DEWBOT II Mechanical

AutoCAD Model of DEWBOT II Scoring System

DEWBOT II's scoring system is designed to:

1. Score by shooting balls into the central high goal
2. Alternatively score by schooting balls into the low side goals
3. Collect balls off the playing field to reload the Shooter's storage hopper

Beater Bar

A high-speed (ungeared Mabuchi RS-545SH2485 on a speed controller) front Beater Bar caught balls and drove them back to the Ball Lift. The Beater Bar also prevented balls from being lost during robot reverse drive. A pair of guides directed the balls into the Ball Lift entrance.

Ball Lift

The Ball Lift is a vertical conveyor tower having a pair of conveyors: Left and Right.

Each conveyor comprises:

• (5) 3/8" OD latex tube "cords"
• (7) conveyor rollers
• A Globe Motor direct drive of the bottom-most roller
• A spring tensioner on the top-most roller

The two driven bottom-most rollers are angled 3° relative to the other rollers, providing a wider opening at the entrance of the Ball Lift thereby allowing easier ball entry.

The two spring-loaded top-most rollers are separated further appart than the other rollers, loosening the conveyors grip on the balls as a deflector pushes the balls forward into the hopper.

The

Strengths

• Reliability
• Flexibility to target either High or Low goals
• Easy ball collection

Weaknesses

• Low rate of fire
• Difficult and slow to aim
• Small hopper capacity
• Low Shooter position was easy for opponents to block
• Low scoring