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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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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, ...
CPK's user avatar
  • 31
2 votes
1 answer
240 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 ...
Ramses Estay's user avatar
1 vote
0 answers
87 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 ...
huiduan's user avatar
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1 vote
0 answers
46 views

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 ...
tguichaoua's user avatar
1 vote
0 answers
334 views

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 ...
Elazar M's user avatar
1 vote
0 answers
152 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 ...
DragonflyRobotics's user avatar
1 vote
0 answers
77 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 ...
John M.'s user avatar
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1 vote
0 answers
115 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 ...
Ind's user avatar
  • 111
1 vote
0 answers
58 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 ...
Utkarsh Verma's user avatar
1 vote
0 answers
72 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 ...
user24101's user avatar
1 vote
0 answers
226 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 ...
TheAce's user avatar
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1 vote
0 answers
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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 ...
Roy Xing's user avatar
1 vote
0 answers
698 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 ...
kai1709's user avatar
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1 vote
0 answers
45 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 ...
user4415's user avatar
0 votes
0 answers
10 views

What other BLDC form factors are out there and similar to Pancake style BLDCs?

What other form factors of BLDC motors are there which I should consider? I need to try to stay as compact as possible in at least one axis (like is accomplished by a pancake motor). I specifically ...
tniles's user avatar
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0 votes
0 answers
51 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: ...
H10's user avatar
  • 1
0 votes
1 answer
121 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: ...
H10's user avatar
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0 votes
0 answers
40 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 ...
umerkhan-mas's user avatar
0 votes
0 answers
26 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 ...
viper's user avatar
  • 1
0 votes
0 answers
25 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 ...
Mike's user avatar
  • 1
0 votes
1 answer
68 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.
zorx's user avatar
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0 votes
0 answers
33 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 ...
phil's user avatar
  • 21
0 votes
0 answers
57 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 ...
Aditya Vardhan's user avatar
0 votes
0 answers
9 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 ...
D. K.'s user avatar
  • 1
0 votes
0 answers
23 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 ...
Josh's user avatar
  • 1
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 ...
Ansh's user avatar
  • 1
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 ...
tniles's user avatar
  • 111
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 ...
user3450548's user avatar
0 votes
1 answer
130 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 ...
Ben Bird's user avatar
  • 101
0 votes
0 answers
27 views

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 ...
Crafty's user avatar
  • 1
0 votes
0 answers
35 views

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 ...
ooo's user avatar
  • 1
0 votes
0 answers
368 views

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 ...
bfris's user avatar
  • 109
0 votes
0 answers
301 views

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 ...
2012User's user avatar
  • 101
0 votes
0 answers
84 views

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 ...
bluesky's user avatar
  • 101
0 votes
0 answers
88 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
Nick O's user avatar
  • 1
0 votes
0 answers
44 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 ...
Alexandre Berkovic's user avatar
0 votes
0 answers
62 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,...
0xVikas's user avatar
0 votes
0 answers
36 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
Vivek's user avatar
  • 1
0 votes
0 answers
460 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 ...
CoilKid's user avatar
  • 101
0 votes
0 answers
29 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?
OMGsh's user avatar
  • 101
0 votes
1 answer
45 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 ...
Rob's user avatar
  • 1
0 votes
0 answers
77 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 ...
EnlightenedFunky's user avatar
-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 ...
Ofri Wienner's user avatar
-2 votes
1 answer
66 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 ...
she hates me's user avatar