ARTEMIS is an all-girls robotics team from Abbotsleigh Senior School in Sydney, Australia. ARTEMIS currently has students from Years 7-11 competing in both the FIRST®LEGO® League (FLL)and the FIRST®Robotics Competition (FRC). Our mission statement is “STEM for a fairer world” and we try to embody this in everything we set out to do.
This year’s FRC game Power Up was based around robots delivering cubes to different areas on the field to score points. The vault is an area on the end of each field where cubes are delivered to earn points and gain powerups, the switch is a short seesaw like contraption where points are given to the team who has it tilted in their favour, and the scale is similar to the switch, but much taller. Our robot this year has a pneumatic controlled gripper intake with compliant wheels and a two-stage elevator that could lift the cubes to well over 2 metres. This means that we can place cubes into the vault and onto the switch.
To build our two-stage elevator, initially we only had access to linear slides that were half the height we needed, and half were the igus drylin N type slides, which are not as strong as the larger drylin W slides. Treotham kindly provided 4 lengths of 1.2m drylin W slides and carriages. Using AutoCAD Fusion 360, we completed a nested elevator design with the slides that would lift the intake mechanism holding the cube to well over 2m. A geared 300W winch using 3mm cable lifted the elevator through a series of pulleys to the top position. Even through the intake mechanism and cube were a considerable overhanging weight on the slides, we were able to run our lift incredibly smoothly and use gravity to return it to the bottom. Treotham also provided us with 4m of energy chain so that we could manage the wires and pneumatic lines we needed for our intake as it moved to its full height and back.
At the competition, we were very grateful that the lift and igus drylin W linear slides worked flawlessly, allowing us to successfully run the robot and place the cubes onto the scale, our biggest goal for the season. We had a few issues with the autonomous period operation, but we scored cubes into the vault and high switch to make up for it.
For the upcoming off-season competition in July, we plan to mount a hook and additional winch to our lift so that we can lift the robot off the ground during the endgame to gain even more points. We are confident that the drylin W slides will be strong enough to pull the robot up. Our software team is also hard at work to improve our autonomous code to use the gyro and encoders we have installed. The Year 11 students of our team are also currently creating a second, high speed robot called Artemoose for the event.
We very much appreciate the generosity of Treotham that enabled us to build our most successful and reliable robot to date. The igus drylin W slides were excellent to work with and ran flawlessly during the competition. The e-chain made our cable management successful, as this was something we were worried about with such a large 2m movement.
By ARTEMIS Team 5876
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