The OHS Tamworth Titans had their first foray into robotics competitions last year, when they surprised even themselves by taking out a Sydney competition and have never looked back.

For this competition the Titans were given just six weeks to build a 50kg robot, that could semi-autonomously deliver a series of 13 inch balls and a 19 inch hatch onto a rocket ship.

Each team joined with two others and entered a game of three on three in an arena at Sydney Olympic Park according to maths, and now robotics, teacher Josh Vigar.

"The balls were our speciality, and in our best matches we were one of the best sides there," Mr Vigar said.

"Unfortunately we had a lot of mechanical errors - we threw a few belts and even had a roll-over which didn't help - but it was a very good competition." 

Over 40 schools took part in the competition, including 15 international sides from China, Vietnam, Taiwan, Singapore and New Zealand, as well as several Sydney private schools.

Each school begins with the same base kit, although are then allowed to spend up to US $5000 on parts to complete the mission.

"Some of the international teams, particularly the Chinese were phenomenal," Mr Vigar said.

"We would have spent less than US $1000 on our robot, and still did pretty well to place 25^th overall - it was not the best result but we know we can improve."

The Tamworth Titans will now begin preparing for the Australian inter-schools challenge in July, "which is a bit more laid back", and have also been invited to a competition in Taiwan.

Meanwhile this year if the first time the school has offered robotics as a subject, with both the year seven and eight classes filling up instantly.

"I think we will have about 15 robots out of those classes at the next competition, which will be very interesting," Mr Vigar said.