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Coil and Rotary Machines! What are they Really? — Carson Hill

Coil and Rotary Machines! What are they Really?

[05:22]  “[Rotaries] are spinning, and [coils] are oscillating. The spinning motion of a rotary needs to be translated into oscillating motion. And that’s one of the main challenges, because ultimately we want oscillation  which is what coils do by default.”

— Carson Hill

Coil Machines are basically an open circuit. They have two bobbins wrapped in copper wire turning them into coils. When you add electricity from the clip cord it sends a current through the machine and turns the 2 coils into an electromagnet pulling the armature bar down towards the coils. Then the current is released and the armature bar returns. This happens over and over in rapid succession.

A Rotary Machine on the other hand can vary drastically from one manufacturer to another. But, the main driver of the system is a rotating motor with a single coil inside. The motor is attached to a drive shaft which spins a cam wheel. In order for the motor to function properly the cam must make one full rotation. This last point is very important because it’s one of the defining factors that makes one machine more efficient than the other. 

Depending on whether you have an “L” shaped rotary or a “Pen” style rotary is where the differences in cam systems and mechanisms start to occur.

  • L Shape - The motor is positioned sideways and the needle bar is attached directly to the spinning cam, this creates the up and down motion for the bar.
  • Pen Style - The motor is positioned vertical, and the cam will have some type of pin, grooved plate, or magnet that pushes a plunger bar into the plunger of a needle cartridge to extend the needles.

As I said before rotary machines vary widely between manufacturers so it may be good to look into how your machine works.

Watch the full episode: 

Tattoo Gear: The Problem With Rotaries Carson Hill EP 238

submitted on 02.21.24

Improve Quality & Extend Life of Old Tattoos by Pushing Contrast - Jake Meeks

Improve Quality & Extend Life of Old Tattoos by Pushing Contrast

“In 5, 10, 20 years how much of that red pulls back out? How much will the darks in the turtle kind of mute out? Does the turtle fall back in the distance? Only time will tell.”

- Jake Meeks

Everyone knows that when you do these types of reworks or cover-ups seeing it fresh can be a bit deceiving. Generally you’re going to be able to bump something up or back about 10-20% at a pass so just be aware that when you’re diving back into old tattoos that what the client walks away with isn’t necessarily going to stay that vibrant or fresh. Sometimes colors will push back forward like really warm reds, so reworks can take a little bit of extra time to really push those elements into a better direction.

six months healed

It’s always good to make sure you’re in good contact with the client to get updated pictures so that you can see what might need a little more attention. Even if you do get the chance to jump back in and really do some finishing adjustments, be aware that you might only get about a 50-60% difference in the final result.

Watch the full episode:

Tattoo Techniques: Covering Dark Ink With Light Fireside Technique EP 26

submitted on 02.19.24

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