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Raspberry Pi Robotic Blueprints by Richard Grimmett

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Simple drawing using the robotic arm

You can now ask your arm to hold a drawing pen by simply opening the claw, inserting a pen, and closing the claw. You'll probably want to use some sort of marker or other drawing device with a wide tip and lots of color. The following is the arm holding the pen:

Simple drawing using the robotic arm

If you adjust the servo that moves the entire arm up and down, you can make the pen touch the paper, as follows:

Simple drawing using the robotic arm

Finally, if you move the servo that turns the base, you can draw your first curved line, similar to the following image:

This is wonderful, but ...

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