Robotics Stack Exchange
Robotics Stack Exchange

Questions tagged [robotic-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. For the ARM CPU, use the tag arm-cpu.

A robotic arm is a type of mechanical arm, usually programmable, with similar functions to a human arm; an arm may a whole robot or just a part of a more complex robot.

Robotic arms come in all shapes and sizes. Most robotic arms are described by their degrees of freedom, or "The number of independent parameters that define its configuration". These parameters traditionally refer to rotations at locations or joints, such as "Shoulder" or "Elbow" or "Wrist".

For the ARM CPU, use the tag .

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What are these mechanical parts attached to robot arm structures, seen on larger robots?

Between the shoulder and elbow pitch joints, I see two types of connecting structures on larger robots. I've attached a picture. My questions: 1) What are each of the respective mechanical parts called? 2) What is their purpose for the robot…
JDS
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How to speed up robotic arm?

I need my robotic arm to ring a desk bell. I one on the maplins site usb robotic arm. It does seem very slow. What can I hack on it to boost the downwards and upwards speed. I need it hit the bell tip/platform quickly once or twice. This is…
Piotr Kula
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Robotic arm ["FAiL"] error display. - Festo / Mitsubishi Melfa RV-2AJ (Controller CR1-571)

To avoid wasting your time on this question, you might only want to react on this if you have knowledge of industrial robotic arms specific. Common troubleshooting is unlikely to fix this problem or could take too much time. We've started a project…
aaa
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velocity of the end-effector

The joint velocities are constant and equal to $\dot{\theta}_{2}$ = 1 and $\dot{\theta}_{1}$ = 1. How to Compute the velocity of the end-effector when $\theta_{2} =\pi/2$ and $\theta_{1} = \pi/6$
shr
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What is the advantage having seven degrees of freedom in a robotic arm?

I understand what six degrees of freedom is, but I encountered the term of seven degrees of freedom at multiple occasions in robotics. What does is the purpose of that extra degree of freedom?
Cedric Martens
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Why don't cheap toy robotic arms move smoothly?

Why don't cheap toy robotic arms like this move smoothly? Why can't it even move itself smoothly, (even without any load)? In other words - what do real industrial robotic arms have, that cheap toys don't?
Marian Paździoch
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How would I go about making an art drawing robot like this?

I saw this art drawing robot on youtube: http://www.youtube.com/watch?v=Wo15zXhFdzo What do I need to learn in order to build something like that? What are some beginner oriented projects that could lead up to building something like this? I'm an…
Ryan
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Degree of Freedom

A robotic arm should pick a cuboid up of a table, rotate it around its vertical axis and put it down on all possible positions. How many degrees of freedom are at least necessary? (All coordinates, that should be reached by the robotic arm, are in…
Cindy
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How to render a robotic arm in Unity?

As part of a research project, I'm creating synthetic data, using the Unity engine. I have the final pose of a robotic arm (6 params: 3 for orientation, 3 for location/position), and also a .ply file for the mesh. Is there any way I can use this…
Ambareesh
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How to calculate the max load that owi 535 arm can lift?

I am trying to calculate the max lifting capability of the OWI 535 arm. The robot has 3 DOF and 3 three 3 DC motor with the robot power source delivers an Operating Voltage current of 3 Volts. The motors have a Stall Torque 60g-cm. I would like to…
user16610
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Maximum distance for robotic arm throwing

I have a 6DOF robotic arm which I am using to throw a ball. Each joint can achieve a maximum velocity of 30 RPM (180 deg/s). I have been trying to generate joint angles manually and feeding them to see how far I can throw the ball until now. This…
Lonewolf
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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 what angle the arm is at. I was going to use this…
Michael Blake
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Recommendations for system to repeatedly force contact between head and desk

I frequently bang my head on my desk after performing a task poorly. I would like to eliminate the unnecessary middle step of actually performing a task poorly. As such, I would like to design a system to hold my head and repeatedly strike it…
Jason C
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May I have some suggestion on inexpensive robotic arm?

I want to build some simple application. I need a 5 or 6 degrees of freedom robotic arm. The arm must have feedback, so that I can control it preciously. The arm must be able to handle at least 5 lbs. And the arm would be able to work 10 hours a…
Marco
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How do you arrange the dof in a robotic arm?

I'm designing an arm that can manipulate objects on a table. My question is about the arrangement of the degrees of freedom. Different robots seem do have different arrangements of the degrees of freedom,. e.g. the open-source thor robot uses…
Tarrare
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