Mechanical Design

Overview

The machine was designed with the following in mind:

Efficient manufacturing
- The majority of parts are laser cut Duron - a quick process requiring little machining expertise
- Other parts are 3D printed using free material
Ease of assembly
- The main structure is designed in puzzle pieces that can easily be put together and removed without hardware
Electrical integration
- Removable panels to allow access to the breadboards in the lower area
- Space to run wires to all moving parts and sensors

Component 3D Models and Drawings

(all drawings in inches)

Outer Housing

The outer housing is made of laser-cut Duron with puzzle piece fittings
Holes were cut for all other pieces to fit in
Extra planning for wire access was accounted for in cutouts
The final structure was glued together

Triangular Bridge

The triangle bridge was designed to fit on top of the flat laster cut bridge where the DC motor is mounted. It is sloped to prevent salad leaves from getting stuck on the bridge during the mixing process and fall into the bowl once the doors are open
The bridge consists of 2 asymmetrical parts (since the DC motor is mounted off center)

Hinged Doors

The doors are dimensioned to meet the following specifications:
- Long enough to hit the two switched and be reachable by the servo arm
- Width and placement to hit the bridge and close the salad container opening while also leaving enough room between the doors for the servo arm when in the open position

DC Motor Bracket

The DC motor bracket is 3D printed out of PLA
The bracket provides a housing for the DC motor and allows the DC motor to be securely attached to the Duron bridge via screws

Mixing Blade

The mixing blade was designed and 3D printed to fit the following specs:

sleek profile to prevent salad from getting stuck on it
press fit onto the DC motor shaft
angled blades to mix the salad thoroughly
as long a blade as possible that does not interfere with the bridge

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