After testing all the basic functions of a robot in previous post, a nice additional feature of a robot is to include a hand gripper.
You can purchase a pan & tilt kit for standard servo and a hand gripper kit which you can combine to create a nice pick-grip-release motions.
For hand gripper, you only need one mid-size servo attached to tilt kit for up and down rotations, and another servo to control the actuall gripping movement.
Basically you can pre-set the angular position of the tilt servo:
- 90 degree: Neutral position
- 110 degree: When it goes down to pick up an item
- 70 degree: When it goes up after gripping an item
As an alternative, you can also attach a camera instead of a claw. Let’s go and build the gripper!