Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [arm]

The arm tag is intended to be used for questions relating to robotic arms from, small hobby arms with only 1 or 2 degrees of freedom to large industrial robots with complex joint assemblies.

2
votes
1answer
53 views

Making a motor controlled joint passive

Anyone know of a good (and economical) way to make a motor controlled arm become a passive link on trigger? That is, the joint can be active (motor controlled) or passive (rotate freely). The tip of ...
1
vote
1answer
39 views

Does the red object act as a fulcrum (as explained bellow) to make picking up easier?

In picture one I have shown a robot arm (green) rotating to pick up a box, using a fulcrum (red). The arm after rotating is shown with black rectangle. The vertical arm on the left is attached to the ...
1
vote
2answers
79 views

Hand eye calibration of robot arm using a 2D camera and marker of known size

If my understanding is correct, one flavor of hand eye calibration requires the following pairs of data for different robot arm positions: The transform from the robot base to the robot hand. The ...
1
vote
0answers
41 views

How to create a .urp for universal robots?

The polyscope platform of Universal Robots saves programs as *.urp. They are very different to urscrips. Is there a way to create such files without polyscope?
0
votes
3answers
76 views

Dimensioning a robotic arm for playing Chess

The intended purpose of the arm is to pick and place chess pieces. I am planing to make a 3 DoFs system (only using 2 joints mounted on a revolving turntable), the link structure should be composed ...
0
votes
1answer
247 views

How to plan path for robotic arm with RRT?

I have written simple RRT planner however I am not sure how to apply it to a robotic arm path planning. The issue is that of analytical solution absence to inverse kinematics problem. Let me explain. ...
1
vote
0answers
39 views

Correct Hardware for a Small Lightweight Robotic Arm

I'm building my first robotic arm and I am new to robotics generally, but I have tried to do some research. I need to build a robotic arm that will be relatively lightweight and will need to grab ...
0
votes
1answer
319 views

DH- Parameters of BCN3D Arm

Consider the following Arm: https://www.bcn3dtechnologies.com/en/bcn3d-moveo-the-future-of-learning/ I looked for the DH-Parameters of this arm and I found this: ...
-1
votes
2answers
51 views

(solved) How to glue syringe?

I foud tons of answer how glue with syringe, but I need to glue syriges together to be airtight and glue some silicon tube there too and cannot find a hint how to do it. Does anybody know what glue ...
0
votes
2answers
80 views

Are scissors what I want for moving straight up and out?

I'm a programmer. I had a tiny amount of experience building robots in college a few years ago, but haven't done anything since. I'd like to build a robot that can move around my house, pick items up ...
1
vote
3answers
523 views

Forward kinematics equations

I'm stuck at computing forward kinematics equations. I have configuration of the first two joints like on the following image: Transformation from the origin to the first joint basis is trivial: ...
1
vote
1answer
363 views

How to dimension a 3 DOF robot arm with RRR configuration?

How can the maximum length and mass of the linkages of a RRR type robt arm be calculated, if the motor's mechanical characteristics are given?
0
votes
1answer
43 views

Name of the linkage (or carriage) in video

I am trying to find the name (nomenclature) of the linkage (or carriage) that is being driven by the dual linear servo (actuator) arrangement in the following Youtube videos: Servo Basic Concepts ...
1
vote
1answer
1k views

How to compile arm compatible binary from an x86 precompiled library on a pc host to be run on an arm target? [closed]

I am using a library precompiled on x86 on my pc (x86_64). Does there exist any toolchain to compile the x86 library and in the end generate an executable for armv7l ubuntu?
5
votes
1answer
250 views

Anthropomorphic Arm

I developed an anthropomorphic arm (structure in aluminium) with 6 DOF (3 plus spherical wrist) for direct kinematic. I chose magnetic rotary encoders to measure angles but I am not satisfied, due ...
1
vote
1answer
550 views

How modular arm joints work [closed]

Hello I'm trying to figure out how modular arm joints are designed and what kind of bearings/shafts are used for a modular-type robotic arm. Take "UR arm" for example. I believe those 'T-shaped pipes' ...
5
votes
1answer
316 views

ROS on Raspberry Pi Model 2: UbuntuARM vs ROSBerryPi

Before I ask my question, I'd better confirm that I've read the most prominent post about running ROS on Raspberry Pi devices. That post contains some valuable information, but it's a bit dated, and ...
1
vote
2answers
73 views

Powering 6 servomotors requiring 6V and 2A each

The title pretty much says it all. I'm on a team that is currently building a robotic arm for the capstone project of my engineering degree, our design is similar to the Dobot (5 degrees of freedom). ...
2
votes
2answers
430 views

4dof or 5dof robot arm with stepper motors tool-chain for an hobbyist

In the past I built some simple robot arms at home, using RC servo motors or stepper motors (till 3dof). I would like to build a new arm with 4dof or 5dof with the steppers. Until now I used Arduino ...
2
votes
1answer
3k views

Design and construction of universal robotic arm (5kg, 1m)

i am working on my master's thesis about design and construction of universal robotic arm. Goal of my work is to design 5 DOF robotic arm. Something like on the picture: I need it to be able to ...
1
vote
0answers
254 views

Installing OpenNI on Pcduino

Following my previous question about pcduino+kinect, decided to go ahead and buy the pcduino I wish to run my robot with (kinect+pcduino+shields). However I'm having trouble getting started: I tried ...
1
vote
1answer
401 views

6 DOF Robotic Arm [closed]

We are building a 6 DOF robotic arm as a college project and we've almost finished the designs. The problem is with the controls. We still havent thought on how to control the arm, as in , software ...
2
votes
1answer
65 views

How long can a VEX pneumatic arm be?

How long can a vex pneumatic piston be?
0
votes
1answer
192 views

Where to ask NXP LPC1343 / ARM Cortex M3 related questions

I am a beginner to robotics and embedded systems. Consequently I have a lot of questions related to the toolchain and how things are going together like how to debug or how to connect a bluetooth ...
3
votes
3answers
1k views

VeX - Keeping arm at an angle

So my team made a Vex robot for the toss-up competition, but we need the arm up during the autonomous. The problem is that it's too heavy to stay up on its own. I was going to use encoders to count ...
5
votes
2answers
955 views

Udoo board + Kinect sensor?

I am wondering if it would be possible to get Kinect to work with Udoo board (Quad). I have found that there is now support for ROS + Udoo. Also saw a question asked about Xtion + Udoo which shows ...
6
votes
1answer
417 views

Stabilizing a Robot Arm at a Specified Height

I have a 4-bar linkage arm (or similar design) for a telerobot used in the VEX Robotics Competition. I want to be able to press buttons on my PS3-style controller to have the arm raise to certain ...
1
vote
1answer
95 views

TI ARM with stacked RAM

Do any of the TI ARM SOCs, e.g. OMAP or Da Vinci, have a version with stacked RAM? (e.g. DDR2 or mDDR) For miniature robots like micro drones, it would be really nice to not need to spend board area ...
8
votes
1answer
3k views

Building Robotic arm joint

I am very new to robotic design and I need to determine what parts I will need to assemble an arm joint. The joint will contain one timing belt pulley which a remote motor will be turning, a forearm ...
8
votes
2answers
780 views

Getting started with robotic arm design

I would like to design a robotic arm to hold a weight X at length Y (in my case I want to hold X=2.5 lbs at Y = 4 inches). Starting out simply, I would like try building an arm with a gripper plus one ...
13
votes
3answers
3k views

Inter-processor communication for robotic arm

I'm building a hobby 6-DOF robotic arm and am wondering what the best way is to communicate between the processors (3-4 AVRs, 18 inches max separation). I'd like to have the control loop run on the ...
-4
votes
2answers
277 views

Lightweight, commercially available robotic arms [closed]

I was wondering what options are there in terms of lightweight (< 5 lbs) robotic arms. I see Robai Cyton Gamma 300, and CrustCrawler AX18 look like interesting options. What lightweight arms do ...
1
vote
4answers
271 views

Processor and command interface preference for a robot arm

I want to build a robot arm that'll be approximately 1.25 meter long and will be able to lift up to 2 kilograms. It'll have 6 dof and it is an expensive project. And most importantly, i am the only ...
19
votes
4answers
9k views

How can the inverse kinematics problem be solved?

The forward kinematics of a robot arm can be solved easily. We can represent each joint using Denavit–Hartenberg transformation matrices. For example, if the $i^{th}$ joint is a linear actuator, it ...