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After a few minor tweaks, a coil tattoo machine can be completely different. The speed of cyclization, its impact, and run smoothness depend on the thickness of the spring and the gap of the screw with the armature bar, as well as the weight of the armature bar.
Tattoo artists can save a lot of time by knowing these relationships and avoiding trial and error with different components. While a fast liner setup might be perfect for fast lines, it may be too aggressive to shade, and a softer setup may not be fast enough or snappy enough for lines to create the crisp look you're looking for.
This is a basic reference to the primary tuning variables.
The Basics of Coil Machine Tuning
A coil machine operates based on an electromagnetic cycle. The coils do the drawing action when they are energized, causing the armature bar to move downward. Then, the springs move the armature bar back to its original position, breaking the electric contact, and the process is repeated.
The action of the machine is dependent on the relationship between:
· For the front springs, the thickness and stiffness.
· Increase depth and firmness at the back. Thicken and firm the back side.
· The position and gap of the contact screws
· Armature-bar weight
· Coil configuration
· Machine voltage
· Needle configuration and cartridge setup
Because one change can impact the system as a whole, changes should be made in a systematic manner.
Adjust the Front Springs to Control the Machine's Response
The front spring is located on the contact-screw side of the armature bar. It has a significant effect on the machine's motion and adaptability.
The thicker or stiffer the front spring, the more resistance to movement. This can help to produce a more powerful, more controlled shot, and can be beneficial if you need a machine to stop strongly.
Having a thinner front spring makes it easier to move around and can give the machine a more responsive and flexible feel. But it's not all about the thickness of the spring. The best configuration will depend on the other machine.
Practical Troubleshooting
If a machine is too aggressive:
· If you are using the front spring for an activity, check to make sure the spring itself is stiff enough for your needs.
· Inspect the gap between the contact screw.
· Check the weight of the armature bar.
· Make sure the machine isn't being driven at unnecessarily high voltage.
When the machine seems weak or unresponsive, the spring might not be the issue. Other factors that can play a part are electrical contact, coil performance, alignment, and voltage.
To Influence the Speed and Recovery of Back Springs
The back spring is used to return the armature bar after being pulled towards the coils. Hence, its stiffness plays a significant role in the behavior of the machine during cycling.
A firmer back spring can make the machine stiffer and help achieve a more controlled feel.
A lighter or thinner back spring will enable the armature bar to swing around more, which can result in a softer, more responsive feel. That's why artists tend to try out more combinations of springs when they're converting a machine from one type of lining to shading. The purpose is not merely to make the spring as stiff or as soft as it can be. On the contrary, you're attempting to achieve a balanced move that is similar to your technique and the job.
Small Adjustment, Big Difference
The contact screw controls the operation of the electrical circuit. One of the most crucial tuning points is the distance between the contact screw and front spring.
A smaller gap may cause the machine to cycle differently from a larger gap and could lead to greater responsiveness. There will be a change in the timing and feel of the machine if the gap is increased.
Generally, it is better to make small changes rather than big changes.
When troubleshooting:
1. Make a single change at a time.
2. Test the machine.
3. Listen and listen out for uniformity in the sound.
4. Record what changed.
5. If it is worse, go back to the last setting.
Don't rely solely on sound. Fast-sounding machines are not necessarily operating correctly for the application.
Armature-Bar Weight: Fast vs. Heavy
The armature bar acts as the moving mass in the machine. Its weight will directly impact the feel of the machine.
A lighter armature bar will need less power to activate and can help to improve the responsiveness and speed of your set-up.
The heavier the armature bar, the greater its momentum. It may help to create a more powerful, more purposeful gait, but will take more energy and may be slower.
This gives an important tuning concept:
Heavier and harder is not necessarily better, and lighter and faster is not necessarily better. A responsive configuration could be useful for a liner, and a smoother, less aggressive movement for a shader.
How to Convert a Hard Liner into a Softer Shader?
If your machine is set up for a hard-hitting liner and you desire a softer configuration, then the solution is to configure the machine in a different manner.
Do not change all the variables simultaneously, but rather one by one.
You might investigate:
1. A lighter spring or less stiff spring combination
2. A different gap between the contact-screws.
3. A hand-selected armature-bar weight.
4. Reduce operating voltage (if applicable)
5. A setup that allows for a more natural ride.
The aim is to minimize unnecessary impact whilst keeping needle movement consistent. Excessive force will make the machine feel uncomfortable and may make saturating controlled more difficult. A smoother machine will provide more control over the gradual passes by the artist.
Troubleshooting Common Problems
Machine is Running Too Fast
Check:
· Contact-screw gap
· Spring combination
· Armature-bar weight
· Voltage
· The condition of the coils and contacts. The state of the coils and contacts.
Machine Hits Too Hard
Look at the springs and armature-bar arrangement and determine if too much momentum and resistance are generated. Be sure that there is not too much voltage.
Machine feels sluggish
Look for excessively stiff springs, heavy armature bar, lack of electrical contact, and mechanical friction.
Machine runs inconsistently
Look for:
· Loose connections
· Dirty contact points
· Poor spring alignment
· Incorrect armature-bar alignment
· Differential pair noise, noise from coils or capacitors.
· Worn components
A machine that is experiencing a mechanical or electrical problem should not just be "tuned" around the problem.
For the Best Coil Tuning, Consider the Following Tips:
Variations (change one variable at a time). When both springs are replaced, the contact gap is changed, and the voltage is changed, at this point you will not know which change resulted in which change.
Keep notes. Write down the thickness of the spring, location of contact screws, type of armature bar, voltage, and application.
Make gradual changes. Small adjustments can make a big difference when it comes to the performance of a coil machine.
Tune for the job. A liner and a shader do not have to have the same characteristics.
The key to coil tuning, like everything in life, is balance. The front springs dictate response, the rear springs dictate recovery, the contact-screw spacing changes the timing of the electricity, and the weight of the armature bar determines the amount of inertia the electromagnet has to overcome.
The difference between a quick, stiff liner and a plushy yet controlled shader can be amazingly subtle. The trick is to know what each adjustment does, to make them thoughtfully, and to be prepared to test and write down all the results.
Once you stop thinking of it as voodoo and begin to think of your tuning as adjustments to a balanced mechanical/electrical system, troubleshooting becomes almost intuitive and finding your machine's sweet spot becomes easier than ever.
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