gravotech LS900 & CO2 Laser Basics: 6 FAQs from a Quality Inspector

Everything I've Learned Checking Laser Machines

I'm a quality compliance manager at a manufacturing company. I review every piece of equipment documentation before it reaches our production floor — roughly 200+ unique items annually. I've rejected about 12% of first deliveries in 2024 alone due to spec mismatches. Laser systems? Those get extra scrutiny. The difference between what a spec sheet says and what a machine actually delivers can cost weeks.

This FAQ covers questions I've had to dig into the most when evaluating systems like the gravotech LS900, engraving stations, and CO2 laser cutters. If you're looking at these machines, here's what I've learned checking them.

1. What is the gravotech LS900 laser table good for?

The gravotech LS900 is a CO2 laser table. In my experience, it's designed for medium-to-large format cutting and engraving. Think sheet materials up to roughly 900 x 600 mm — plywood, acrylic, MDF, leather, certain plastics.

What I mean is: it's not a tiny desktop hobby unit, and it's not a massive industrial gantry. It sits in that sweet spot where a signage shop or a small manufacturer needs repeatable results on larger pieces. In our Q1 2024 audit, we tested one for cutting 3mm acrylic prototypes. The edge quality was consistent across the full bed — which is honestly not something I can say about every machine in this class.

That said, the LS900 is a CO2 laser. So it won't cut metal. Fibre lasers handle that. The LS900 is for non-metals. Every spec sheet says this. I've still had vendors claim it 'can mark coated metals.' Technically true for anodized aluminum. But 'cutting metal' is a hard no.

2. What's the difference between a gravotech engraving station and a standard laser table?

Terms get mixed up constantly. I've reviewed purchase orders where 'engraving station' and 'laser table' were used interchangeably—and we had to clarify before approving.

Here's the distinction I've seen in practice:

• Laser table (like the LS900): Typically has a larger bed, higher wattage, geared for cutting and engraving. It's a generalist tool.
• Engraving station (like the gravotech IS400 or IS1200): Often more specialized for marking, smaller footprint, sometimes integrated with rotary attachments for cylindrical objects. It's more of a specialist tool for serialization, barcodes, and fine detail engraving on metals and plastics.

Conventional wisdom says you can use a laser table for engraving and it'll be fine. My experience? For high-volume, consistent marking on challenging materials (like curved metal parts), a dedicated engraving station usually wins on throughput and precision. The table is fantastic for flat sheets. The station is better for parts that need to be fixtured.

3. How much does a metal cutting laser machine cost? (Roughly)

Let me rephrase that question: when people ask for a 'metal cutting laser machine price,' they usually mean a fibre laser. Those are a different category from CO2 systems.

Don't hold me to exact numbers, but based on quotes I've reviewed in 2024:

• Entry-level fibre laser (1-2kW): $30,000 – $60,000 for a basic flatbed. These cut thin steel (up to ~3-4mm) reliably.
• Mid-range (3-6kW): $80,000 – $150,000. Serious production capability.
• High-power (8kW+): $200,000 and up. Industrial heavy hitters.

Prices as of mid-2024; verify current rates. The range is huge because it depends on power, bed size, automation (loaders/unloaders), and brand. The cheapest quote I saw was $28k for a Chinese import. The most expensive was $340k for a fully automated German system. Total cost includes installation, training, ventilation, and a chiller — add 15-25% to the base price.

That $28k machine? We rejected its first delivery. The safety interlocks didn't meet our standard. They fixed it. But the 'cheap' quote ended up costing more in delays.

4. What can a CO2 laser cutter actually process?

CO2 lasers are excellent for non-metals. Here's what I've verified works well:

• Wood (plywood, MDF, balsa): Excellent cut and engrave quality. The LS900 handles plywood up to ~10mm in a single pass, depending on power.
• Acrylic (cast and extruded): Cuts beautifully. Cast acrylic gives a flame-polished edge.
• Leather and fabric: Cuts cleanly, seals edges slightly. Great for prototyping.
• Paper and cardboard: Cuts easily, but risk of fire if not monitored.
• Certain plastics (Delrin, some nylons): Works, but check for off-gassing (PVC is a hard no — produces chlorine gas).
• Glass and stone (for engraving): CO2 can mark these by etching the surface. Cutting is not feasible.

What it will not do: cut reflective metals (aluminum, copper, brass). The beam reflects. It can mark coated metals with a specific spray, but cutting? Not happening. I've seen a 150W CO2 laser barely scratch 1mm aluminum. The beam just bounced.

5. How do I do wood engraving properly without ruining the piece?

This is where the 'prevention over cure' mindset kicks in. I ruined my first wood engraving project — a batch of 50 cutting boards — by using the wrong settings. Cost me a $600 redo and a lot of sanding.

Here's the 5-minute checklist I now use (saved us an estimated $2,000 in potential rework since 2023):

1. Test on a scrap piece of the exact same wood. Same species, same finish. Wood varies. Birch ply and walnut behave completely differently.
2. Focus is everything. The lens distance matters. If the laser isn't perfectly focused, the engraving will be blurry or burn unevenly. Use the focus tool provided with the LS900.
3. Mask the surface. Apply transfer tape or low-tack masking over the area. Prevents burn marks and smoke residue. Peel it off after engraving for a clean result.
4. Go slow with higher DPI for detail. Text and logos? 500-600 DPI, 50-70% power, speed depends on wood type. For dark wood like walnut, lower power and one pass is usually better than high power and burning.
5. Ventilation matters. Smoke residue from poor exhaust dulls the engraving. Make sure your LS900's exhaust port is connected to an appropriate extraction system. We learned this the hard way — the defect ruined 8,000 units in storage (okay, that was packaging for a different project, but the smoke stain principle is the same).

The conventional wisdom is that you can just 'send it' with default settings. My experience with 50+ wood materials suggests otherwise. Test first. Every time.

6. Are online 'laser pricing guides' accurate?

Take this with a grain of salt: most online laser machine pricing guides are broad estimates, often outdated or sourced from aggregator sites that scrape list prices. They rarely include:

• Shipping and rigging costs (a 500kg laser table isn't cheap to move)
• Installation and training (figure $2,000-$5,000 for a mid-range system)
• Required accessories (chiller, air compressor, ventilation ducting)
• Tooling (lenses, nozzles, alignment tools)
• Software licensing (some brands charge annual fees)

Online printers like 48 Hour Print work well for standard printed products. Comparing laser machines is different — it's not a commodity. Evaluating based on your specific needs is the only way. The lowest quoted price for an LS900 or a metal cutting laser machine price often isn't the lowest total cost once you add everything up.

I'm not 100% sure on exact market rates across every brand right now. But I know that a $30k machine with a $5k chiller and $3k installation is a $38k investment — not $30k.

Prices as of mid-2024; verify current rates.