QR code generator for part marking
Stack metal glare, dust, oil film, and scratches in as many layouts as you need. Use it for scan tests on the shop floor.
Sample data stays here until you type your own.
Four modules is the usual minimum. The dark squares stay the same size; only the white ring grows. Glare on metal often needs more.
Clean mark — overlays off.
Pick quiet zones and defects, then scan or print. Data, colors, module shape, and correction stay locked to Basic settings.
Defect cells use the quiet zone from Basic settings. Quiet-zone cells stay clean.
How to check a QR for marking
- Enter the lot, serial, or URL you will actually mark.
- For nameplates, keep square modules and high correction. Set the quiet zone to at least four modules, and try eight on a shiny surface.
- On the compare sheet, scan each cell with the same phone or gun, under similar light. If a cell fails, widen the margin or raise correction before you cut metal.
Stack several defects in one trial
You can stack dust, oil, scratches, a fixture clip, and metal glare instead of testing one defect at a time. Scan before you mark. The file you send to marking stays clean.
Tips
High correction is for nameplates, not posters
Oil mist, powder, and a fixture that clips a corner are why nameplates run high correction. A QR on a slide can stay compact. The percentage is not a promise that a dirty scan will still read.
Use square modules for laser and peen
Rounded or dotted modules belong on cards and menus. A marking head wants squares so the finder stays a finder after the beam.
Scan under the same light as the line
The overlay is a rehearsal. Download a test PNG or print the sheet, then read it with the gun or phone you actually use, under the same lamp. Send a clean file to marking.
On metal, glare eats the quiet zone
On brushed or plated metal, light from a lamp or window fills the white margin around the code. Four modules is the usual floor; shiny nameplates often need more. Use the compare sheet to see that—not as a pass/fail spec.
Common Use Cases
Stainless nameplate
A lot and serial on a brushed plate. Try eight modules of quiet zone and the glare cell before the laser program is signed off.
Incoming labels
A vendor QR that failed at receiving. Line up dust and oil at the same quiet zone as the artwork, then decide reprint versus process.
Work-instruction sticker
A painted cover that collects cutting fluid. The oil-film cell is closer to that cover than a perfect download.
Casting lot mark
A QR in a recess that powder and flash sit in. Edge clip plus dust is the usual pair to put on the sheet.
Fixture that eats the margin
A clamp that covers one side of the code in the nest. The edge-clip cell is the check before you mill the pocket smaller.
Reprint after a line fail
The gun failed at pack-out. Generate the same data, print the sheet, and see whether quiet zone or dirt is the cheaper fix.