Tape Shot vs. Optical Nozzle Centering: Which Is Better?
A practical comparison of the tape-shot method and camera-based optical centering — speed, accuracy, repeatability and cost.
Every fiber laser shop has to center the beam in the nozzle regularly. For years the standard answer was the tape shot. Today, optical centering systems offer a measured alternative. Here is how the two compare in daily use.
How the tape shot works
Transparent tape is placed over the nozzle, the nozzle opening is pressed into it, and a low-power pulse burns a small hole. The operator compares the hole with the nozzle ring, adjusts the head, and repeats with fresh tape until the hole looks centered.
How optical centering works
An optical system such as the Raytech nozzle centering system mounts onto the nozzle with an adapter, plugs into an Android phone and images the cutting head’s red pilot light — the cutting laser is not fired. The app shows the light as a red dot on a target; the operator turns the centering screws, watches the dot move and gets a notification when it reaches the center.
Side-by-side comparison
| Criteria | Tape shot | Optical centering |
|---|---|---|
| Feedback loop | Shoot → remove tape → inspect → adjust → repeat | Adjust and see the result instantly |
| Laser firing | A pulse for every attempt | None — red pilot light only |
| Small offsets | Hard to see | Visible as the dot’s distance from center |
| Operator dependence | High — everyone reads marks differently | Low — same criteria for everyone |
| When you are done | When the burn mark “looks” centered | The app notifies you |
| Consumables | Tape for every shot | None |
| Power | — | Battery-free, powered by the phone |
| Upfront cost | Almost zero | One-time device purchase |
The hidden cost of the tape shot
The tape itself is cheap. The real cost is machine downtime and inconsistent results. Every extra round of shooting and inspecting keeps an expensive machine idle, and a beam that is “almost centered” can quietly reduce cut quality, increase dross and wear nozzles faster — costs that never show up as “centering” on a report.
Which should you use?
- Occasional, single machine, experienced operator: the tape shot can still do the job.
- Several machines, multiple shifts or operators: optical centering gives everyone the same, measurable result.
- Service companies and machine builders: a portable optical system with adapters for different heads speeds up every service visit and gives the same result on every machine.
Looking for a tape shot alternative? See how the Raytech system works or request a quote.
Related guides
Stop guessing. Find the center.
Tell us your cutting head brand and model — we confirm the right adapter and send a quote with shipping to your country.