Final Project Journal

software I used:

Autodesk Fusion 360

Websites:

Grabcad

Design process:

Firstly, I designed the inner parts of the box, so that it will give me an overview about how much space every part will occupy, and their relative position to each others.

Then, I began to design the enclosure according to the measurements of the inner design after using Tinkercad to integrate all the inner components.

Inner parts:

1- Chamber body; I designed it with a size that can have the capacity of not more than 20 to 30 coin as a first version

2- Sorter part:

I tried different mechanisms for the sorting holes shape, then I chose the wide wholes mechanism that depend on the sliding speed of the coin body, which had the least errors and was more reliable. Also, I design walls for the slider to make a tracking way for the coins

3- Chamber despising opening:

I designed this part to give the chamber two functions

• to provide an open with the dimensions of one coin, which will have a functionality in the dispensing mechanism

• to give the chambers an inner geometry that prevent the coins from getting stuck at the corners, and to always fall on the open

• I designed this part to be 3D printed.

4- Chamber supporting bar:

this bar has the function of holding the coins chambers all together inside the box at a suitable position from the other components

4- Dispensing unit:

those are the components which will work in the dispensing mode and they are as follow:

• rotating disk, which is placed directly under the chamber open to hold the coin at a specific position, and when the servo motor rotate it, it will drag the coin and make it fall at a specific despising box the lay at the bottom of the box.

• servo motors supporter, to hold the motors at a suitable position from the chamber

5- despising box:

which is a small box at the bottom of the chamber to collect the dispensed coins, then the user gram it manually to get the coins

outer part:

1- Box sides:

I designed the sides to have holes for fixing the inner components on them with screw and nuts.

For fixing the sorter at a suitable angle, I tried many angles for sorting, and after reaching an appropriate one, I calculated the required distance between the wholes on the left and the right side to give it the appropriate inclination

2- Box front/back:

I designed the front part with a place for mounting the LCD display and a place for the Keypad; to do so, I downloaded STEP files of those parts from Grabcad, then I imported them into my design, after that I sketched the required mounting places for each components by placing the component over the front body and then project the parts to be mounted on the body.

For the back part, it was identical to the front without any mounting parts.

3- Upper/bottom parts:

for the upper part, I placed the coins entry at a space to be suitable for making the coin fall on the sorter properly.

for the bottom part, I used the project technique to make a mounting place for the Arduino

For all the box parts (inner and outer), I used the tabs and T- slots to integrate all the components with each other.

when I got stuck in fabrication step I reach Amany mainly for help, but regarding the coding challenges I prefer to do my own search until reaching the solution.

mistakes to be avoided:

1- manage your time wisely and always be prepared for facing tons of errors (things will never ever get right from the first time)

2- when your are in the designing phase; test every functionality unit before designing the next component; because if you modified it this will probably affect other parts orientations and dimensions

• as the separating part was not reliable, as I thought, I will work in developing it to be more efficient and have ess errors