The short answer
Inline labeling puts the label into the placement pass: the feeder takes a slot on the platform and the nozzle places the label with the components. Offline labeling gives the label its own station, either standalone or in a separate cell.
Inline wins when the board is already on the placement machine and the label has to be there anyway. Offline wins when the labeling is not tied to a board that goes through SMT, when the part is not a PCB, or when the label placement needs its own process window.
What changes on the line
Station count. Inline adds a feeder slot, not a machine. Offline adds a station, its infeed and outfeed, and its own footprint.
Placement program. With the feeder presenting labels on its own sensor, the placement program does not have to change — the label is simply another item the nozzle picks up. Where the machine drives the feed, one signal line is added.
Process window. Inline labeling shares the placement machine’s environment. Offline labeling gets its own — which matters if the label cannot tolerate the conditions on the placement platform, or if the labeling has to happen after reflow.
Changeover. Placing labels inline means labels are prepared with the rest of the feeder set for that product. Offline labeling needs its own changeover step and its own schedule.
Questions that decide it
- Does the part already pass through the placement machine? If yes, inline avoids a second handling step.
- Does the label have to be applied before or after reflow, and can it tolerate that environment?
- How many different labels run on the same board, and do they fit within one feeder’s column count?
- What is the widest label? Compare it with the model limits — the reel range reaches 248 mm label width with up to 14 columns.
- Does the labeling step have to be isolated for quality or traceability reasons?
- Is the part a PCB at all? If it is not, the labeling machine line is the relevant family.
Where the two meet
Inline and offline labeling are not mutually exclusive. A line can place the board label inline with a feeder and route the non-PCB labels — carton, packaging, sub-assembly — to a labeling machine. The material list is the same either way: paper labels, metal pieces, foam, thermal pads, Mylar tape, dust mesh and high-temperature tape on roll.
What to measure before deciding
The honest answer is that the comparison depends on your numbers, not on a general rule. Three figures decide most cases: how many labels per board, how long the labeling step currently takes including handling, and how often the product mix changes. Measure those three and the choice usually becomes obvious.
Send us the placement machine, the label size and the labels per board, and we will say whether a feeder covers it — and which model.