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
0answers
13 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. I have looked at the torque tables on this ...
0
votes
0answers
25 views

How to avoid hair entanglement in your robot wheels?

This isn't about any complex math or physics of robots, but rather an annoying practical issue I don't find much information about. My robot works indoors (house, office) and there's certainly going ...
2
votes
1answer
27 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 ...
1
vote
0answers
23 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 ...
0
votes
1answer
22 views

Given this old pin diagram and numbers on this old encoder, what would be a suitable modern encoder to use?

My place of work has recently acquired a Hydraulic Press Break from the 80's. It has a CNC controlled back stop which is driven by a DC motor and Screw drive. The encoder which couples to the motor ...
0
votes
2answers
26 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 ...
0
votes
3answers
36 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 ...
1
vote
1answer
36 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 ...
1
vote
0answers
28 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 ...
1
vote
1answer
31 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 ...
2
votes
2answers
33 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, ...
1
vote
1answer
17 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 ...
0
votes
1answer
12 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 ...
1
vote
1answer
27 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. ...
0
votes
1answer
18 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 ...
0
votes
0answers
22 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 ...
1
vote
1answer
30 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 ...
0
votes
0answers
44 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,...
1
vote
1answer
32 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 ...
0
votes
1answer
24 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
1answer
30 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} ...
2
votes
0answers
38 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
36 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-...
0
votes
1answer
71 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
0answers
10 views

How to design a 3-Phase InductionMotor?

In order to carry out transient analysis of 3-Phase induction motor in MAXWELL2D, we first need to use RMXpert model wherein we need to give around 59-60 different geometrical parameters that involve ...
0
votes
0answers
22 views

Why is motor run in saturation region?

It is well know that operating the motor in saturation region causes current harmonics and will lead to degradation of motor. Still in literature it is said that motor is run in saturation region. ...
0
votes
0answers
26 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
1
vote
0answers
34 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 ...
2
votes
1answer
39 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 ...
0
votes
0answers
21 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 ...
0
votes
1answer
40 views

BLDC Outrunner Direction Change?

I'm designing a Quadcopter for my project. I've seen a lot of guides that the motor rotational direction should be opposite to each other. My doubt is whether the motor have a variety of CW rotation ...
0
votes
0answers
31 views

Robot-telescope prototype controlled by a PC

Has anyone developed mechatronic systems for DIY-telescopes running a PC? Please share your experience, knowledge and nuances (how you acquired current sensors, speeds, electric motors, about ...
0
votes
2answers
71 views

Stepper can't turn plastic wheel. Is it normal?

Is it normal, that a stepper motor with the following specifications can't reliably turn a plastic wheel with a diameter of 13cm and a simple direct coupling? Type: bipolar, two phases Voltage: 2.55V ...
0
votes
1answer
59 views

Can I apply a common voltage to a high speed running DC motor to stop it? Will it damage the DC motor?

I decelerate the velocity of my robot very quickly by applying a common voltage (eg. 24V to both the terminals using Motor driver) to the DC motors. Given, the motor is running at a very high speed ...
0
votes
1answer
58 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 ...
1
vote
1answer
30 views

Drive axis with slipping gear

I'm looking for a name of the mechanic part (axis-gear combination) with the following description to use it in an automatic window control. I can't find this online to get parts due to the lack of ...
2
votes
0answers
29 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
votes
1answer
48 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
votes
1answer
33 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 ...
2
votes
1answer
50 views

Can't run DC Motor with Arduino and Adafruit Motor Shield

I'm very new with Arduino and Adafruit and I'm trying to get a DC motor running with my Adafruit Motor Shield V2.3, but it's not running. I have connected the motor to the right terminal (M3). I'm ...
1
vote
0answers
19 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
votes
1answer
30 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 ...
0
votes
0answers
23 views

Move two DC brush motors at the same time using Kangaroo and Sabertooth

I had been doing a project which we are using kangaroo and sabertooth 2x32 to move two brush motors with an encoder. There are many obstacles that we overcome. from different signal, tuning etc., ...
0
votes
1answer
66 views

Moving clock arms individually

I have as project to build something like this ( using arduino if possible ): http://clockclock.com The one modelization that came across my mind is to take 2 sticks ( as clock arms ) and command ...
2
votes
1answer
27 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....
1
vote
3answers
32 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 ...
0
votes
1answer
60 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 ...
0
votes
1answer
30 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 ...
0
votes
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. ...
1
vote
1answer
26 views

Max motor voltage for RoboClaw controller

The RoboClaw data sheet from ServoCity mentions various current limits, but what about voltage? Can I run a 110 Vdc treadmill motor?

1
2 3 4 5
9