CAD Renderings: Caelan Koch

Ergonomic Analysis

Original Design: Vollrath 47700 Chrome Plated Cheese Cutter w/ Aluminum Roller

Pressure / Pain Points:

• Unnatural wrist flexion and ulnar deviation

• Connection between grip and hands

Design Requirements:

• Determined handle length (95 mm) to keep contact between fingers and tool (no palm)

• Handle diameter - greater grip force and stability

• Tool shape and materials should be no slip and contoured/shaped to be held comfortably

Table: Team Effort

Force Analysis Drawings: Liv Alyn

Sketches: Caelan Koch

Refined Design Sketches: Caelan Koch

Foam Core Handle Models

Final CAD Model

Foam Core Handles: Caelan Koch

User Testing

User Testing: Team Effort

Full Foam Core Hand Models: Caelan Koch

Final Model Design: Team Effort

Final CAD Rendering - Liv Alyn

Design Sketches

Final Foam Model Design

Refined Design Sketches

What Worked

1. Bulbous handle

2. Keeping the handle at an angle (minimal wrist deviation)

3. Cutter at an angle away from the handle (90°

What Didn’t Work

1. Design of models weren’t intuitive

2. Caused some unnatural movements

“I like [the models] to be as compact as possible.” - User 1

“4 and 3 were my favorites, 4 because of the bulb, and 3 is just comfortable, and the angle of the handle makes it easier.” - User 1

“5 I didn’t understand how to use, and it put me too far away from the cheese.” - User 1

“4 and 2 were my favorites, because they were the easiest to use, the handle length was a little bit short, but otherwise they put the least amount of strain.” - User 2

“Number 5 was really straining my wrist, and was very big.” - User 2

“My problem with some of the models was that they put my hand at a weird angle.”
- User 3

Full Foam Core Models