EV3CLAW was originally meant to be a robotic arm… It didn’t work out as planned. But it still is something! A robotic claw! The actual claw is at the end of EV3CLAW; a medium motor powers a worm gear, which turns a 24z gear, which turns a 12z gear, which interlocks with a 16z gear and closes the claws. You can see how the mechanism works and how it picks up objects. Enjoy!
Access the video here: EV3CLAW