20. Project presentation¶
Document a final project masterpiece that integrates the range of units covered, answering:
What does it do?
Who’s done what beforehand?
What did you design?
What materials and components were used?
Where did they come from?
How much did they cost?
What parts and systems were made?
What processes were used?
What questions were answered?
What worked? What didn’t?
How was it evaluated?
What are the implications?
What does it do?¶
Recreates the vestibulo-oculomotor reflex
Who’s done what beforehand?¶
I think there is no similar project
What did you design?¶
The design consisted of three components grouped based on the software used:
The face and eyes with Blender
Internal component support and external main support With Fusion 360
The integrated circuit with Eagle Fusion and FlatCam
What materials and components were used?¶
For the fase: PLA PLUS and for the eyes the Resin (3D Printer Curable Resine)
For the internal supports: I used 3 mm MDF wood and PLA plus.
For the main external support: I used 13mm laminated wood
For the integrated circuit the copper plates and welding of the components with tin
I used a MPU 6050 sensor and two sg90 servo motors
For the rotary motion I used a ball bearing embedded in a circular plastic that was originally made for a pulley
Other materials:
white synthetic Paint cost $30
wood screws
Glue for Wood
Where did they come from?¶
All elements were obtained from the laboratory with the exception of the MPU6050 sensor
How much did they cost?¶
For the fase: PLA PLUS and for the eyes the Resin (3D Printer Curable Resine)
A full 1.75mm PLA plus thread costs $20
High Precision UV Curing 3D Resin costs $31
For the internal supports: I used 3 mm MDF wood and PLA plus.
12 pieces of MDF Wood of 12 x 24 inches of 3 mm costs $39
For the main external support: I used 13mm laminated wood
A 3 x 1.5 meter piece of 15mm thick plywood costs approximately $20
For the integrated circuit the copper plates and welding of the components with tin
One copper plates cost $5
I used a MPU 6050 sensor and two sg90 servo motors
MPU 6050 sensor cost $10
Servomotor sg90 cost 2$
For the rotary motion I used a ball bearing embedded in a circular plastic that was originally made for a pulley
One ball bearing cost $8
Other materials:
white synthetic Paint cost $30
wood screws
Glue for Wood
Materials such as PLA plus, Resin, wood, copper plate were materials shared with other projects, which could correspond to 1/5 of the total value.
The materials that I did have to acquire and absorb the expense were: the MPU 6050 and the synthetic white paint.
The microcomponents do not have a very high cost and considering their variety I do not see the need to detail them
What parts and systems were made?¶
The face, the eyes, the internal and external supports and the integrated circuits with their connections were made with material and equipment from the laboratory.
What processes were used?¶
2D and 3D design
Laser cut
Additive and subtractive fabrication processes
Electronics design and production
Microcontroller interfacing and programming
System integration and packaging
What questions were answered?¶
Yes, it is possible to represent the vestibulococulomotor reflex through digital manufacturing
What worked? What didn’t?¶
It was possible to represent the reflection in relation to the opposite movement of the eyes in a rotation angle similar to that of the sensor, but not in speed, noticing a small delay in the movement of the eyes, very subtle.
How was it evaluated?¶
Visually, which is how the reflex is assessed in a general ENT practice
What are the implications?¶
I am very satisfied with what I got, although improvements still need to be made. By showing my colleagues making a very good impression and I intend to use it for teaching and research purposes once I achieve my following purposes:
Improve the speed of the servo motor to the point that the movement of the eyes during the rotation of the head is not perceptible
Using two sensors instead of one to further simulate human anatomy
Increase the number of servomotors to make the movement of each muscle related to the reflex independent.
The development of my project can be seen here