The hydraulic arm will successfully lift the Coke can over the 4-inch cardboard wall and place it at Point B if the arm has sufficient strength, range of motion, and height.

 Hydraulic systems use liquids under pressure to create movement. They are commonly used in machines like excavators, forklifts, and robotic arms because they provide smooth and powerful motion. In this experiment, a hydraulic arm is used to lift a Coke can and move it over a 4-inch wall, testing the principles of hydraulics in action. The hydraulic arm operates using syringes, tubes, and water. When one syringe is pushed, the water inside moves through the tube and pushes another syringe, causing the arm to move. This process is based on Pascal’s Law, which states that pressure applied to a fluid in a closed system is transmitted equally in all directions.

•  Independent variables: We changed the gripping strength and the amount of the water in the syringes. We also changed the wall.

   Dependent variables: We measured if the hydraulic arm successfully lifts up the coke can to point b over a 4 inch cardboard wall.

   Controlled variables: We never changed the base, Coke can, and Metal wires.  

Step 1: Get materials

Step 2: Making the blueprint

Step 3: Make arm support and forearm

Step 4: Make the gripper/hand/claw

Step 5: Drilling the holes

Step 6: Dry fitting

Step 7: Cutting the metal wires

Step 8: Preparing the syringes

Step 9: Placing the syringes

Step 10: Rotating platform mechanism

Step 11: Finish the gripper

Step 12: Snip the ends of the toothpick

Step 13: Inserting the water

Step 14: insert the plastic tubes

Step 15: Check for leaks

Step 16: It’s Complete

• The arm successfully grabbed the can in all trials, showing the gripper worked well.
• In Trial 1, the arm lifted the can over the wall but dropped it.
• In Trial 2, the arm couldn’t lift the can high enough.
• In Trial 3, the arm lifted the can, moved it over the wall, and placed it at the target.

The experiment showed that the hydraulic arm can lift a Coke can from Point A, move it over a 4-inch wall, and place it at Point B. But this only worked perfectly in Trial 3, when the arm was controlled more smoothly.

• Trial 1: The arm picked up the can and got it over the wall but dropped it before reaching Point B.
• Trial 2: The arm picked up the can but couldn’t lift it high enough to go over the wall.
• Trial 3: The arm successfully picked up the can, lifted it over the wall, and placed it at Point B.

The experiment proves that the hydraulic arm can do the task, but it needs careful control and must be built with enough strength and height to succeed.

-The water leaking out of the tube  reduced the pressure needed for the arm

-The Toothpicks breaking reduced the stability of the arm

-The Syringes slipping out of zip ties

-Excessive force caused syringes to pop out of their holders

-The hot glue joints snapped, causing parts of the structure, such as the rotating system, to stop functioning properly.

-the claw not closing fully making it difficult to grip and hold the Coke can securely.

-The glue blocking the entry of the plastic tube making it hard to push the syringe to make the arm work.

https://www.instructables.com/CARDBOARD-Robotic-Hydraulic-Arm/

https://www.youtube.com/watch?v=P2r9U4wkjcc

https://www.youtube.com/watch?v=LJDABBAT6o8

https://makezine.com/article/technology/robotics/making-an-impressive-robotic-arm-from-cardboard/