Questions tagged [motor]

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

Filter by
Sorted by
Tagged with
1 vote
1 answer
27 views

Controlling power input for different currents and voltages connected to the same power source

I am new to robotics and am struggling with the electronics a bit. I am using two 9 V batteries in series to provide 18 V. I need to power 2 x 12 W DC motors and an Arduino Uno. I need to divide the ...
0 votes
1 answer
58 views

ROS2 CANopen Stack

I'm trying to implement the ros2_canopen package for my Motor. So, i installed the package and set up all the configuration stuff. If i started the launch-file, I get following error message: ...
0 votes
0 answers
26 views

ros2_canopen implementation motor

I implemented the ros2_canopen Package for my Motor. So, the device started and i configured all the stuff with the yaml file. My yaml file can you see below: ...
0 votes
1 answer
119 views

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 ...
0 votes
0 answers
29 views

Incorrect values of encoder for mbot Ranger

I have an mbot ranger which uses the 180 Optical Encoder Motor (https://support.makeblock.com/hc/en-us/articles/12376087604887-About-180-Optical-Encoder-Motor-for-mBot-Ranger-). My final goal is to ...
0 votes
1 answer
45 views

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.
3 votes
2 answers
138 views

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, ...
0 votes
1 answer
44 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 ...
0 votes
0 answers
24 views

Simulating more powerful motors in Gazebo?

Is there a way to get Gazebo to recognize the power of a motor? I have a couple of powerful motors in my differential drive robot that given the weight of the robot I should be doing 16 feet/second ...
0 votes
0 answers
21 views

High speed, high precision motors for a Spherical Parallel Manipulator

As the title says, I am looking for motors suitable for my Spherical Parallel Manipulator. The Spherical Parallel Manipulator will have a camera (likely a DLSR) mounted to it. The motors need to be ...
0 votes
0 answers
32 views

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 ...
0 votes
1 answer
39 views

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 ...
0 votes
0 answers
37 views

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 ...
0 votes
1 answer
46 views

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 $l$ $...
2 votes
1 answer
153 views

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 ...
2 votes
1 answer
213 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 ...
-1 votes
2 answers
50 views

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 ...
0 votes
0 answers
8 views

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 ...
2 votes
3 answers
5k views

What are the equations of a s-curve position path?

I have a decoupled mechatronic system with two motors. I want for each motor to give a s-curve path as reference. You can see in the image below the position path, velocity and acceleration. All ...
1 vote
1 answer
39 views

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 ...
1 vote
2 answers
273 views

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 ...
0 votes
0 answers
22 views

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 ...
2 votes
2 answers
579 views

How to control a dc motor

I have 2 of these 12v motors and a 12v battery http://www.enigmaindustries.com/Motors/Bosch_EV_Warrior.htm I would like to know what the best solution for controlling this motor with an Arduino Uno ...
1 vote
1 answer
119 views

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 ...
2 votes
2 answers
503 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 ...
0 votes
0 answers
31 views

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 ...
1 vote
0 answers
75 views

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 ...
2 votes
1 answer
1k views

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 ...
11 votes
7 answers
13k views

What mechanical parts can be attached to a 28BYJ-48 stepper motor?

Sorry I am asking a mechanical question here, but, after all, where else people have experience with using motors? If there is a better forum for this, please do guide me. Everywhere I've seen online,...
1 vote
1 answer
141 views

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 ...
1 vote
2 answers
91 views

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 ...
0 votes
2 answers
435 views

Bump and turn toys: how do they work?

I remember that when I was a kid, in the 1980s, I had some toys made in Taiwan that basically worked like this: they moved forward uniterruptily until they bumped into an obstacle; then they moved ...
-2 votes
1 answer
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 votes
1 answer
514 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 ...
0 votes
1 answer
47 views

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 ...
0 votes
2 answers
29k 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 ...
0 votes
1 answer
51 views

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/...
1 vote
1 answer
47 views

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 ...
3 votes
1 answer
343 views

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.
0 votes
0 answers
27 views

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 ...
0 votes
1 answer
53 views

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 (...
1 vote
0 answers
77 views

Mechanism to oscillate a human leg? [closed]

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 ...
1 vote
2 answers
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 ?
1 vote
1 answer
187 views

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 ...
0 votes
0 answers
40 views

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 ...
2 votes
3 answers
281 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 ...
0 votes
2 answers
38 views

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 ...
0 votes
1 answer
53 views

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?
3 votes
1 answer
387 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 ...
19 votes
7 answers
8k views

Robot never goes straight

I am using 2 identical DC motors and a castor wheel. The motors are connected to L293D motor driver and are controlled by RPi. The robot is not going straight. It veers off to the right. I am ...

1
2 3 4 5
10