Pltw Separate Marbles By Size

While working on design problem 3 3 1 our team learned many things in addition to developing greater understanding of vex pieces.

Pltw separate marbles by size. Marbles over an inch in size are called boulders and not are not allowed in standard games. Extra large marbles or marbles larger than 2 inches are rarely used in official games. Design 2 a hopper composed of vex components directs the marbles to a tunnel. Although it was effective at sorting out the metal marbles with a weighted ramp and took accurate sensor readings for the wooden plastic marbles our machine had two main problems.

Physical idea and concept sketch this idea allows us to separate the metal ball from the rest the heavy ball will fall into a cup while the other lighter ball will travel down the ramp. I wrote this code last year in pltw engineering. The metal marble was excluded by mass via a teeter totter system. Two motorized arms then isolate one marble at a time over a light sensor.

First the hopper and conveyor belt system we designed in order to avoid breaking the 1 motor 1 servo constraint did not always line the marbles up well on the belt. Marble sorter made completely of fisher technics pieces and some hot glue. Project lead the way provides transformative learning experiences for prek 12 students and teachers across the u s. We create an engaging hands on classroom environment and empower students to develop in demand knowledge and skills they need to thrive.

The pltw marble sorter is one of several vex projects we built in our poe summer training class. They are usually used by artists. The rotating cup bins then rotate to the correct position and the last arm lifts and frees the marble. We also provide teachers with the training resources and support they need to engage students in real world learning.

This system will allow for us to have the marbles roll down a ramp and get released one at a time to go through other parts of the marble sorter. The glass marble was excluded via diameter using an incrementally increasing rail distance it drops through. Size examples 12mm is about 1 2 inch across very small 14mm is the size of a traditional chinese checker game 16mm is about the size of a dime the size of a player marble 25mm is about the size of a quarter the size of a shooter marble 35mm is about the size of a 50 cent piece 42mm is about the size of a silver dollar 50mm is about 2. It sorts metal marbles out by weight first and the black and clear marbles get sorted by size into separate hoppers.

This code is written in robotc and sorts marbles of five types wood white plastic off white plastic metal and glass.