All Questions

6 views

How can I avoid Roomba Error 10 Code?

I am trying to run my 600 series Roomba in a large, open space (1700+sf) and it does not recognize the large, open space and throws the Error 10 code. It does not recognize an edge of 2 12"-3" ...
40 views

Is there a simpler way than ROS for 5 DOF Dynamixel arm control

I will have a 5 or 6 DOF arm build with Dynamixel or HerculeX smart servos. I need to move the gripper along Cartesian trajectory, which I will calculate in my C++ application. I looked at ROS, but ...
27 views

Robot wire follower + how to position on wire

I'm designing my lawn mower robot, and I am in the perimeter stage. The electronic part is done, and works quite good, now comes the software. I need an advice on how to deal with the problem of ...
12 views

What is the difference between a CNC router versus a CNC mill?

People at the RepRap 3d-printing project often mention CNC routers or CNC mills. Both kinds of machines almost always have a motorized spindle with stepper motors to move the spindle in the X, Y, and ...
26 views

image processing

I am making a Robot goalie, the robot is supposed to detect whether a ball has been thrown in its direction , sense the direction of the ball and then stop it from entering the goal post. A webcam ...
13 views

Can digital servo motors be modified for continuous rotation? [duplicate]

In an autonomous mobile robot, we're planning on using digital servo motors to drive the wheels. Servo motors usually don't rotate continuously. However, they can be modified to do so based on many ...
20 views

Required materials/knowledge to build a vending machine behind a 10'x10' store display window? [on hold]

I run a electronics repair shop here in nyc and I have a 10' x 10' display window facing the street. I can do all types of soldering jobs and anything electronics related, but I do not have an ...
50 views

Robot arm reachability of a pose in Cartesian space

Given a set of robot joint angles (i.e. 7DoF) $\textbf{q} = [q_1, ... , q_n]$ one can calculate the resulting end-effector pose (denoted as $\textbf{x}_\text{EEF}$), using the foward kinematic map. ...
14 views

Dc motor starting [on hold]

can someone please give me can someone please give me the circuit diagram of how to start a 12v dc motor using a 12v battery and a 24v 2200uf capacitor. i want to build a generator with a Dc motor ...
23 views

How much offset speed of motors on an axis is required before adjusting pid

For adjusting the pid for quadcopter, how much speed of motors are required before adjusting the pid. Do we need to give so much offset speed so that it cancels weight? I am sure we cant start ...
39 views

what's confidence level? and how can we use it for vehicle detection using OpenCV?

I'm working on project for the Autonomous vehicle, and i want to know what's confidence level means and how can we use confidence level for vehicle detection in OpenCV ?
25 views

When to use multiple batteries vs a UBEC

When should you use multiple separate batteries vs a single battery with multiple UBECs? I'm trying to design the power system for a small 2-wheeled robot. Aside from the 2 main drive motors, it also ...
19 views

Implement of a vocal interface on a arducopter

I'm a student working on a robotics project, and I'm a complete beginner in robotics. I'm working on the ArduCopter structure, using the ArduPilot Mega associated with the Ardupilot IMU as my ...
9 views

geared motor( micro motor) attached to usb [on hold]

are there any geared motors ( micro motors) attached to a usb we need it for renewable energy device that charges cellphones, we need several thousands ( if you do you will thank me tremendously I ...
41 views

Can someone explaine to me this code? [closed]

static void set_default_param(DPMTTICParam& param) { param.overlap = 0.4; param.threshold = -0.5; param.lambda = 10; param.num_cells = 8; }
19 views

How Should I tie My quadcopter to some thing, to adjust pid on one axis

I am stuck in adjusting the PID of my quadcopter, I cant adjust them on the fly because it just get out of control. I am adjusting them while attaching my quadcopter to something. Is this method ...
21 views

Sensor orientation of an external magnetometer [on hold]

On many drones are already external magnetometers. Unfortunately, the orientation of such sensors is sometimes unknown. E.g. the sensor can be tilted 180° (pitch/roll) or X° in yaw. I was wondering, ...
37 views

Using SLAM to create 2D topography

I have a small mobile robot with a LidarLite laser range finder attached to a servo. As of now I have the range finder side-sweeping in a 30 degree arc, taking continuous distance readings to the side ...
30 views

Using DC motor as a generator to recharge battery of my robot

I am trying to recharge my 12V lead acid battery with a 12V DC motor. I am using the battery to power the robot when it climbs. When it descends, I notice that I dont need to apply reverse voltage ...
19 views

High-traction thin tires vs Wide moderate-traction tires? [Sumo-bot] [on hold]

I am building a sumo-bot and our competitors have thin sticky tires, while we have wider and less sticky tires. The diameter is the same, and the gearbox/motor is the same. Who will win? PS: Sticky ...
38 views

“Thermal Imaging” with Arduino and/or Lego Mindstorm NXT 2.0?

I'm trying to build a robot that can be sent into rooms/buildings and detect people using nxt and/or Arduino. In addition to this I would like to be able to view what my robot is "seeing" in real-time ...
19 views

how can i make robot that DEPART on th SOFFIT [on hold]

I am mechanical engineer. I want to make a vehicle that it can to move on the roof.
17 views

finding and reaching destination [on hold]

we are making a bot which should reach many different destinations.No grid is involved. how will the bot sense the destinations and reach there.what kinds of sensors should we use.what controller ...
13 views

Anyone has tips on the mechanics of a 3-axis gimbal? [on hold]

I need to build a custom mod on a quad copter to attach a tablet-sized sensor/camera device. The key to accomplish what the device does is to ensure minimal "choppiness " during the flight. In short, ...
10 views

Interferences while using two ToF cameras

Im using two time-of-flight (ToF) cameras, a DS325 from SoftKinetic and a Creative Senz3D, at the same time with the DepthSense-SDK and the Point-Cloud-Library (on Ubuntu 15.04). But I got strong ...
17 views

“Ambiguous up to scale” , Explanation required

I am reading "Computer Vision: Models, Learning, and Inference" in which author writes at several points (like on page 428-429) that although matrix A seems to have 'n' degree of freedom but since it ...
42 views

Line following robot path planning

I have built a mobile robot with several ultrasonic sensors to detect obstacles and an infrared sensor to track a line as a path. I have written a simple algorithm to follow the line which works fine, ...
59 views

Why are bipedal robots difficult?

Not sure if this has been asked, but there are lots of simulations of bipedal locomotion algorithms online, some of the evolutionary algorithms converge to very good solutions. So it seems to me that ...
63 views

How to calculate the current consumed by a brushless motor on a quadcopter

I want to create a virtual quadcopter model, but I am struggling to come up with a satisfying model for the brushless motors & props. Let's take an example, based on the great eCalc tool: ...
28 views

Can i connect the arduino usb to laptop after the arduino is started

I have some sensors attached to arduino uno r3 and an esc. I start the Motor attached to esc through ardiuno with no usb connected to laptop. It starts correctly. There is a must that i will have to ...
14 views

How to make an automatic batcher? [closed]

I want to make an automatic batcher for light weights (IE 10-200 gr of sugar, salt, flour). How can I make it? I tried to google it, but w/o success.
44 views

Two exclusive inputs control

I have a system with two inputs (throttle and brake) and one output (speed). How does one design a controller in such a way that the two outputs of the controller (throttle and brake) are never both ...
31 views

Powering my robot with 12V battery which is charged by a gas/petrol generator while the robot is operating?

A have designed a robot to perform tasks in farms. But the problem now is I'm not sure on the best way to supply continuous power to my robot. All the motors are rated at 12V and only Arduino and a ...
23 views

Device to generate screen tap response

I have extremely limited knowledge in the general topic of robotics and therefore this question is a shot in the dark. Please let me know if the topic is unsuitable for the site. I am interested in ...
8 views

What sensors and MCU does VectorNav VN300 use internally?

I'm hesitant to open up a mucho-VectorNav VN300 to see what's inside. Does anybody here know what underlying sensors it uses? The accel, gyro, and mag outputs ...
30 views

Covariance and optimization

I am trying to build a map containing lamps as landmarks. I drive around with a robot and a monocular camera looking to the ceiling. The first step is detect the edges of each observed rectangular ...
25 views

Do you know where to get the original iRobot Create? [closed]

Does anyone out there know where I can get the original iRobot Create? The company no longer sells them. It was only 2 years ago that it was sold. It is white and its value is the physical design, ...
121 views

Multiple control loops with overlapping effects

I'm familiar with using PID to perform closed loop control when there is a single output and a single error signal for how well the output is achieving the desired set-point. Suppose, however, there ...
34 views

How to use specific ESC,BLDC motor through Arduino Uno R3?

Attempt to clean up: I'm trying to use this motor with this ESC and an Arduino Uno R3. Typically, I used the PWM pins when I use the Arduino and an ESC, but I can't control the motor even if I use ...
66 views

Are there systematic ways to tune the Kalman filter in engineering practice?

Including Q, R, and initial states of x and P.
57 views

2D Positioning of mobile robot [closed]

I am just starting to explore an idea and I am somewhat of a novice in robotics. I am looking to position a mobile robot as accurately as possible on a concrete slab. This would be during new ...
15 views

Should a MG996R Servo's extreme position change over time?

This question is a follow on from my previous question, Overheating/Jamming MG996 servo. I have recently purchased my first ever servo, a cheap unbranded Chinese MG996R servo, for £3.20 on eBay. ...
29 views

Overheating/Jamming MG996R servo

I have recently purchased my first ever servo, a cheap unbranded Chinese MG996R servo, for £3.20 on eBay. I am using it in conjunction with a Arduino Servo shield (see below): As soon as it ...
36 views

Robotic legs technologies [closed]

what robotic leg technologies are available. i'm sorry if this is a basic question i am a software developer looking to get into the field of robotics. i am particularly interested in robotic legs ...
36 views

How can I control fast real time sensor (250Hz) with slow system display(60Hz)

We do some experiments of real time representation of sensor position on TV. In this experiments, we used sensors for collect real time position in 3D at 250Hz and TV for Display the sensor position ...
33 views

What is the learning (control) algorithm inside Cubli?

As in this video: https://www.youtube.com/watch?v=qce5Vguj5Jg In this new version (did not see the learning part in the past versions), with three to four trials, Cubli can learn to balance on a new ...
71 views

Is it safe to give 5v through 5v pin of arduino uno r3 while usb cable inserted

Is it safe to give 5v through 5v pin of arduino uno r3 while the USB cable is inserted? I have ESCs connected to it which aren't likely to start in other cases. The 5v and gnd is coming from the BEC ...
25 views

Wifi module for Zumo robot

I'm a CS student trying to implement a clustering algorithm that would work for a set of robots in an indoor controlled environment. I'm still starting on Robotics and don't have much experiencing in ...