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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2
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2answers
377 views

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 ...
3
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1answer
186 views

Stated power for a motor does not equal nominal voltage x current?

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 ...
3
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2answers
13k views

Choosing DC motor: max needed torque vs nominal 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 ...
6
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2answers
238 views

Do servo motor specifications take into account the gear ratio inside?

I am looking at buying a servo motor for a an application that must be able to lift 4-5 lb at a rotational speed of approximately 1rpm. The servo motor listed here http://www.robotshop.com/ca/en/hitec-...
1
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1answer
82 views

Replace screws with motors!

I am new to this space and the field. Please pardon my lack of intuition or knowledge. I have a recording stand with a join in between. a pair of screws through which the whole apparatus pivots like a ...
0
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2answers
152 views

Controlling Stepper or DC motor with L298 or L293 and getting operation similar to Servo for 6 dof arm

I will be using 1:4 gear ratio and thus will require a motor with a continuous 360 motion and a high torque for efficient functioning. Servo motors with continuous rotation and high torque are very ...
14
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1answer
1k views

Will turning an NXT motor by hand damage it?

I have heard a lot of claims that manually turning an NXT motor by hand can potentially damage it. I was wondering whether this was at least partially true, and whether there is any evidence to ...
0
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1answer
41 views

6 motors with TB6612 driver + power requirements

I am looking at the ServoCity Bogie platform - it comes with 6 motors. The motor listed specs are: Suggested Voltage: 4.5 VDC No Load Current: 190 mA Max. Load Current: 250 mA I ...
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1answer
176 views

Recommendations and Advice - Motor Driver for 12V Gear Motor with Magnetic Encoder

I am building a robotic insect leg that would be actuated by 2 DC motors for pan and tilt motions. Total weight of the leg is about 1.5kg and 1m long (moment arm ~0.5m). Magnetic encoder would be used ...
0
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1answer
29 views

Excessive Heat Coming From Video Transmitter and Motor Electronic Boards

I'm building a quadcopter and I'm finding that certain electronic boards are heating up beyond what I believe the heat should be. In this case I hooked up the video transmitter and then tested it. ...
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2answers
3k views

How to finely control a gear motor with encoder using Arduino/RPi?

I'm having trouble with getting this motor to work and could use some help/guidance, please. I have a micro gear motor with encoder which I got from ServoCity (https://www.servocity.com/90-rpm-micro-...
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2answers
72 views

How many stages necessary to stabilize position while controlling torque?

I'm assuming that since torque translates into acceleration, the basic transfer function from torque to position becomes $1/s ^ 3$ Does this mean that 3 pid controllers are required to properly ...
0
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1answer
56 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 ...
0
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1answer
64 views

What part do I need to bypass the gearbox of a hoveround motor? Helical splined hub?

I have an old powered wheelchair motor from a Hoveround. I have removed the gearbox and I would like to attach a lawnmower blade directly to the shaft. As you can see from the photo, it has 7 helical ...
1
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1answer
24 views

What motor features should I consider for automated blinds?

Not sure if this is the proper community, apologies if not. I'm wanting to start a DIY project at home to automate my blinds through Alexa. I'm comfortable with the tech from the microcontroller up, ...
0
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1answer
31 views

Power delivery issue for our human following robot project

We are very new in the game of robotics and we are dealing with a power delivery issue for our motors. We are using two 12V DC motors to give motion to our robot. We are using the L293D motor driver ...
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2answers
5k views

How can I calculate speed and torque of stepper motor screw

I want to choose stepper motor screw with slider for use it to shift cube with side 5 cm and wight 250 g . I found this motor .. how can I calculate speed and torque of slider
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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 ...
0
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2answers
137 views

Controlling a servocity planetary motor?

I know this might sound like a stupid question, but I actually need help with this. So, I'm looking at this motor: https://www.servocity.com/2737-rpm-premium-planetary-gear-motor. I have a raspberry ...
1
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2answers
394 views

How to maximize stall torque of a motor

I'm looking to use 3-phase motor without gearbox for robotics application. It will always work at near stall situation never rotating more than 360deg. I'm looking for arrangement that will produce ...
0
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1answer
234 views

Using hall sensors to calculate position

I have a geared DC motor with hall speed sensors. I want to count signals from the sensor to get position of the motor. Hall sensor has resolution of 12 CPR. Gear ratio is 1:810, which means that I ...
-1
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1answer
61 views

Control geared DC motor based on timing?

According to this video from Khan Academy about electronics of a DVD drive the position of the sled (which moves the reading head) is controlled by a geared DC motor by using only timing and one end-...
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1answer
381 views

How can I reduce vibration of motor pulley assembly?

My motor setup is vibrating too much for my intended project. Here are my assembled parts : ClearPath® - Integrated Servo System motor, p/n CPM-MCVC-2310S-RQN two Actobotics 15 Tooth, Flanged XL ...
0
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1answer
45 views

Probably basic question about how control a DC motor

over the past weeks I was trying to figure out how use the information from hall sensor to control a DC motor. Basically this is the motor which I'm using: https://www.servocity.com/32-rpm-hd-premium-...
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2answers
1k views

How to reduce the small free rotation/movement of a stepper motor shaft?

I was successful in running a 28BYj-48 stepper motor with 4096 steps per revolution. I am happy with the result. But there is a free movement of the motor shaft itself - you can move the motor shaft ...
0
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1answer
16k views

How much weight can DC Motor carry?

How much weight can following Brushed Motors carry together? 4X 12 Volt 100rpm supplied voltage => (5/17)*12 2X 12 Volt 100rpm supplied voltage => (7/17)*12 These motors are basically the wheels for ...
2
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2answers
2k views

DC Motors for a ROV?

I am planning to build a homemade ROV, and I wanted to know a couple of things about the motors. First is: Will it be Ok, if I use a brushed DC motor, instead of a brushless motor, and is there any ...
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2answers
1k views

Scara robot design

I found this drawing on google photos: I don't understand why he used this part. Is it for reduction? What is its equation?
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1answer
38 views

Identifying the connector on a micro planetary gear motor

I have purchased a couple of nifty little planetary gear motors and would like to incorporate them into my next project. could anyone help identify whether the connector is a commonly used one an ...
0
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1answer
108 views

How do i figure out how much thrust an 150cc Size Brushless Outrunner Motor will output with propellers? [duplicate]

I need to know this as i'm trying to figure out if two of these could lift approximately 170 pounds of wheight. And that's includig batterys and the motors.
2
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3answers
7k views

How to decide about the length of a robotic arm, the base of it and the torque?

I am designing a remote controlled robot which will have a base with three wheels, two of them will be simple wheels at the back of the base and the third will be a ball wheel at the front. It will ...
2
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2answers
931 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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1answer
38 views

Help with DC Gearmotor Specs

I need help understanding the specs of this RS Pro DC Geared Motor, Brushed, (RS: 238-9670). It has an operating range of 4.5-15V and a nominal voltage of 12V, so does that mean that it provides 0....
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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 ...
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2answers
1k views

Which USB interface for Android device I can use for motor driver

I am new to robotics, I will be controlling DC motors from Android device through USB For this I have selected L298N motor controller(After watching YouTube videos ) And got some DC motors I have no ...
-1
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2answers
976 views

DC geared Motor 20 NM 25 RPM small dimensions. [closed]

My application requires a DC geared motor with torque of 10 NM - 20 NM and low speed (25 RPM at most) and a small dimensions (120 mm length at most). I failed to find my specs at eBay, and Alibaba ...
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2answers
5k views

Can i use DC Brushed motors for building a drone? [closed]

I want to make a drone. But my budget is very low. Brushless motors are very expensive. I want use the Brushed CHEAP ones. can i us them ?
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0answers
204 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 ...
1
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1answer
409 views

Telescoping linear actuator [closed]

I need to find a linear actuator that can extend to multiple times it's length. I am going to be fixing the actuator horizontally and it will carry a light vertical load. So far I have thought of ...
3
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5answers
885 views

Moving a small plate back and forth

I'm hoping to move a plate (3MM x 45MM) back and forth using a DC motor. Here's my idea so far: The motor drives a threaded shaft which is attached on one side of the plate. To help alignment, a rod ...
3
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1answer
210 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 ...
2
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2answers
173 views

How to open a coffin for halloween decoration?

Let me start by saying that I know nothing about robotics. My wife goes a little crazy with Halloween decorations. She judges success by how many children she can make cry. Last year I built her a ...
1
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1answer
24 views

Suggestions for a rotational actuator [closed]

I am looking for a rotational actuator with high torque and one whose rotation angle can be controlled using the arduino control signals The project is an e-brake for an e-bike. Working mechanism ...
1
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1answer
153 views

Robot Position Control on Treadmill

Previous Question Hello, In continuation of my question above, I have another question. I have managed to control the speed of the treadmill using a PID and StevO mentioned to me how the scaling from ...
0
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2answers
119 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 ...
1
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1answer
99 views

Beach Cleaning Robot - Wheel Slip problem

I am building a beach cleaning robot. I am having problems with it moving on the Sand. I have attached a video of it struggling to move. How can I proceed (I think it has enough torque) . it moves ...
4
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1answer
156 views

TWIP robot - DC gearmotor speed/Encoders

I'm working on a self-balancing TWIP (Two-Wheel Inverted-Pendulum) robot project which will be using two brushed DC gearmotors with encoders. As there were no speed constraints for the robot (and ...
3
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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 ...
5
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1answer
388 views

Handling PID DC motor control at low speeds

I am building a 4 wheel rover and am using PID DC motor control for the back set of wheels. The feedback for the speed is provided by Hall effect sensors, with two pulses per rotation. This means ...
4
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2answers
24k views

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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