Four barcode laser marking machines
All four are lasers. Which one you need is decided by the material, not by the code.
Barcode Marking · Metal · Plastic · Glass · Acrylic · PCB
Barcode Laser Marking Machines
One barcode laser marking machine does not fit every material. Steel, copper, plastic and glass each need a different beam — HeatSign builds all four types and sets them up for what you actually mark.
Desktop Fiber Laser · 20W / 30W / 50W
The standard barcode engraving machine
Price Range : $1950 – $3000
This covers most of the work: steel, stainless, coated metal and bare aluminum. A fixed table, a repeatable focus and no consumables. If your parts come to a bench and they are ordinary steel, start here.
Marking area 110 × 110 mm, larger on request
Air cooled | No consumables | 1D, 2D and text from one file
Air cooled | No consumables | 1D, 2D and text from one file
Steel . Stainless . Coated metal . Nameplates . Tags
HS-FL100M · MOPA Fiber Laser · 100W
For copper, brass and anodized aluminum
Price Range :$5,300 – $6,800
Copper and brass throw the beam back and carry heat away faster than any other common metal, so a standard laser struggles to leave a readable code. A MOPA shortens the pulse, putting the energy in before the heat escapes.
Adjustable pulse | Handles reflective and high-conductivity metal
True black on anodized aluminum — the highest contrast for scanning
True black on anodized aluminum — the highest contrast for scanning
Copper . Brass . Anodized aluminum . Thin sections
UV Laser · 355nm · 5W / 10W
For boards, plastics and glass
Price Range : $3,000 – $5,900
A 355nm beam marks with light rather than heat, so a board does not scorch and thin plastic does not melt. Line width goes down to 0.01 mm, which is what lets a readable 2D code fit on a component the size of a fingernail.
Line width to 0.01 mm | Cold marking, no heat damage
PCB, plastics, glass, acrylic, ceramics | Copper traces stay safe
PCB, plastics, glass, acrylic, ceramics | Copper traces stay safe
PCB . Plastics . Glass . Acrylic . Ceramics
Portable Fiber Laser · 30W / 50W
When the part will not fit on a bench
Price Range : $1,950 – $3,800
The head goes to the part instead of the part going to the machine. Used as an aluminum laser barcode printer on large panels, and on castings, housings and anything already built into an assembly.
Head carried to the part | Adjustable working distance
Large panels, castings, housings, welded assemblies
Large panels, castings, housings, welded assemblies
Large panels . Castings . Housings . Assemblies
Laser barcode marking on metal, plastic and glass
The same file gives a different result on every material. Metals are where most of the work is, but a barcode on plastic needs a different beam entirely.
Two lasers, four materials, one scanner
UV on plastic, fiber on stainless, anodized aluminum and copper. Fourdifferent settings, four codes that all read on the same scanner.
Material | How the barcode comes out | Difficulty | Machine |
|---|---|---|---|
Steelmild, carbon, tool steel | Laser barcode marking on steel gives dark grey to black on a light surface — the easiest metal to get a scannable code on, and the fastest. | Easy | |
Stainless steel | Barcode marking on stainless steel is done by annealing — black without cutting into the surface, so corrosion resistance is kept. | Easy | |
Anodized aluminum | White code on a dark case with a standard laser. A MOPA can also produce a true black, which scans better than white on some readers. | Medium | |
Bare aluminum | Barcode engraving on aluminum gives grey on a shiny surface. Contrast is weaker than on steel, so cell size and quiet zone matter more. | Medium | |
Copper and brass | The hardest common metal to mark. Copper reflects most of the beam and pulls heat away from the spot before the mark forms. | Hard | |
Coated and painted metal | The coating comes off and the metal shows through. The strongest black and white of any surface, and the easiest to scan. | Easy | |
PlasticsABS, PC, PVC, nylon | Light on dark or dark on light. A fiber laser burns and melts the edge of the code, so contrast comes out uneven. UV marks it cold. | Medium | |
Acrylic and glass | Frosted white on a clear surface, with clean edges and no cracking. This is where UV clearly beats every other source. | Medium | |
PCB and ceramics | Fine 2D codes on very small areas. The board does not scorch and copper traces stay safe. | Medium |
Barcode marking on copper is worth calling out. Copper reflects most of a 1064 nm beam and carries heat away roughly eight times faster than steel, so the energy leaves the spot before a mark forms.
Turning the power up burns the surface instead of fixing it. A shorter pulse is the answer, which is why copper work needs a MOPA.
1D barcode or 2D code, and why the part decides
A linear barcode needs a long strip. A 2D code holds the same data in a small square. On a small part, that difference decides everything.
1D · Linear barcode
Bars of different widths, read left to right
Wide and short. It needs a flat strip long enough for the whole code plus a clear margin at each end.
- UPC-A — 12 digits, retail and grocery
- Code 39 — letters and numbers, healthcare and government
- Code 128 — full character set, shipping and logistics
- Read by a cheap line scanner
- One damaged bar and the code is dead
2D · Data Matrix and QR
A square grid, read in any direction
Holds far more data in far less space, and keeps working when part of it is damaged.
- Data Matrix — the industrial standard for direct part marking
- QR — the same idea, used more in marketing than in factories
- Fits on parts where a 1D barcode will not
- Built-in error correction survives scratches
- Needs a 2D imager, not a line scanner
The rule of thumb. If the part has a flat area longer than about 30 mm, a 1D barcode fits and a line scanner will read it. Below that, 2D barcode laser marking is usually the only way to carry the same data.
If your customer has specified the code type, follow their specification. If not, tell us the part size and the data you need to carry and we will say which fits.
Why a laser-engraved barcode fails to scan
Four reasons a code that looks fine on the part will not read on a scanner.
10×: Margin, in bar widths
Both ends: Not just one side
What HeatSign does
Lay out the code with the margin included before quoting, so you find out at the drawing stage rather than after the first batch.
Matte: Frost the background first
Angle: Or move the reader off axis
What HeatSign does
Mark a matte panel around the code so the surface stops acting like a mirror. It costs nothing extra and it is usually the whole fix.
Rotary: Turns the part under the beam
Or 2D: A small square avoids the curve
What HeatSign does
Recommend a rotary fixture for round parts, or a 2D code small enough to sit on the flat part of the curve. Which one depends on the diameter.
ISO/IEC 29158: The grading standard for direct marks
Grade A–F: What an audit asks for
What HeatSign does
Set the machine to read well, not to only just read. Tell us the grade your customer asks for and we will say whether your surface can reach it.
How to choose a barcode marking machine
Three questions. The first one rules out half the options.
QUESTION 1
Has your customer specified the code?
Yes → follow it exactly, including size and grade.
No → the part size decides.
QUESTION 2
Can the part come to the machine?
Yes → a bench machine.
No → a portable head carried to the part.
QUESTION 3
What happens to the part afterwards?
Nothing → a laser mark lasts.
Painted or plated → the code gets covered.
Marking QR codes rather than barcodes? The machines are the same, but the layout rules are different. See QR code laser engraving →
Questions about barcode laser marking
What software makes the barcode, and does it come with the machine?
The marking software is included and it generates the barcode itself. You type the number or load a list, pick the code type, and it draws the bars. You do not need a separate barcode generator.
What it will not do is design your numbering system. That comes from you or from your customer’s specification.
Can it pull the numbers from our ERP or production system?
It reads a spreadsheet or a text file exported from almost any system, which is how most shops do it. Export the day’s job, load the file, and the operator selects a line rather than typing a number.
A live connection into an ERP is a different kind of project. If that is what you need, say so early — it changes the specification.
Do we need a verifier as well as a scanner?
Only if your customer asks for a grade on paper. A scanner tells you the code reads. A verifier scores it against a standard and prints a report.
They are different devices and the verifier costs more. Most shops start with an ordinary scanner and only buy a verifier when a customer asks for the report.
Can it mark parts moving on a conveyor?
Not with a bench machine. Marking a moving part needs a laser set up to track the line speed, which is a different configuration from a static one.
If your parts stop for a few seconds anyway, a standard machine on a fixture is far cheaper and does the same job. Tell us how the parts arrive and we will say which case you are in.
What is the smallest barcode that still scans?
For a 1D barcode the limit is usually the length, not the height — the bars have to stay wide enough for the scanner to separate them. Around 20 mm of clear length is a practical floor on most readers.
A 2D code goes much smaller. On a machined surface with a UV laser, a readable Data Matrix fits inside 3 mm square. Send the part and the data and we will tell you what fits.
Is it safe to run in an open workshop?
These are Class 4 lasers. They need an enclosure or a screened area and proper eye protection, and nobody should be near the beam path while it runs.
Marking metal also makes fine particles, so extraction is normal practice. Tell us where the machine will sit and we will say what you need.
How much does a barcode laser marking machine cost?
Portable fiber lasers are $1,950 to $3,800, UV lasers $3,000 to $5,900 and the MOPA $5,300 to $6,800. Desktop fiber is priced on configuration, because marking area and power change the figure.
Tell us the metal, the code type and roughly how many parts a day, and you will have a price the same working day.