Motion Mechanics
Lifting the Bucket
For motion mechanics assignment I started out by figuring out the gears which is something i have always heard about but never really tried to make one in real. It sounds easy but it isn’t at least in my case. So, my main aim was to make it work and figure out the parameters that need to be considered. Hence i made “lifting the bucket”
How its made..
Materials used:
- MDF 0.5″ thick
- rounded wooden sticks (for axes)
- bucket
- string to tie the bucket with
- glue gun
- rubber spacers and washers to avoid friction
- motor
Equipment: CNC milling machine
Procedure:
Design the gears using the gear plugin in Rhino (makes life much easier). In the plugin Rhino will make gears according to the specifications you give keeping in mind to have the gear teeth to match with the other gears created you need the pitch circle to be the same for all of them which is the distance between each tooth of the gear. For my gear design i controlled the pitch circle and the number of teeth. Before i had cut my design in CNC i tired cutting it in a thin cardboard using laser cutter just to make sure it would work.
The gears were assembled and powered by the motor.
Lesson learnt:
- The connection between the motor and the gear could have been done better. As for this one the motor wasn’t in contact fully with the gear and also the torque wasn’t enough to move the gears.
Improvements– the Gear – motor connection could be improved by laser cutting the D shape of the motor on to ac acrylic or other material and then glued or screwed on to the main gear.