Why VertiGo Uses a 38W RF CO₂ Laser for Glass Engraving?

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The VertiGo RF 38W system has more than enough capability to process glass products effectively. To understand this decision, it is important to look at the physics of glass engraving and the practical requirements of the market.

1. The Nature of Glass Engraving

Glass engraving is fundamentally the process of controlling micro-fractures on the surface of the material.

When too much energy is applied, the following issues occur:

• Large fractures
• Rough surfaces
• Edge chipping or cracking

This is where RF CO₂ technology provides a clear advantage.

2. Advantages of RF CO₂ for Glass

2.1 More precise energy control

RF lasers allow very accurate pulse control through:

• High-frequency PWM
• Short pulse modulation

This significantly reduces heat accumulation on the glass surface, which is critical for achieving clean engraving results.

2.2 Smaller and cleaner laser spot

RF tubes typically offer better beam quality than DC-excited CO₂ tubes.

A higher beam quality results in:

• Smaller spot size
• Sharper engraving details
• More uniform surface texture

2.3 Reduced cracking and surface damage

With DC CO₂ systems, glass engraving often produces:

• Edge chipping
• Snowflake-type cracking

RF systems greatly reduce these issues because the laser output can be modulated much more precisely.

2.4 Stable power control at high speed

RF lasers respond extremely quickly.

Even at engraving speeds of:

• 800 mm/s
• 1,000 mm/s

the laser power remains stable and synchronized with the motion system, avoiding power lag or over-burning.

Ideal Applications for VertiGo RF

The RF 38W system is particularly well suited for rotary glass applications such as:

• 360° curved engraving on drinking glasses
• Premium liquor bottles
• Custom whiskey glasses

This approach is similar to the systems used by high-end brands such as Trotec and Epilog.

3. Why We Do Not Use UV Lasers on VertiGo

While UV lasers have certain specialized applications, they present several disadvantages for this type of machine.

3.1 Significantly higher laser cost

VertiGo RF currently has a better distributor price around, and dealers can comfortably sell it at around $8,000, making it a strong and profitable product.

A UV version of VertiGo would raise the base cost substantially:

• ~ $6,000 for a 5W UV
• $2,000 additional cost for 10W UV on top of  $6k

This makes the final machine price much harder for distributors to position in the market.

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3.2 Much lower processing power

Typical UV systems are:

• 5W (air-cooled)
• 10W (water-cooled)
  

This power level is far lower than the 38W RF CO₂ system.

Lower energy results in much slower processing speeds, which would significantly reduce the working efficiency of VertiGo.

3.3 Sensitivity to Surface Flatness

UV lasers have a very small focal spot and shallow depth of focus.

While this enables extremely fine marking, it also means the system is much more sensitive to surface variations.

If the surface is slightly uneven or the focus is not set correctly, it can easily result in:

• Loss of focus
• Inconsistent engraving depth
• Variation in marking quality

For users without sufficient experience in parameter tuning and focus adjustment, this may lead to consistency issues during production.

In fact, many UV machines currently available in the market under $5,000 experience similar limitations when engraving real-world products.

For this reason, we do not plan to apply UV lasers on a gantry-based VertiGo platform.

Instead, UV technology is better suited for galvo-based systems, such as our Viper series, where the optical system is optimized for precision marking.

Why We Do Not Use CO₂ Galvo on VertiGo?

For similar technical reasons, we also do not apply a CO₂ galvo system on VertiGo.

When engraving cylindrical objects with a CO₂ galvo system, the laser spot becomes significantly distorted toward the edges of the scan field.

This leads to:

• Enlarged spot size near the edges
• Reduced engraving consistency
• Uneven marking results on curved surfaces

Because VertiGo is specifically designed for rotary engraving on cylindrical objects, maintaining consistent spot size across the entire engraving area is critical.

Using a gantry-based RF CO₂ system ensures uniform engraving quality around the full circumference of the object.

3.4 Long-term stability concerns

Air-cooled UV lasers are still not fully stable for long-term industrial use.

Extended operation can lead to:

• output instability
• increased service requirements

This introduces potential after-sales risks that are not aligned with our product philosophy.

Our goal is for VertiGo to be a machine that customers can use reliably for 3–5 years without major issues.

3.5 UV glass engraving serves a different purpose

UV lasers are typically used for subsurface or internal glass engraving, which is a different application category.

For that type of processing, we already offer our Viper series (Model #: Viper M6U5 shown in picture below), which is designed specifically for those tasks.

4. Our Product Positioning

For VertiGo, we will continue to focus on the 38W RF CO₂ configuration, which provides:

• Optimal speed
• Consistent engraving quality
• Strong reliability
• Easy handling the cylinder objects
• Best ROI in this category
• Only product in the world
• Retail Space Display
• Better market pricing for distributors

This combination makes VertiGo a practical and profitable solution for rotary glass engraving.

Conclusion

In conclusion, the VertiGo system utilizes a 38W RF CO₂ laser because it offers superior precision, speed, and reliability for rotary glass engraving compared to UV alternatives.

While UV lasers excel in subsurface marking, the RF CO₂ configuration remains the most cost-effective and efficient solution for high-quality surface processing on cylindrical objects.