If you're working out how to choose a fiber laser cutting machine, start with your parts, not the kilowatts. Power is the number printed in bold on every datasheet, which is exactly why it's a poor place to begin. We'd rather walk through it the way a workshop actually decides: what you cut, how big the sheets are, how they get onto the bed, and then, last, how much laser it takes. Where one of our WISECUT machines fits an answer, we say so and quote the figures from its product page.
Define the work you cut every week
Before you email a single supplier, put one page together. List each metal you cut regularly with its grade, the thickness you run on a normal day, the thickest routine job, and a rough monthly volume. It sounds tedious, but it's the page that helps you get quotes you can compare and avoid specifying the wrong configuration. One published selection guide is blunt about why: the gap between typical and maximum thickness decides more of your budget than any other figure (Durma buyer's guide). A buyer checklist from another maker says the same thing in fewer words: the common thickness matters more than the maximum (GYC checklist).
A thick plate job that turns up once a quarter shouldn't dictate what you buy for the other eleven weeks, and it's worth asking whether you could simply subcontract it. Often that's cheaper.
Two more lines belong on that page: the sheet formats your steel supplier really delivers (plus your biggest regular part), and whether any tube or profile work is in the mix. Those answers settle most of what comes next.
Match the bed to your sheet and your floor
Bed size is the first hard filter. Set your sheet format against the usable cutting area rather than the overall table size, and leave a margin for clamping and nesting; the Durma guide draws that same line. Our sheet-metal range comes in five working areas. The figures below are nominal ones from our product listings:
| Model | Structure | Power range | Working area |
|---|---|---|---|
| WT-1530 | Open, single platform | 3000–12000 W | 1550 × 3050 mm |
| WT-4020 | Open, exchange table | 3–12 kW | 4050 × 2050 mm |
| WT-6025 | Fully enclosed, exchange table | 6000–30000 W | 6050 × 2550 mm |
| WT-3015S | Space-saving, fully enclosed | 3000–12000 W | 3050 × 1550 mm |
| WT-12025 | Large-format, fully enclosed | 6000–30000 W | 12050 × 2550 mm |
Floor space and shipping count for as much as sheet size does. The WT-3015S is listed as going into a 20HQ container without being taken apart, a detail that sounds minor until you're planning how it gets through a tight workshop door. Our sheet metal category page lays all five out side by side if you'd rather compare them in one place.
Single platform, exchange table or fully enclosed
For many small and mid-sized fabricators a single-platform machine is the sensible place to start: you can program the next job while the current sheet is cutting, and it's easy to get at and to keep running. The price you pay is that the beam sits idle while somebody loads and unloads.
An exchange table gives you two pallets, so one can be reloaded while the other is cutting. Don't expect faster cutting from it; what you get back is beam time. The Durma guide makes the same point in qualitative terms: without an exchange table, the beam sits idle every time a sheet is unloaded and the next one loaded. Count how many sheet changes your shift really involves, put that idle time against the price difference over a few years, and the answer usually becomes obvious, one way or the other. On our range the WT-4020 is the open exchange-table model and the WT-6025 is the fully enclosed one.
Automation is the step after that. Our automatic loading and unloading system combines a gantry loading robot, a double-layer electric exchange trolley, CNC control and a vacuum system, with a 700 mm lift stroke, a traverse of 5500 mm (adjustable) and loading repeatability of ±2 mm. Load capacity and cycle time aren't published for it, so if material handling is where your day goes, get both in writing. And if cutting rather than handling is the slow part, skip it.
Sheet only, tube only or a combination machine
This is where buyers get tempted by "more functions". A combined machine saves you moving work between two separate machines, but the Durma guide says it only earns its place if tube work is genuinely recurring. The GYC checklist is a little more specific: a combined machine suits occasional mixed work, while frequent tube cutting points to a dedicated tube laser. It tells the story of a buyer who hardly ever used the tube function and eventually bought a separate tube machine anyway.
Our own range follows the same split. The WT-3015PT pairs a 3050 × 1550 mm sheet bed with tube cutting from Φ20 to 220 mm up to 6000 mm long, and an exchange table is optional. If tube is the main job, look at the tube range. The two-chuck WT-6023T is listed at 3–6 kW with a 6.0 m maximum tube length and a zero-tailing design; the three-chuck WT-6035T goes to 3–12 kW and 12 m and handles V, X, Y and K bevels at ±45°; the four-chuck WT-12035T is listed at 3–20 kW, also 12 m.
One gap you'll want to close before ordering is chuck clamping range and remnant length. Our listings don't carry confirmed figures for either, so get them into the quotation for the exact profiles you cut.
How much laser power do you need?
Power is where buyers most often overspend. What you need depends on the material, its grade, the thickness, the assist gas, the speed you're aiming for and the edge quality your customers expect, so maximum thickness alone tells you very little. Reflective metals like aluminium and copper are cut well by fiber lasers, provided the machine is specified with a suitable source, cutting head and back-reflection protection. Grade matters too: polished stainless is harder to cut than plain mild steel at the same thickness, which is why a generic chart can mislead you.
You won't find a thickness-versus-kilowatt table here. Cutting data for each of our models hasn't been confirmed for publication, and we'd rather not guess. Send us your material, grade and everyday thickness and ask for cutting data on that. For scale, the sheet models above run from 3 kW up to 30 kW, so the range itself is unlikely to hold you back.
Two practical things get forgotten until they bite. One is electrical supply: voltage, phase, frequency and available capacity should be confirmed early, because a surprise there delays installation. The other is gas. Find out what oxygen, nitrogen or compressed air costs where you are and how easily you can buy it. The GYC checklist notes that in some countries nitrogen or oxygen is expensive or hard to get, and that can move your running cost more than the laser itself does.
What to ask a supplier before you sign
Comparing machines on price and kilowatts alone is a trap. The Durma guide points out that two quotations can differ substantially purely because one includes extraction, a gas generator, software licences and training while the other leaves them out. Ask for a full configuration list and line the quotes up on equal terms. The GYC checklist also reminds buyers that shipping, import duty, installation, local maintenance and spare parts all belong in the real cost.
Be wary of accuracy numbers on a datasheet, too. Published positioning accuracy describes machine motion, not finished parts, so the honest test is your own material on the machine. We offer free proofing: send a drawing, the material and the thickness through the contact form and we'll quote against it. Training and remote support are part of what we list on our service page.
When you do write to a supplier, put the whole picture in the first message: your country, industry, material, common and maximum thickness, sheet or tube size, daily volume, power supply and gas situation. With that in hand a supplier can recommend an actual configuration rather than a price list. If you'd like to browse first, our machine overview is the place to start.
FAQ
How do I choose the right fiber laser cutting machine for my workshop?
Begin with what you cut every week: the grade, the usual thickness, your sheet format and whether any tube is involved. Pick the bed size and table type from that, and settle the power last. A thick job you only see once a quarter shouldn't decide the specification.
Do I need an exchange table?
It depends on how much beam time loading costs you. Change sheets often and the arithmetic can favor one. Run long batches with few changes and a single platform is simpler to operate and keep running. Work it out over a few years before paying the difference.
Is a sheet-and-tube combination machine worth it?
If sheet and tube work are both regular but neither is huge, it can be. When tube is your main business a dedicated tube machine is usually cleaner, and if tube jobs are only occasional a sheet-only machine will use its time better.
How much laser power do I need?
That comes down to material, grade, thickness, assist gas, target speed and edge quality, not maximum thickness alone. Ask the supplier for cutting data on your own material rather than trusting a generic power chart.
