Manufacturing Barcode Hardware: DPM, Labels and Spares
A production floor is harder on hardware than a warehouse, and in different ways. Vibration is constant, contamination is chemical as well as particulate, and the consequence of a device failing is usually a stopped line rather than a slower one.
What makes manufacturing different
Vibration is continuous. Warehouse equipment gets dropped occasionally; production floor equipment vibrates constantly from machinery. That is a different stress, and it affects connectors and mountings more than housings.
Contamination is chemical. Oil, coolant, solvents and cutting fluid, alongside dust. Ratings for dust and water do not necessarily cover chemical exposure, and that distinction matters when specifying.
Temperature varies by location. Areas near ovens, furnaces or presses run hot; loading areas may be open to outside conditions.
Downtime is expensive per minute. A stopped line costs more than a slow pick, which changes the spares calculation considerably.
Direct part marking
The scanning requirement that separates manufacturing from most other sectors.
Components frequently carry codes etched, dot-peened or laser-marked directly onto the part rather than printed on a label, because a label will not survive machining, heat treatment, washing or the part’s service life.
Reading those codes needs DPM optics specifically. There is no printed contrast to work with — the scanner is reading surface texture differences on metal or plastic, which requires different illumination and processing.
A standard scanner will not read a dot-peened code reliably no matter how it is configured, and this is not a settings problem. Optics are fixed at manufacture. Our PowerScan PD9630 guide covers DPM variants, and the symbologies guide covers why Data Matrix is the usual choice for direct marking.
Marked surfaces also vary — shiny machined metal, dark castings, curved surfaces — and reading angle matters more than with printed labels.
Labels that survive the process
Where labels are used, the requirement is usually harsher than warehousing.
Facestock. Polyester rather than paper, for resistance to chemicals, solvents, abrasion and temperature.
Ribbon. Resin, which bonds with synthetic facestock and resists solvents and abrasion. Wax will smudge off within a shift in an oily environment. Our media guide covers the pairings.
Adhesive. High-tack for textured, oily or curved surfaces. Standard adhesive on a lightly oiled component fails almost immediately.
Two process-specific points. Labels applied before a heat process need to survive it, which frequently rules out standard adhesives entirely. And labels applied to hot parts need adhesive rated for application at temperature — the reverse of the cold chain problem and equally specific.
Fixed versus handheld scanning
Manufacturing uses more fixed-position scanning than other sectors, and the decision is about where the part is.
Fixed-mount scanners read parts as they pass on a conveyor or through a station, with no operator involvement. Correct where flow is continuous and consistent.
Handheld scanners suit inspection, rework, goods-in and anywhere the operator brings the code to the scanner rather than the reverse.
Where operators need to see information rather than only capture a code — work instructions, specifications, quality records — that is a mobile computer. Where the scan simply feeds a system, a scanner is far cheaper and sufficient.
Printing at the line
Two considerations specific to production.
Printer class. A printer producing labels continuously through a shift is an industrial application — metal chassis for rigidity, printhead rated for sustained duty, large media capacity so it is not reloaded four times a shift. Our printer class guide covers where the line falls.
Environmental placement. Printers do not like oil mist, coolant spray or metal dust. Where possible, position them away from the process or in an enclosure. Contamination reaching the print line degrades quality and shortens printhead life — see our maintenance guide, and expect to clean more often than in an office.
Spares because downtime is expensive
The calculation is different here, and it favours holding more.
If a printer failure stops a line, the cost per hour is production output, not inconvenience. Against that, a spare printhead or a spare scanner on the shelf is trivial.
Three things worth holding: a printhead matching each printer’s resolution, since 203, 300 and 600 dpi take different part numbers; a spare scanner of the same model and optics variant, because optics cannot be substituted; and spare media and ribbon of the qualified specification, because a substitute batch that prints differently is a quality risk.
Standardising on one scanner and one printer model across the plant means one spare of each covers everywhere, which is the same argument that applies to multi-site retail rollouts.
Specifying properly
Answer these first: are codes printed on labels or marked directly onto parts; what is the smallest code, in mil; what chemicals and temperatures will equipment and labels see; is scanning fixed-position or operator-driven; does the operator need information back or only to capture; and what does an hour of line stoppage cost, which sets the spares budget.
Send us those answers and we will specify equipment that fits. See also our warehousing and logistics page.
Common questions
Why will my scanner not read dot-peened codes?
Because it needs direct part mark optics. There is no printed contrast — the scanner reads surface texture differences on metal, which requires different illumination and processing. Optics are fixed at manufacture, so this is not a settings problem.
Why do my labels smudge off on the production floor?
Almost certainly a wax ribbon in an oily environment. Manufacturing needs polyester facestock with a resin ribbon, which bonds with synthetic stock and resists solvents and abrasion, plus high-tack adhesive for oily or textured surfaces.
Does an IP rating cover chemical exposure?
Not necessarily. IP ratings describe dust and water ingress, which is not the same as resistance to oil, coolant or solvents. In manufacturing, check chemical tolerance separately rather than assuming a high IP rating covers it.
Fixed-mount or handheld scanners?
Fixed-mount where parts pass a station on continuous consistent flow, with no operator involvement. Handheld for inspection, rework and goods-in, where the operator brings the code to the scanner.
What spares should a production line hold?
A printhead matching each printer’s resolution, a scanner of the same model and optics variant since optics cannot be substituted, and qualified media and ribbon. Against the cost of a stopped line, these are trivial.
Tell us whether codes are printed or directly marked, and what chemicals and temperatures are involved, and we will specify accordingly.
