Foundational Learning Fluid power transmission Pressure / force / area relationship Pushing vs. pulling (you can’t “pull”) How pushing force and distance affect moment (torque) Effect of pushing at an angle when calculating moment Key Terminology Area: a measurement of surface. Cylinder: the outer container of a fluid power actuator. Degrees of freedom: the number of axes upon which a device may move or rotate. For example the human arm has seven degrees of freedom: three at the shoulder joint, one at the elbow, and three at the wrist. End effector: the tool at the end of a robot arm that accomplishes the desired task. Often used to grasp objects, it may be any type of tool, including a spray gun or welder. Moment: a twist, or torque, created by a force acting at a distance from a pivot point. Piston: the sliding component inside a cylinder. Pressure: a force distributed evenly over a surface. Force: a push or pull upon one object exerted by a second object. Estimated Time Total time 8–12 hours: 2–3 hours of lesson time 5–7 hours of build and testing time 1–2 hours of activity/competition time Recommended Number of Students Two students per arm to a maximum of 20 students, based on BC Technology Educators' Best Practice Guide If time and resources permit, having each student build their own robot arm allows them to take the arm home at the end of the activity. Facilities A multipurpose tech studies shop or lab with access to: Drawing or sketching resources Drills (ideally drill presses)
Foundational Learning Fluid power transmission Pressure / force / area relationship Pushing vs. pulling (you can’t “pull”) How pushing force and distance affect moment (torque) Effect of pushing at an angle when calculating moment Key Terminology Area: a measurement of surface. Cylinder: the outer container of a fluid power actuator. Degrees of freedom: the number of axes upon which a device may move or rotate. For example the human arm has seven degrees of freedom: three at the shoulder joint, one at the elbow, and three at the wrist. End effector: the tool at the end of a robot arm that accomplishes the desired task. Often used to grasp objects, it may be any type of tool, including a spray gun or welder. Moment: a twist, or torque, created by a force acting at a distance from a pivot point. Piston: the sliding component inside a cylinder. Pressure: a force distributed evenly over a surface. Force: a push or pull upon one object exerted by a second object. Estimated Time Total time 8–12 hours: 2–3 hours of lesson time 5–7 hours of build and testing time 1–2 hours of activity/competition time Recommended Number of Students Two students per arm to a maximum of 20 students, based on BC Technology Educators' Best Practice Guide If time and resources permit, having each student build their own robot arm allows them to take the arm home at the end of the activity. Facilities A multipurpose tech studies shop or lab with access to: Drawing or sketching resources Drills (ideally drill presses)
12aRobotArmChallenge.docx