Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Robot Arm

by feststoff, published

Robot Arm by feststoff Dec 18, 2013
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13075Views 2211Downloads Found in Robotics


This is a robot arm which is driven by servos and controlled via an arduino board.

Have a lock at the robot arm working as a business card dispenser:
Watch the basic joint move:
and the basement turn:



All you need to build this robot arm:

Print every part once, except "joint"- you need two of them.

3x servos (I used "Corona DS558HV" - these are quite strong)
6x ball bearings "67002RS" (10 x 15 x 4 mm)
12x M3 x 15 mm
4 pieces of 8mm aluminum pipe (there you can place the wires)

Power-supply, wires and a arduino board ;-)

UPDATE 24th Jan 2014:
There are now two version of the part "joint":

  • the normal one which works fine and has a minimal gap within the arm an soulder joint
  • the "large" version, which provides enough space for a bunch of cables leading into the aluminum pipes.

There are also two new versions of the parts "turn table" and "base counter". The original version is the compact one, version two provides more room for rotations movements. Be aware, that you can't mix parts of different versions.

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Why is the arm shaking ? Will using better servos fix that issue?

This would very well of put the source plan with file. Thank you

How is the physics/mechanism that let you grab the card? a vacuum sucker? sticking?

What is the overall reach of this arm? I need an arm that can reach about 90cm away, would this be able to do that?

Hi my name is Marco, I'd like to know arduino's sketch. Are you so kind to show it to me? Best regard and thanks Marco

In Austria all the hardware stores have these kind of pipes in a wide range of dimensions. The typical length is one meter.

Where did you find the pipes?

In Austria all the hardware stores sell these kind of pipes in a wide range of dimensions. The typical length is one meter.