Group Members

Group members gathering together...

Part List

ADVANCED APPLIED MECHANICS PROJECT
PART LIST: PART PRICE:
1) ALL-PURPOSE CONTACT CEMENT RM4.50
2) MOTOR RM10.00
3) ADAPTER CONNECTOR N/A
4) 3V – 12V ADAPTER(AC – DC ADAPTER) N/A
5) SMALL BELTING N/A
6) CORD N/A
7) 3 WHEELS N/A
8) TYRE TUBE N/A
9) PLYWOOD FOR - PROJECT BASE N/A
- SHORT STAND N/A
- LONG STAND N/A
10) METAL ROD N/A
11) PULLEY N/A
12) GREY SPRAY PAINT RM5.50

Final Touch

At last, our model completed......

Video

Experiment Video Clip

Motor Efficiency

The graph above shows the efficiency of the motor versus mass. The 4.5V-400mA curve is higher than the 3V-400mA curve.
*p/s: pls click graph for better view

Motor Curve

This is the graph of motor output with variable load. The curve for the 4.5V-400mA is higher than 3V-400mA.
*p/s please click the graph for better view

Motor Curve

Experiment Results

The table above shows the result for our experiment with our model. There is 2 type of table that is provided with 2 different power input. The first one is 3V-400mA (1.2W) and the second one is 4.5V-400mA (1.8W).

*p/s please click the table for better view.

Experimenting Model

Our main objective in designing the model is to determine the motor curve and efficiency curve. We provide 2 different constant input power to the motor with 2 value of voltage and current;

a) 3 V - 400mA : Input Power = VI = 1.2W

b) 4.5 V - 400mA : Input Power = VI = 1.8W

We used 5 types of variable masses that is 45.7g, 74.0g, 95.6g, 119.7g, 162.0g.

We calculate the efficiency by using:

e=(Power Output/Power Input) x 100%

Power output = F.v

= mgv

Procedur step:

1. The adapter is swicthed into 3V with 400mA of current.

2. A load with a certain mass was placed to the hook supported by the load column.

3. The switch is turned on and the time taken, t for the load to reached 0.35m is recorded.

4. Step 3 is repeated 2 times and the average value of t is recorded.

5. Step 2 to 4 is reapeated by using another 4 types of masses.

6. Step 1 to 5 is repeated again by using 4.5V with 400mA of current.

Pulley and Gear Full Pictures

The picture shown above is the full scale of our pulley and gear system's model. The wheel that has been used in the model is the third wheel. We made another wheel that is even better than the second wheel. It vibrated less than the second wheel.

Calibrating The Motor's Belting

One of our members try to calibrate the motor's belting between the wheel to make sure the belting is fitted firmly to the motor's gear and the wheel. In this calibrating process, we're try to make sure there is no slipping between the wheel and the belting.
After the calibration process is complete, we placed the load's pulley to the upper column of the load stand.

Reinforcing The Load Column and Wheel Column

We reinforced the load column to the base by using multipurpose adhesive to prevent the column from vibrating during applied with load. We still using nail to enhance the other column. To make sure the load column is firmly attached to the base, we put some load (e.g. stone) to the upper side of the column during the adhesive is hardening.

Troubleshooting

At first, our pulley system were encountered with unbalanced wheel. The first wheel that our group was used is biscuit container's cover. The wheel vibrated vigourously when motor is on. We managed to overcome the problem by using an unused compact disc (CD) as the second wheel.

As a result, the second wheel rotates more stable compare to the first wheel.