Embedded Files
Design:
Design:
Our project relies on a linear motion system comprised of a spatula controlled by stepper motors with mounted servo motors to provide rotation. We kept our objective of low cost in mind as we designed our project and therefore designed for cheap manufacturing processes (like using Jacobs' 3D printers, laser cutters, and waterjets) and avoided designing components that would require intensive machining.
We bought actuators and sensors in their most basic forms from Amazon and Jacobs and assembled, calibrated, and integrated these components into the rest of our design. We present a project that is designed, manufactured, and assembled almost entirely by ourselves.
Manufacturing of Components:
Manufacturing of Components:
All manufacturing was undertaken in the makerspace of Jacobs Hall, making use of Type A 3D printers, Universal Systems laser cutters, the metal shop, and the electronics lab. Below we list main components of our project with relevant specs, along with some motivation as we to why we chose that particular product. To learn more about each component, simply follow the link accompanying each description.
- Capable of temperature control
- Small size makes it compatible with our design
- Inexpensive and plugs into regular outlet
- 0-5 kg range
- Strain based gauge
- Requires amplifier for Arduino compatibility
- Cheaper than comparable scales
- Russian birch wood
- High strength to weight ratio
- Laser cut out of 1/4" thick plywood in Jacobs Hall
- Rapid and high precision manufacturing
- Used Omax Waterjet to cut out 2D profile of spatula
- Bent into shape using sheet metal bender
- 1/16" Mild steel; cheap and thinnest available
- Used L-brackets to connect to servo (see below)
- Laser cut additional connector out of plywood (see below)
- 2 Futaba S3003 servo motors
- 4.8-6 V operation
- 0.19 sec/60 degree rotation at no load
- 4.1 kg.cm torque at 6 V
- At 6 V operation, capable of flipping average chicken breast with "safety" factor of 1.6
- 2 Nema 17 stepper motors
- 200 steps per revolution
- 5% step accuracy
- 59 N.cm holding torque
- Combined with belt in order to move cart on gantry
- Capable of linear motion accurate enough for our project without additional feedback control
- Easily programmed microcontroller
- Capable of both digital and analog control
- IR object detector
- 2 built in potentiometers allow for variable range and sensitivity
- Detection distance of 2-40 cm
- Arduino compatible
For a full bill of materials, please see below:
Report abuse