Week 8

To design the sensor/potentiometer holder, I have discuss with my family relative to assist me in designing AutoCAD  2012 for sensor holder. All the dimensions were measured to make sure it is accurately measure the angle of ROM.
Using same material with mechanical, I decided to pick same thickness and material due to it's availability and sturdiness. These are pictures of sensor holder from AutoCAD software, showing the dimension, position and placement.

For motor driver, the L293D IC was tested to check the strength of motor torque to move the mechanical structure. But there are some minor problem, which is the prediction of current allowed in the motor driver when the DC motor on load. This prediction was based on L293D specification

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Week 7

Based on all components that involved in the project, I have listed and bought all the components from cytron company. All the components are used to construct a circuit that look and function alike Arduino kit.
After consultation with supervisor, she recommended different DC geared motor to be used in the project, to   drive the mechanical structure for moving smoothly.
These are technical specification of SPG30-150K and SPG50-100K

For programming section, I have configure the solution for loopback sub-routine.
Each function in the project must stay in loop, until enter button pressed to enter next function or cancel button to return to previous function.
This are sample of programming to loop in function.

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Week 6

Based on the flowchart that I have design during previous semester, I found that it was just a basic overview for the total of this project.
So, I expanded more and focus toward of each function to give a better understanding to write the assembly language for micro-controller.
There are some minor issue to understanding the flow for re-direct into sub-routine of each function.
Several testing were done to overcome the problem but no solution to be found at moment.

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Week 5

According to Mr. Fitri, the mechanical part has finished and ready to be operated for this project.
Due to material that has been used, the mild steel is heavier than stainless steel which is will be more cost to this project.
Total the weight of the mechanical part is around 10 kilograms or more.
Couples of testing were done to check the functionality of the mechanical.
The list of criteria is :
- When the motor rotating clockwise, the screw shaft has to rotate clockwise and the angle(ROM) is increased.
- When the motor rotating anti-clockwise, the screw shaft has to rotate anti-clockwise and the angle(ROM) is decreased.
- The lowest angle the mechanical can reached is 5 degree.
- The highest angle the mechanical can reached is 120 degree.

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