Page 66 - ROTAMIZ BİLİM- ARAKLI MERKEZ İLKOKULU

HYDRAULIC ROBOT ARM CONSTRUCTION PROJECT

Purpose of the Project
The aim of this project is to enable the movement of an arm by using the pressure-
transmitting property of liquids (hydraulic system) and to understand the working principle
of robotic arms.

Materials Used
For this project, we need a large amount of stiff cardboard, 8 syringes of 10 ml each, and
approximately 2 meters of IV tubing compatible with the syringes. Skewers or toothpicks
can be used to create the necessary connections. A hot glue gun is required for bonding, and
a utility knife is needed for cutting.

Construction Stages
The arm consists of three main parts: the Base, the Main Arm (shoulder and elbow), and
the Gripper (hand). We draw and cut two identical copies of each arm part on cardboard.
Small holes are made at the joint points so that skewers can pass through them. The
cardboard pieces are connected with skewers while leaving some space between them. At
this stage, we must ensure that the joints can move freely. One syringe will be fixed to each
movable joint.

Setting Up the Hydraulic System (Most Important Part)
To ensure the system works properly, we must pay attention to the following points:
1. One end of the tube should be attached to an empty syringe, and the other end to a
syringe completely filled with water.
2. Care must be taken to ensure that there are no air bubbles inside the tube. Since air can
be compressed, it reduces system pressure. Filling the tubes completely with water prevents
this problem.
3. One of the syringes should be fixed onto the arm as the actuator, and the other should be
fixed onto the control panel as the controller.

Project Outcome
When the syringe on the control panel is pushed, the liquid pressure is transmitted through
the tube to the syringe on the arm, causing the arm to move. With this movement, we were
able to carry an object from one point to another. In this way, we understood the working
principles of heavy machinery (such as excavators and cranes) and robotic arms.

Translated by
Çiğdem ŞARAPLI
Trabzon Uni.Translation and Interpreting

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ROTAMIZ BİLİM