Lakeville bot-builder gears up for regional competition

Lakeville bot-builder gears up for regional competition

William Sellery, of Lakeville, tests his robot ahead of the Eastern Pennsylvania Regional competition scheduled for April.

Patrick L. Sullivan

LAKEVILLE — During his spring break, William Sellery, a senior at Mercersburg Academy in Pennsylvania, spent hours inside the Methodist Church hall in Lakeville testing and troubleshooting a competition robot.

Sellery, the captain of Mercersburg’s robotics team, was preparing for the Eastern Pennsylvania Regional competition — a key qualifying event for the international championship scheduled for April in St. Louis.

On Thursday, March 12, he put the robot through its paces on a practice course that filled most of the church hall.

He directed the robot to a structure holding brightly colored, multi-sided objects slightly smaller than a softball.

The robot first gathered the balls using a complicated system of wheels.
“And a lot of rubber bands and zip ties,” Sellery said.

The robot then moved to the structure — an elevated, narrow rail — and deposited the balls.

Using an arm extending from the side, the robot pushed the balls along the rail and back to the floor.

Satisfied with the maneuver, Sellery turned to a laptop, explaining that he was fine-tuning the code that allows the robot to function autonomously.

Sellery said each team has four members. The drills last a couple of minutes, and team members have specific tasks — such as calling out directions to the person controlling the robot about where it should go next.

The Eastern Pennsylvania Regionals Sellery had been preparing for were held last weekend. Sellery said the competition “is the last stop before the international competition.”

Sellery also detailed the inner workings of the robot. He had an array of batteries charged and ready to go, each lasting about four minutes of nonstop use.
“There are eight motors in the robot, so the batteries go pretty fast,”he said.

The robot also includes two pneumatic devices that require air pressure. Sellery used a small, handheld air compressor to charge them to 100 pounds per square inch (psi).

Sellery said judges closely monitor the pressure. Going over the 100 psi limit results in disqualification.

Sellery has been interested in robotics since participating in a Salisbury Recreation LEGO robotics event at Town Hall in 2015.

He said the competition gets hectic, and that’s fine with him.
“The most stressful moments I enjoy the most.”

Sellery reported Sunday evening, March 15, that the team’s performance at the regional competition was “not amazing.”

“We ran into some mechanical problems” and placed 40th overall.

But there was some good news.

“We also got an interview from a major YouTube channel,” FUN Robotics, and the team found out they received a judges award after they left.

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