Machine Description

Our machine is very simple to understand. It consists of two essential modules: Tape Dispenser and String Arm. These two modules work together to slide a tape measure under the balls, lift them up, and form an incline to move the balls to the opposing slot. The details of the machine are described below.

Tape Dispenser Module:
This module consists of an aluminum framework, wooden box with wheels, tape measure, and motor assembly. This module is dedicated to holding the tape measure and extending or retracting the tape.

Aluminum Framework - This part is simply two sheets of aluminum plate spaced apart from each other with four aluminum posts. There are slots cut into the plate. The purpose of this part is to suspend the Wooden Box above the arena, mount the Motor Assembly, and provided a stable and secure platform for operation. This part also houses the control box.

Wooden Box - This part is constructed of four wood panels. Two wheels are pushed against each other inside the box with a set of springs. This part holds the Tape Measure in place between the wheels and allows the Motor Assembly to interface with the wheels.

Tape Measure - The tape measure itself. The end of the tape measure is cut off and curved so that it will move down the arena slot smoothly and follow along the walls.

Motor Assembly - The motor assembly is a Tamiya gearbox with a plastic gear. It's responsible for spinning the wheels of the Wooden Box, therefore causing the tape measure to extend or retract. It is mounted to the Aluminum Framework.


String Arm Module:
The module consists of a base plate, slot arm, motor assembly, and string spool. This module is responsible for pulling on the tape measure via the strings to help pull the tape through the arena slot. It also acts as a blockage to stop opponent robots from crossing over.

Base Plate - This part is a sheet of aluminum plate. It has a slot cut into it as well as L-bracket pieces mounted on the front. The Base Plate mounts all other parts of the String Arm Module and acts as a stable platform. The L-bracket pieces prevent opponent robots from moving through.

Slot Arm - This part is a welded tube made from steel plate. It is mounted to the Base Plate and extends down into the arena slot. It has has holes to allow the String to pass through. This part is designed to stop the tape measure at a certain height thus forming an incline for balls to roll into the opposing arena slot.

Motor Assembly - The motor assembly is a Tamiya gearbox with an aluminum shaft. It controls the retraction or extension of the string. It is mounted to the Base Plate.

String Spool - The string spool is Kevlar thread wound around the shaft on the Motor Assembly. The string itself is attached to the tape measure. The string runs through the Slot Arm as well.