Destin of Smarter Every Day will learn about Tattooing in this video, he plans to film it on a high-speed video camera, Leah a tattooist shows Destin the Rotary Machine and the most commonly used type is a coil rotary machine.
The needle used in tattooing is not a single needle, but multiple needles and they are grouped for lining, however, for shading, it’s more like a paintbrush. Ink is held in between those numerous needle points using capillary action, and when it punctures the skin, it drags the ink down into the dermis.
Rotary machines are pretty easy to understand. Here this motor has rotational motion, and it’s translated into linear action here at the needle bar.
When Leah steps on this foot pedal, that direct current is applied to the two coils. This turns those coils into an electromagnet, and it pulls this armature bar down, moving the needle. When the armature bar runs down, it breaks the circuit away from the contact screw, and that causes the electromagnetic field to collapse. The spring then returns the armature and it re-energizes the circuit. This just happens over and over again, and that’s it. That’s how a coil machine works.