Week 16 The Can-Can Challenge.

All the drilling , cutting ,final changes and assembly were done , this is our how our final mechanism looked like.

Side View :


Front View:



Well it looks pretty simple but it took quite awhile to make it fit together.

One of the problems we encounter were space limitation , due to the fact that we used two servo motors instead of one.The plate that held the two motors into place were pretty small , this caused our mechanism to knock against each other when it operates.We solved this problem by placing each arm on a different level , One higher then the other and we filed off any unnecessary corners that would allow the restriction of movement.

Programming was also tough as we had to program two servo motors at once.This was easily solved by our group's programmer.

After we made some final touches , the Can-Can challenge begins.


Our Group B's first try :



We didn't do too bad , on our first try we got a total of 10 cans.But one other group had 11 cans on their second try.So we prayed that we would exceed their score on the second try.



We did better in our second try , we scored a total of 13 cans.We ended up with the highest score among the groups.This goes to show simple designs has its advantages. With this the Can-Can Challenge ended.

Throughout the weeks of preparing for the challenge we faced some tough decisions and problems.We learnt how to compromise and make our mechanism work the way we want it to.





We had a very fun and enjoyable experience.We like to thank Mr raja ,our lecturer for making this such a enjoyable module.
Thank You!

Week 15 The final update.

We have made some changes to our designs.During the fabrication on last week , we found out that our mechanism is too small compared to the others.Lucky we still had enough material to make a bigger mechanism.The designs remained the same , only the size was increased.

This is the updated Auto Cad drawings for our mechanism.As you can see , the length and width are much longer.

FULL:


Mechanism Plate:


Protuding Part:


Arm:


The fabrication of the new mechanism has taken place.


Cutting and drilling took place during lesson time on the 27th July.


As you can see the new mechanism is now 1.5x bigger than the first.This is to ensure that the claw is able to grab the can.


This is the end product after cutting and drilling parts of the mechanism.



We attached the servo horn to the claws by use a screw and a nut.This ensures that the two parts are held in place.


On Wednesday the 28th , testing of the mechanism took place. One part of the mechanism was used to determined the direction and the speed of the mechanism.We programmed it so that the claw would not crush the can.

We had some trouble with the programming as we need to program two servo motors.The left and right parts of the claw was suppose to rotate in an opposite direction.But it happen to go in the same direction.After a few adjustments we managed to program it with the right speed and the right direction.

AUTOCAD 2D DRAWING- updated again

Overall:


Part 1: Mechanism Plate


Part 2: Protuding Part


Part 3: Arm

Week 14 (Fabrication)

Full view:


1st piece of the mechanism: Mechanism Plate

2nd piece of the mechanism :Protuding part

3rd piece of the mechanism: The arm

Week 13 AutoCad (Updated) and Planning

Deleted some unnecessary dimensions , components now have a separate border :
Full View:

Left View:

Middle View:

Right View:


These dimensions have been confirmed.
Planning of components on the polycarbonate plate is in progress.


Cutting of the plate will take place on 20/7/2010.

AUTOCAD 2D DRAWING (MODIFIED)

Modified the dimensions of the arm and separated each part into individual borders.
This is how it looks like:

Part 1:


Part 2:


Part 3:

AUTOCAD 2D DRAWING

THIS IS THE AUTOCAD 2D DRAWING.



Before:


Updated version:


THE PARTS INCLUDE:
1)Both of the arms(Plan view)
2)3rd angle projection of the right arm
3)3rd angle projection of the protruding part
4)Mechanism Plate

*Modified:
Polycarbonate plate with individual parts from 2) to 4) inside its border.
Where to place them is not finalized and will be done on 13/7/2010. The fabrication of individual parts will also be done on the same day.