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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13
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5answers
44k views

How to convert vertical motion to horizontal?

I am interested in using this miniature motor Squiggle Micro Motor to create very tiny horizontal movements. However, due to very limited space, I can only place it vertically within my project. ...
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3answers
2k 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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1answer
26 views

BLDC Stuttering when attached to Arduino Nano

I am working on building a quadcopter with an Arduino nano. I am currently only working with 2 motors. However, I am experiencing an odd issue. When I try to run my motors, one of them runs fine, ...
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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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2answers
79 views

Why aren't my 4x 612 RPM motors driving with only 12 lb load?

I have purchased x4 612 RPM actobotics motors. Every time I try to drive the motors on ground, the motors stall, as if the torque was too low to drive. The motor model: servocity.com model #: 638284 ...
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2answers
29 views

Measuring a Motor's Internal Temperature

As a final safety measure regarding some high wattage motors, I want to measure their temperature (either internal or surface) in live time so that I can automatically kill the power if it crosses a ...
57
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2answers
106k views

Why are capacitors added to motors (in parallel); what is their purpose?

I've seen many motors having capacitors attached in parallel in bots. Apparently, this is for the "safety" of the motor. As I understand it, all these will do is smoothen any fluctuations--and I doubt ...
3
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1answer
77 views

Counterweight in arm designs

I wonder why most robotic arms use large J2 (shoulder) motors rather than counterweights. What sort of complexity do they add to the design beside increase in overall weight? In fact, rather than ...
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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 ...
2
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1answer
198 views

How do I convert centre-returning joystick values to dual hobby-motor direction?

Currently my setup is: 2x hobby TT motors connected to a Pi Zero with a motor HAT Python script running on the Pi which runs a Blynk python client and controls motors via the gpiozero library Blynk ...
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3answers
103 views

How to avoid false encoder counts due to vibration in robot?

I have a couple of motors on my mobile base other than the drive motors, and they tend to create vibration in the robot. When these motors are turned on, the wheel's encoder ticks increase without any ...
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1answer
112 views

Raspberry Pi & L298N & Johnny Five, motor turns when instantiated

I'm a newcomer to this kind of tinkering so please bear with me here. I've searched high and low for an answer but have been unable to find one. I have a Raspberry Pi Zero W hooked up to a L298N motor ...
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1answer
27 views

Understanding KGf.CM in Camera Robotic Head Design

I am attempting to design a robotic camera head - however, I am struggling to calculate the torque (in terms of KGf.CM) I will require to rotate the Y (tilt) axis of the head. The motor I intend to ...
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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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1answer
490 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
573 views

What is the difference between the holding torque and stall torque of a motor?

Do the terms holding torque and stall torque imply the same thing? The information on torque for these stepper motors is given as holding torque. While these servo motors have the torque given as ...
0
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1answer
19 views

AC Motors vs Hydraulic motors for skid-steering robot

I'm designing a mobile robot with tracks and skid-steering driving system and I am evaluating whether an electric motor would be better than a hydraulic one. I did some calculations, the total weight ...
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1answer
74 views

DC motors are stalling at low voltage (L298N controller)

I'm building a small tracked robot. Currently it's just a Raspberry Pi, two motors and an L298N controller. The problem I'm facing is that the motors are stalling at low voltages (which is what I ...
1
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1answer
39 views

Using Integral gain for motor positioning

I'm struggling to see how Integral gain is used for motor positioning (with an encoder on the shaft). Suppose we have an AC motor connected to a winch which drives an object forwards and backwards. ...
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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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0answers
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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1answer
35 views

Industry robot maximum torque

In google search, I find Abb industry robot wrist maximum torque is around 6000Nm, So I’m wondering, in most industry robot, how much the maximum torque can reach? In another words, which motor is ...
2
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1answer
36 views

Why applied joint torque will affect another joint?

I want to ask a very simple question. For the robot dynamics Newton-Euler algorithm, suppose there is a two-link planar robot, we can write the simple dynamic equation form as $M(\theta)\ddot{\theta} ...
0
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1answer
31 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
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0answers
51 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 ...
3
votes
1answer
38 views

Driving a small motor

I am trying to drive a small motor using (software emulated PWM) from a Pi like device. I'm following a circuit that looks like this:L https://www.instructables.com/id/Raspberry-Pi-GPIO-Circuits-...
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0answers
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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6answers
14k views

How to check for a sharp angle with a line follower?

I have the mBot robot and I want to program it to follow the line. So far it can pass any kind of line that is >90°. I want it to be able to pass 90°-ish angles as well. Like this one: The problem ...
2
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1answer
42 views

Are rotary encoders necessary for ball shooting mechanism?

I'm designing a bot for a TDP(Team Documentation Profile) for a competition which is supposed to throw a rugby ball. Since the deadline is closing in soon, I can't test things out myself. After ...
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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
115 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 ...
2
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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
759 views

control DC motor by Atmega and L298 code in Atmel Studio

I'm new to Atmel Studio. I used BASCOM-AVR until now. I know my question is very basic but I couldn't solve my problem by searching internet. I wrote a code in BASCOM (Basic laguage) to control two DC ...
38
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11answers
51k views

Preventing leaks in motor shafts for underwater bots

Whenever building an aquatic bot, we always have to take care to prevent leakages, for obvious reasons. Now, holes for wires can be made watertight easily--but what about motors? We can easily seal ...
0
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2answers
1k views

BetaFlight sees motors working, but motors not spinning

I am using FlySky i6 Transmitter and a FS-iA6B receiver. I have it set up using PPM and BetaFlight recognizes the motors in the Receiver section. All the values adjust according to the toggles and ...
2
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0answers
74 views

Choosing right motors for self-balancing robot [closed]

I’m looking for right motors for my first self-balancing robot. Design assumptions: robot height: around 120-200 mm robot weight: around 600-800 grams wheels: 80x10 mm or 90x10 mm battery voltage: ...
3
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1answer
56 views

What Battery Voltage to use?

Im currently designing a small robot that uses 2 of these 12v motors, which are manage by the L298N motor controller board, and is being controlled overall by an arduino. Now I have come across an ...
2
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1answer
35 views

Diagnosing a lower torque on one motor of a Zumo Robot

I have a Zumo Shield. It is small and tracked, and contains two micro metal gear motors soldered to it. In theory, these motors are identical and do seem to rotate at the same speed. However, the ...
0
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1answer
75 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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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 ...
0
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1answer
76 views

How to calculate the right needed Power?

Me and my team are building a robot and I need to calculate the Power of the motors. Through my research I found that I must know the needed torque for every motor and then convert it to electrical ...
3
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2answers
1k views

Encoder values for PID control

I'm working on a two-wheeled robot and I'm trying to implement a PID control for the motors. But I have a problem, all sources I found online said I have to calculate the error with my encoder values. ...
2
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1answer
29 views

Is there a table of DC motors in relation to weight/mass? I want to find the fastest for my build

I am building a line follower robot for a science competition, i have the weight of the components but i don't know what would be the fastest motor i could use to reach the best avg speed of the robot....
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2answers
157 views

Are all drone propellers compatible with all brushless motors?

I want to build a drone using these motors SunnySky X2212 KV1400 Brushless Motor For RC Drone FPV Racing Multi Rotor and these propellers DYNAM 2X RC Model Airplanes 9x5 Inch Nylon Propellers ...
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3answers
43 views

A powerful pull/rotate device that provides a certain (controllable) force?

I don't know how to call the device I'm looking for (or need to create), maybe you can help me with terminology too so I can at least search.. I want something that either rotates or pulls with a ...
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1answer
260 views

Unlabelled pins on this L293D dual DC motor driver

I've got this board from a local store. It's an L293D based dual DC motor driver. All the pins are labelled except the 5 on the bottom as shown in the picture below. Couldn't find any datasheet or ...
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1answer
32 views

Do I have to use the CAN protocol that the motor controller uses in order to communicate with it?

I have a question about using the CAN bus to control motor controllers. Do I have to use the CAN protocol that the motor controller uses, e.g. CANopen CiA DS 301 CiA profile 402, in order to ...
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1answer
74 views

unexpected inefficiency of a motor driver

I purchased one of these motor drivers and noticed that i was not getting as much time from my battery as i had expected. I tested the current draw when connecting my motor directly to the battery and ...
0
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1answer
25 views

How to get the accurancy of the position system?

I want to build a system for positioning objects. It should be driven by a DC motor and a sensor should control the rotation angle. For the positioning I want to design (calculation) the accuracy. ...
0
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1answer
52 views

How can a motor be run at higher voltage for longer?

A 12V windshield wiper motor to run at 24V for more speed but near-equal driving force. Testing with a variable DC supply between 21.6V & 26.4V showed the current maxes at 3.72 - 3.90A, as ...

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