brushed or brushless design.

40 questions with no upvoted or accepted answers
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Robot - Wall Avoiding (Plinko Robot)

I am looking to build a robot that will travel and zig-zag down the hallway.It will be headed towards a wall at roughly 45 degrees and then use a IR LED to detect when a wall is nearby. From there, ...
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0answers
49 views

How to calculate what motor I need to move weight

I'm working on a project trying to make some electric roller curtains. I can use 2 motors on this curtain, on each side to lift and pull down the curtain. Pulling down the curtain requires not as much ...
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1answer
73 views

Can't run DC Motor with Arduino and Adafruit Motor Shield

I'm very new with Arduino and Adafruit and I'm trying to get a DC motor running with my Adafruit Motor Shield V2.3, but it's not running. I have connected the motor to the right terminal (M3). I'm ...
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4answers
1k views

Quadcopter motors vibration problem

I built an Arduino Due based quadcopter, with MPU-6050 for auto levelling and BMP-085 for Altitude. I am using Kalman filter code from here for the MPU-6050 to take the Roll and Pitch angels from the ...
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2answers
28 views

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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1answer
25 views

Voltage not registering when motor is connected?

I'm trying to fix my kid's power wheel. When you press the gas pedal, nothing happens. I took it apart and checked everything. I noticed that when I disconnect the wires from the motor and check them ...
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0answers
43 views

Determining required torque for DC motor

How to determine the required torque while choosing a DC motor? Here is a simple scenario. Think of a 4WD or 2WD vehicle. The max load the vehicle will have is 100kg. Q1. How do I determine the ...
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0answers
26 views

Gimbal motor shaft

Does anyone know if a shaft can be pressed into a gimbal motor like this? Is the centre metal ring just the inner race of a ball bearing? The ring looks thicker on one side but thinner on another ...
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0answers
35 views

Robot dynamic control

This can be a basic question but according to my knowledge I don’t know answer. We can use control system theories to control the position of motor. Considering two motor joint leg it can model and ...
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0answers
39 views

Are rotary encoders necessary for holonomic mecanum drive?

I'm making a robot which is going to have a holonomic mecanum drive. The doubt that I'm having is that should I use rotary encoders for doing so. The bot will be manually controlled so would it be ...
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0answers
27 views

How to use thrust bearing with shaft?

I know how to use radial bearings, e.g. ball bearings with shaft. But no matter how much I googled I didn't find any proper clear way to use thrust/axial bearing with shaft. I downloaded the thrust ...
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0answers
203 views

Kinect V2 (Arm/Hand Reading) to G-Code

I am very new to this space and would greatly appreciate some clear guidance. I have a Raspberry Pi 3, Arduino Mega 2560+Shield, and Kinect v2 + PC USB cable adapter. I am currently building the ...
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27 views

Issues with the dual VNH2SP30 motor carrier and 131:1 metal gearmotor 37Dx73L mm w/ 64 cpr encoders

For a while now I have been trying to build my own robotic platform, kind of like a turtlebot. However, I have kept running into an issue with controlling the motors. My main controller for sensor ...
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0answers
71 views

Mechanism to oscillate a human leg?

I'm working on creating a robotic device capable of oscillating an adult human leg using the knee as pivot, being able to constrain the amplitude of oscillation by controlling the mechanism with a ...
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0answers
617 views

mbed dc motor speed control using optocoupler encoder

i have been playing with mbed since few week ago and would like to create a test program for dcmotor speed control. im using a 24V dc motor with encoder attach.. then test, at first i test with ...
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0answers
147 views

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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0answers
37 views

Actuation of three reciprocating blades via conversion of rotary to linear

Sorry if this is out of robotics, but this seemed the closest. A motor has to be used to rotate three cranks. They are in the same plane, but each should not run at the same time. Only one that ...
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14 views

Motor Drive Sizing Drive continuous current / motor continuous stall current Ratio

I have a question about the ratio of the drive continuous current / motor continuous stall current. I read that a good ratio between these values is around 2, but cannot find an explanation why. I ...
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18 views

I’m not sure how to calculate the torque of a tank chassis what values do I need?

So I plan to build a robot-tank thing. It’s max weight will be 35kg and it’s driving wheel will have a radius of 0.05m. Those are the two values I know for certain and there will be no gears between ...
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0answers
42 views

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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32 views

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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0answers
21 views

Motor failure detection and compensation in quadcopter

I need to perform some analysis on motor failure detection and compensation in quadcopter. I have been using PX4+Gazebo for 3 months and recently found that it does not include motor failure detection ...
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0answers
11 views

Frame Rotation to Motor Displacement

I have the following problem: I have an x,y,z reference frame that is to be rotated around its x-axis and around its y-axis. Three axial motors Mp,Mq,Mr (120 deg apart) are responsible for these ...
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36 views

How to avoid hair entanglement in your robot wheels?

This isn't about any complex math or physics of robots, but rather an annoying practical issue I don't find much information about. My robot works indoors (house, office) and there's certainly going ...
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1answer
27 views

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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0answers
25 views

How to create a jumping mechanism for a small robotic car?

I have to create a jumping mechanism for a small robotic car and was thinking about using a spring mechanism to do so. However, due to dimensions (16cmx8cm) and mass constraints (below 200g) I cannot ...
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50 views

Need help regarding electromagnetic suspension implementation

I an trying to implement an electromagnetic suspension system on model/small scale (like the bose suspension system in this video: https://youtu.be/3KPYIaks1UY). Upon doing some research on this topic,...
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2answers
235 views

Why to seal a motor shaft, or the whole motor, for underwater ROV?

I just finished a competition for underwater robots. The water is about 40-50cm in depth and 90% of the designs just exposed the thrust motors completely in the water similar to the picture below and ...
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29 views

Motor driver PWM frequency

What can happen to the motor driver if I give input PWM frequency more than the rated(capacity)? I'm using Maxon motor with specifications: Operating on 24V Speed: 600 RPM Nominal Torque: 21 Kg-cm
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109 views

Removing the motor from a 2.5" HDD for controls project

I have a project that requires an extremely high rotation rate motor, and I have a 2.5" HDD that I'd like to take the motor out of. I chose a 2.5" HDD for lightweighting reasons and for the drive ...
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1answer
92 views

Can I apply a common voltage to a high speed running DC motor to stop it? Will it damage the DC motor?

I decelerate the velocity of my robot very quickly by applying a common voltage (eg. 24V to both the terminals using Motor driver) to the DC motors. Given, the motor is running at a very high speed ...
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1answer
132 views

Torque calculation for a shaft end effector

I would like to calculate the max torque and the rpm to select the right motor. the application does not require a very fast rotation speed (rpm) however it should be accurately controlled. I ...
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1answer
124 views

Moving clock arms individually

I have as project to build something like this ( using arduino if possible ): http://clockclock.com The one modelization that came across my mind is to take 2 sticks ( as clock arms ) and command ...
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4answers
1k views

Automatic forward and reverse Brushless Motor

The video Here shows a motor using rotational motion to move a load forward and then reverse back, without manually switching it to reverse. How can I program my brushless motor to operate like the ...
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28 views

Which motor is suitable for generating a constant pressure on objects?

I want to build a simple arm that can generate a pressure on a small object (a force of 50-100 gram is enough) and let go of it very quickly. Which motor can be used for this?
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28 views

Servo malfunction

Summary I am making an automatic door for my chickens including a servo motor. In the process I actually shorted my 5V from my Arduino. The servo is powered by external batteries and only gets its ...
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0answers
57 views

Tetrix Prizm and ROBOTC

I am currently trying to find if its possible to program a Tetrix Prizm motor controller with ROBOTC? Because I have an EV3 brain connected with the Prizm to a robot assembly with two motors, and I ...
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2answers
196 views

motor controlled lazy susan

I'm trying to figure out an easy lazy susan setup. This is for video production, I want to be able to put an object on the platter and get a smooth consistent turn in order to shoot the object ...
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1answer
1k views

L298N driver takes too much current

I'm using L298N motor driver to spin stepper motor (42BYGHM809). When connecting it to batteries(2*9v), the batteries heats up after few minutes and stop working, and when connecting it to power ...
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1answer
43 views

Calculating motor power and motor needs for 200 lbs load

I'm trying to make a load carrying robot which will follow a line and will have capacity to carry 200 lbs on concrete surface. What should be the horsepower for electrical motor to handle this on 0 ...