Questions tagged [robot]
The robot tag has no usage guidance.
49
questions
4
votes
3
answers
102
views
Battery considerations for robot hardware
[please don't 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 ...
- 41
0
votes
1
answer
30
views
Power layout for robot from 42 V to multiple output voltages
Most real robots will need to provide different voltage levels, i.e 5 V for MCU, 12 V for actuators, 19 V for PC/NUC 24 V etc. They also need to monitor charging and discharging of batteries.
I ...
0
votes
1
answer
109
views
Can someone help me identify this chip on a robot vacuum?
It’s on a Rowenta Xplorer series 50, seems like it controls one of the wheel motors and it fried
- 1
1
vote
1
answer
99
views
Dynamic model of three dof to state space?
I´m trying to convert a 3 dof robot manipulator from dynamic model to state space. I saw a video where explains how to convert a 2 dof robot manipulator, but I don´t know how to apply it to a 3 dof ...
1
vote
1
answer
61
views
Will running four motors (two high speed and two high torque) get the robot rolling? [closed]
I've been building a 2WD robot for 3 months now and been switching the motors frequently and been running into the same issue - low torque.
I had these low RPM, high torque motors around and thought: ...
- 13
1
vote
1
answer
94
views
Is this design of a motor controller valid?
I am trying to design a compact robotic actuator. My main focus with this project is to reduce the amount of external wiring needed to do with robots. With that in mind, I have thought of the ...
- 113
-1
votes
1
answer
142
views
Maximum weight for robot arm - MG996R [closed]
I want to build a robot arm (see here) to move a dumbbell of 2 kg (roughly 2.2 lbs).
However, since I have no background in engineering, I have no idea how to calculate / find out if the servos used (...
4
votes
2
answers
654
views
PID regulator for a self balancing robot
I am working on a self-balancing robot, trying to obtain the best values for the angle PID regulator. I have a working program, but I am stuck on the tuning part.
The robot can hold position after ...
- 41
-1
votes
1
answer
52
views
How to do sound localisation for an Inmoov Robot
I have to do sound localisation for a humanoid robot. This is my final year project given by our sir but I have no idea how to do it can anyone help me
- 1
0
votes
2
answers
131
views
Quasi Direct Drive Actuator - Slot & Pole Combinations for High Torque Motor
I am building my own Quasi Direct Drive actuator and looking for information/ design guidelines for building a High Torque Motor similar to the MIT Mini Cheetah below. Specifically I cannot seem to ...
0
votes
1
answer
101
views
Does anyone recognize this chip? B9930 FLC5068
I can't find it. Does anyone recognize this logo?
0
votes
1
answer
102
views
Problem with Motor Encoder - Arduino
I am having an issue with my motor control code.
The aim of the code is to control a motor which has a built in encoder. Now, I wrote a simple test code that makes a user enter the value between 1-...
- 281
2
votes
1
answer
221
views
Is my DC-motor strong enough to move this amount of weight?
I’m thinking about building a robot just with some old parts I have.
The main thing is the motors. I have 2 DC Motors
Specs below. (It’s a MFA975D Series with gear ratio 49:1)
Operation range(Voltage):...
0
votes
0
answers
55
views
Axis of Euler rotation matrix
I'm searching the way to measure rotational displacement by using Euler rotational matrix.
And I could find various information about it.
Then I've found something wrong with reference axis.
In the ...
2
votes
1
answer
9k
views
How to calculate the torque constant for a BLDC motor
I am designing a 12lb hobby robot with a 1000Kv BLDC motor at 14.8V nominal voltage and stall torque of 30A. How do I solve for the torque constant. I have seen equations where Kt(torque constant) = 1/...
- 21
0
votes
0
answers
279
views
Controlling DC motor with an Arduino motor shield using PID
I'm currently trying to control a DC motor using an Arduino motor shield using PID control. I found this code that can control the motor and also give encoder values and I adapted it for my motor ...
- 281
1
vote
1
answer
251
views
Servo motor speed and torque
From what I've read the speed is controlled based on the supplied power voltage, or using delay on arduino code, how about the torque, is there a way to make the servo motor change the torque ? like ...
- 111
4
votes
3
answers
1k
views
How far can radio signal be transmitted through a straight steel pipe?
We are needing to transmit data between a robot that will be traversing a pipe, and a base station located at the end of the pipe. The pipe is about 2 feet in diameter, made of steel, and is ...
- 165
0
votes
1
answer
30
views
Bluetooth not connecting error
I am making and robotic arm by using arduino and hc - 05 module and controlling that arm using mobile application now problem what i am facing is the mobile app dose not connect to bluetooth device ...
- 11
0
votes
0
answers
31
views
Controlling 9 servos with a Bluno board
I'm trying to build a robot that requires 5 micro servos and 4 standard servos. The micro controller board I am using is a 'DFRobot Bluno' (compatible with Arduino software). The board gets power from ...
- 41
1
vote
1
answer
70
views
How to effectively avoid current drops while stepping down the voltage?
We are using a PC power supply to power our project, which is a Robotic arm. Since our power supply has a 12V output voltage, can anyone please advise how to step down the voltage (12V) to 6V.
Using ...
- 11
1
vote
1
answer
786
views
Brushless motor control poisition (design own PID?)
I got a few motor similar to the image below from a old scanner and I want to apply them in a robotic arm to move the arm because BLDC motors have a large torque I then control with arduino. Well, in ...
0
votes
1
answer
33
views
What current rating should I be looking for on a Battery Management System?
I'm designing a power hungry robot and this is my first time constructing a battery pack. Specifically, I am going to use a 3(series) x4(parallel) 18650 battery pack using these Samsung 35E cells. The ...
- 11
1
vote
1
answer
294
views
Stepper Motors (NEMA-17) Won't Run When Wheels Are Attached
My team and I are creating a robot using 4 stepper motors with mecanum wheels and an Arduino Uno. The code appears to be correct, and the motors seem to run just fine on their own, but once we screw ...
-3
votes
1
answer
98
views
What makes a microcontroller development board powerful?
I'm seeing an awful lot of dev boards on the internet that arent Raspberry Pis or Arduinos and I'd like to know what makes a board powerful? Whats the difference between a board that may be used in a ...
0
votes
1
answer
1k
views
Servo motors twitching , arduino Mega [closed]
I am working on a school project: a robotic arm controlled by an Arduino Mega board,
6 servo motors:
https://hobbyking.com/en_us/power-hd-lw-20mg-servo.html?___store=en_us
1 PC power supply (450W),
...
0
votes
1
answer
69
views
2D Positioning Localization
I have a robot. My robot has three main sensors one is a gyro from which i can get my yaw, pitch, and roll. I also have an encoder in the x and y axis. How can I use these sensors together to reliably ...
0
votes
2
answers
115
views
Max current per battery chemistry
From the background and responses to my other question I gather that 5 NiMH batteries can provide more than 4 A current, and that Alkaline or Manganese batteries cannot.
So, what about LiPO, LiFePO4, ...
- 127
0
votes
1
answer
117
views
Required velocity of each wheel in 3-wheel omni bot [closed]
I'm using a 3-wheeled omni bot which can move in any horizontal direction (example: https://www.robotshop.com/en/3wd-48mm-omni-wheel-mobile-robot.html).
Given an object velocity (velocity at which ...
- 789
-1
votes
1
answer
93
views
Creating Light Sensor [closed]
So the situation is like this, I have a project with a budget of $25. I have to build a robot that is capable of connecting a magnet to a tin can autonomously. I also have a vex kit which I can use ...
-1
votes
1
answer
526
views
Running 18 servo motors on a Hexapod
I am working on a hexapod robot that has 18 servo motors(HS-475HB).
My problem is that when I use one servo, the current is about 0.7A at 6V (when moving the servo from its position), when I add ...
- 1
0
votes
4
answers
2k
views
Powering Multiple loads from a single 12v battery
I have built a 12v rover - designed to be fully autonomous with a 12v deep cell marine battery as its only power source.
It uses the following components:
...
- 3
1
vote
0
answers
74
views
Stepper motor torque requirements
I have a robot that has a load of 60kg and it has to move using 4 stepper motors. I saw from previous searches that the torque required by the motors to move is Force times the wheel radius.
COF = 0....
0
votes
1
answer
87
views
Will this N-Channel Mosfet work as high-current motor controller?
We are building a mobile robot which will use two motors in a differential drive configuration to maneuver and move around, and we want to choose the right driver IC or transistor circuit for the job ...
- 51
0
votes
1
answer
537
views
Darlington Transistor Array Overheating and failure
I own some animatronic robots that use solenoid valves to operate their mechanical movements.
Recently I created a pcb that uses three 8 channel Darlington Arrays ULN2803A to control the individual ...
0
votes
1
answer
696
views
Can lack of current cause servo motors to burn out?
I am building a quadruped robot from 10 MG996R servo motors. I am powering them with 12 Eneloop AA batteries, but I am starting to see that I might be lacking current. The servo spec says that each ...
- 105
0
votes
1
answer
1k
views
Ethernet, RS485, CanOpen how to choose the right for robotic Arm
I have a question regarding the communication protocol and physical layer of how to connect the motors of a robotic arm.
I have 4 servomotors, Brushless. I need to select a motor drive for each one. ...
0
votes
2
answers
152
views
Battery selection for a robot
I am currently building a line-following robot for a competition this summer. I have figured out everything except the power.
I expect my robot to draw 7.5 amps in the worst case. now, I've selected ...
- 512
-1
votes
2
answers
749
views
Does a circuit have to be run strictly on DC or AC? [closed]
Hi I know this might sound like dumb question but I've just ran into a problem on a design project. I have no real training or experience with EE or mechatronics and any help is greatly appreciation.
...
1
vote
2
answers
2k
views
Equalizing motors speed for balancing robot
I am currently working on a balancing robot project using Arduino Uno. I am able to get the robot to balance but one of its motor have the tendency to rotate more than the other.
I am using the ...
- 11
0
votes
1
answer
92
views
Sequential power circuit for 18 servos
I'm trying to design a servo control board to be a daughter card for DE0-NANO, but run into a problem where all the servos (18 for hexapod) get to the end position on power up.
The initial idea was to ...
- 29
3
votes
1
answer
590
views
Stepper vs servo or DC motor
My friend and I are currently working on a robotic vehicle project, and he had some spare steppers lying around from a previous project. Instead of using DC motors or servo motors, is it viably to use ...
- 321
0
votes
2
answers
1k
views
When to use PID for motor control?
I have a project involving a small robot and I need to write the firmware to control the wheels. Its not something I have done before, so I did some research.
In my research I saw that some people use ...
- 113
0
votes
0
answers
1k
views
Brushed or Brushless DC motor for self balancing robot?
I am looking to balance a robot using a flywheel connected to a DC motor (think of it as an inverted flywheel pendulum). Similar to this: https://www.youtube.com/watch?v=0312BNqIBFI
What I am unsure ...
- 109
1
vote
1
answer
2k
views
Why Roomba has IR bumper sensor array?
Roomba has two bumper sensors (left and right, this is what is mentioned almost everywhere), if pressed it recognizes obstacles.
Then what is the need of the extra array of IR sensors(6 in number).
...
- 141
0
votes
1
answer
2k
views
outdoor ultra sound positioning system robotic lawn mower [duplicate]
I have a dream to build robotic lawn mower that uses a positioning system, so that can cut grass once and effective. Building the robotic lawn mower is not a problem, but the navigation system is, so ...
- 58
2
votes
1
answer
6k
views
Basic Robotics Help. Variable motor speed control by ultrasonic sensor input on arduino
First, thank you for taking the time to read my post.
I am attempting to use an ultrasonic sensor to control a DC motor using the PWM output of an arduino. Fairly simple, I know, but I'm just a ...
- 21
-2
votes
0
answers
85
views
control circuit of humanoid robot: is it worth to learn and use ROS
i am building the upper body of a humanoid robot for my MSc thesis project with 24 dc motors
and multiple sensors(something like i-cub or Nao) i have basic
knowledge of communication protocols and ...
- 1
1
vote
0
answers
133
views
Reliable docking charging connector?
I am designing a mobile robot which needs to re-charge in a docking station, but I'm having difficulty deciding what to do about the connector. I have two choices: design and make our own connector, ...
- 27.2k