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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601 views

Motor for DIY Electric skateboard

I've been planning to make an electric skateboard for a while now. All the tutorials that I have seen use brushless motors. However, where I live, its not possible to get the exact ones as shown in ...
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1answer
50 views

Will this have more or less lifting strength

Bit of an engineering question. If a snake robot is 100 cm long, and every 10 cm is another motor. Would the robot lift more weight, the longer/more motors attached to it.. or is lifting ability ...
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58 views

Can you detect if encoder wire is connected on a motor?

I am writing some logic for a PID controlled catapult (In order to improve precision). That is all fine and well. However, if, for some reason, the encoder wire disconnects, the motor spins ...
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1k views

DC motor - max current

I'm looking at the data sheet for a DC motor that states: Current consumption at nominal torque (mA): 380 I have a power supply that can deliver 500 mA. Can I ...
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3answers
604 views

Mobile robot speed synchronization for straight line moving

I would like to build a simple mobile robot with differential wheels, and I am currently design the wheel speed controller. After reading some papers, I noticed that to realize a straight line moving, ...
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1answer
176 views

How to control 6v micro solenoid from arduino

I want to control this solenoid from Arduino, but I am confused which transistors, resistors and diodes to choose. I have seen a lot of tutorials about controlling solenoid from Arduino, but all of ...
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759 views

difference between sabertooth motor controller and rc esc?

i am building a rc/robot mower. most of the youtube videos show the sabertooth motor controllers being used to connect the rc receiver to the dc motors. But here in Australia, the sabertooth i need ...
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3answers
4k views

Supplying power from a power bank to an arduino and DC Motors

I have a two port powerbank capable of supplying a maximum of 5V 2.1A I'm using it to power an Arduino and a L293D IC connected to two DC motors which have the following specifications: Working ...
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1answer
34 views

5kHz arm control, grasp end effector

I was having a chat with a robotic expert recently. The guy told me that for an arm with motor drives running at 5kHz your are to set the control so that someone can grasp the end effector and move it ...
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0answers
81 views

Single Board Computer/Microcontroller Recommendations for controlling large DC motors? [closed]

Hey looking for recommendations. Right now I am using a sabertooth 2x25 motor controller for my drive train, receiving signals from a raspberry pi. From what I am seeing online - there is a lot of ...
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1answer
295 views

Why to combine a Raspberry Pi (or similar board computer) and an Arduino for controlling motors?

I am planning to build a omnidirectional holonomic robot, and checking what I should use for the hardware, I saw many people using a Raspberry to compute most stuff, which in turn calls an Arduino to ...
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700 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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523 views

Robot clutch to disengage wheels

I have a robot that moves around autonomously. Very often I want to push the robot several feet to start a test over again, or sometimes I want to wheel the robot outside to my car or to a nearby ...
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808 views

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

What exactly does a motor driver do? Why do we need an additional power supply for motors? I'm a hobbyist and making a line follower from scratch.
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5k views

How to reduce the DC motor starting current?

I am making a bot with 4 motors with a stall current rating of 11.7A. I was using 4 separate motor controllers which has a peak current rating of 20A to control each motor. But when I gave power to ...
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1answer
55 views

Granite Devices Ioni Pro. PWM set point mode

Inspecting the PWM set point mode it seems HSIN2 is the PWM input, and HSIN1 is the PWM direction input. Is it possible to reverse this, so that it's more consistent with step and direction mode ...
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1k views

Line follower robot with 2 or 4 motors?

I am developing a line follower robot and I am not sure about how many motors should I use: two or four. I'm thinking of using four, but I do not know if it's worth it (it will let the car be heavier, ...
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1answer
792 views

How to calculate what wind speed is required to lift 1kg? [closed]

as the title says, i want to calculate how much km/h is required to lift 1kg of weight. Please explain this to me as simple as you can since i'm really noob in this. Thanks.
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1answer
41 views

Proper cable to connect 12 V, DC 6 Ah batteries to Sabertooth Motor Controller for Lawnbot?

I am building a (fork of) the Lawnbot-400 robot found on Instructables.com and in the book Arduino Robotics. The author, while brilliant, tends to gloss over and omit details, one of those being how ...
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117 views

Permanent Magnet DC Motor Calcuations

I have to determine speed and torque suitable for my combat robot. I've done some calculations and I need to know whether they're right or not (because they don't seem to be right). Suppose I have ...
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130 views

How can I turn a bowl/glass upside down?

I want to dispense water/cut-vegetables from a glass/bowl(240 ml) by turning it upside down. The screencast shows the idea: I can directly mount the clamp on a servo motor, but I think that will be a ...
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1answer
59 views

Plug & play motors, actuators and drivers system

I was wondering if anyone knew of any easy-to-use plug and play systems, that allow you to build and programme a number of actuators and motors quickly and easily? I'm thinking something like Lego ...
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3answers
4k views

One motor, two wheels (motor direction rotates one wheel forward, reverse for other wheel)?

Rewriting this whole question as I've learned a lot more since I first tried to ask. I'm building a tiny bot and looking to use two motorized wheels for movement, but only one motor. I'll have a 3rd ...
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160 views

Motor Controller Configuration

With a group of students we are building an exoskeleton for paraplegics. I am part of the Software & Control department and we are designing the motor controller configuration. We have several ...
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1answer
54 views

Granite devices Ionicube

Is it possible to enable/disable the 4 Ioni drives mounted in Ionicube individually? It appears with IoniCube that enable/disable applies to all Ioni drives simultaneously. However, Ionicube 1X does ...
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1answer
173 views

Implementation of the Control of a Quadrotor, as taught in Aerial Robotics in Coursera [closed]

I completed the course of Aerial Robotics in Coursera and I want to implement what I learned in a real quadrotor. The thing is that when I see the equations given like this: For the sake of the ...
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What is the difference between DC motor with encoder and DC with out encoder?

My question is: what is the difference between DC motor with encoder and DC without encoder? As long as I can control the speed of DC motor using PWM, for example on the Arduino, what is the ...
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1answer
194 views

Series Elastic Actuator (Passive compliance) vs Impedance or admittance control

I have designed a 2 Degree of Freedom robot using dc motor and gearbox. However, I wanted the robot to be compliant as it'll be used in an unstructured environment with humans. I wanted to know if ...
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284 views

IMU in a gimbal system

I have short question about the alexmos gimbal controller. The Controller receives the gyroscope and accelerometer sensor data from the IMU, that is mounted on the camera. In optimal case, the camera ...
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3answers
3k views

Connected battery, esc and motor does not power up the arduino

I am currently doing my first arduino project and i am having trouble finishing it. I have a 3s lipo battery connected with an esc (120A) that is connected to a motor (270KV). From the esc i am ...
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1answer
42 views

Motor-controller with path output [closed]

I'm entirely new to robotics and have the following design requirement for a project I'm working on: Given a robot capable of positioning an object in three dimensional space ( vis. a plastic ...
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2answers
295 views

Should I use an arduino to control my balancing robot's motors?

I'm building a 2-wheel balancing robot from old parts. DC motors from an old printer, wheels from a BBQ, bodywork from an old optical drive etc. The brain of the robot is a Raspberry Pi 3. I'm using ...
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1answer
418 views

How to dimension a 3 DOF robot arm with RRR configuration?

How can the maximum length and mass of the linkages of a RRR type robt arm be calculated, if the motor's mechanical characteristics are given?
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945 views

Driving sensorless three phase BLDC motor with Arduino and IMU

I have started to work on a little project of mines, which consists in implementing the stabilization a single axis gimbal using Arduino. The gimbal is driven by a sensorless three phase brushless DC ...
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2answers
3k views

What is the torque/force required to rotate the base of a robot arm?

Take a look at the following simple example robot arm: I want to know the torque required on that bottom motor to rotate the arm. Since it's not exactly rotating directly against gravity like the ...
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3answers
4k views

Harmonic drives in hobby projects

After a fair bit of research into industrial robot arms I've learned that a lot of them use components like harmonic drives and sometimes cycloidal gearboxes. Two main questions: How feasible are ...
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1answer
1k views

Need super-basic help with motor encoder

So I have this motor: https://www.servocity.com/23-rpm-hd-premium-planetary-gear-motor-w-encoder and this motor shield for my arduino uno: https://www.pololu.com/docs/pdf/0J49/...
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2answers
401 views

What are some ways to estimate torque/load on a robotic arm joint

My main problem is measuring joint torque/load economically. There are ways to detect the electric current drawn which is proportional to the torque. Since my motor is a BLDC motor, there will be a ...
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0answers
68 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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1answer
74 views

How to get started on making a dispenser for Indian spices?

I want to make a dispenser system for Indian spices. Dispense in multiple of teaspoons (5 ml) Handle powdered spices and small seeds like mustard/cumin I ordered a spice carousel from amazon and ...
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846 views

What types of actuators do these industrial bots use?

I have a particular example robot that interests me: http://www.scmp.com/tech/innovation/article/1829834/foxconns-foxbot-army-close-hitting-chinese-market-track-meet-30-cent See first image, the ...
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2answers
3k views

Quadrature encoder signal from dc motor is very noisy

I'm starting out with robotics, got my first DC gear motor with quadrature encoder (https://www.pololu.com/product/2824): I ultimately plan to hook it up to a motor driver connected to a Tiva ...
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1answer
106 views

What types of motor should I use for a particular application?

I want to create an amateur wire looping machine with Arduino, that has similar functionality than this machine. I don't need the automatic wire feeding as for my purposes this part can be done ...
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3answers
1k views

Power solution for Raspberry Pi robot

I am building a Pi car with 4 gear motors (190-250mAh each max). Now I want to use my 10000mAh USB power bank to power up raspberry pi along with the 4 gear motors. I can power up the raspberry pi ...
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1answer
378 views

Which kind of motors and how powerfull should they be for a robotic arm

I am building a robotic arm with these specifications: 1 meter long approx. 1kg weight it is made of 4 motors. (2 at the base. One for rotating the whole arm left and right and another one for ...
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2answers
60 views

Running a cycle on brushless outrunner motors? [closed]

Is it possible to convert a cycle into an electric bike by using brushless outrunner motors that usually are for RC planes, multicopter, helicopter, etc? If it is possible, what specs do my motors ...
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1answer
430 views

What are good, low cost, actuators for a braille tablet to be controlled by arduino?

I want to basically make a pin matrix controlled either by spring, electromagnets or small motors(spring being the most viable option), something like what’s shown in the image. I'm pretty new to ...
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1answer
454 views

Need help regarding odometry using Encoder motor and raspberry pi

I am doing project on odometry using raspberry pi. I know that encoder motor will tell me how much distance my robot has covered, but I have no idea ho to implement completely. I just need guideline ...
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3answers
3k views

Is horsepower related to torque in electric motors? [closed]

Is torque related to size or power at all in electric motors? And what about gas motors too? I have a go kart that is 2.5hp and it's 50cc and its about 1ft x 2ft x 1ft in size. I also see online ...
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899 views

Question about what motor to use for opening window

first off, just to be transparent, I'm a total newbie when it comes to DC motors (and pretty much anything robotic). I've got a couch that's right up to a window with the lever type openings (...

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