Printers
Inline Industrial TIJ Printer — Photocell Trigger & Multi-Head Stitching
A fixed thermal inkjet station for conveyor production, with photocell triggering, encoder synchronisation and multi-head stitching up to 76.2 mm.
Key specifications
- Model
- XM-IL4
- Type
- Inline-Production
- Print height
- 6.35 mm single head – 76.2 mm with four one-inch heads stitched
- Print width
- 12.7 mm per half-inch head; 25.4 mm per one-inch head; 50.8 mm with two one-inch heads; 76.2 mm with four
- Resolution
- 600 dpi standard, up to 1200 dpi on higher-resolution configurations
- Throw distance
- 0.5 – 8 mm, set by head configuration and required placement accuracy
Overview
An inline TIJ station removes the operator from the coding step. The product arrives on a conveyor, a photocell sees it, an encoder reports the line speed, and the head fires at the right moment. From that point the quality of the result depends on the line, not on how steady someone's hand is.
The reason to choose inline over handheld is repeatability — the code lands in the same place on every unit, which is what makes automated inspection possible at all. The reason not to choose it is that inline printing assumes the product can be presented to a head at a consistent height and distance. Products that bounce, rotate, or vary in height by more than a few millimetres need either a guide or a different marking technology.
Multi-head stitching is how print height scales beyond a single cartridge. Two one-inch heads stacked give 50.8 mm and four give 76.2 mm, but each added head is another alignment to hold and another nozzle plate to keep clean. In practice the right number of heads is the minimum that covers your content, with line-speed margin rather than head count as the variable to spend on.
Unit photograph + printed sample
Awaiting real product photography and printed samples on the customer's substrate
Design points
Operator-independent coding
Photocell triggering and encoder synchronisation put the firing decision on the line rather than on a person, which is the precondition for consistent placement and for automated verification downstream.
Scalable print height by stitching
Print height extends by adding heads rather than changing the machine — 25.4 mm per one-inch head, up to 76.2 mm with four stacked and stitched.
Resolution to 1200 dpi
Higher-resolution configurations support small character heights and dense variable data where 600 dpi is marginal, such as compact 2D codes on small packs.
Protection rating matched to the environment
IP54 through IP67 configurations, selected against the actual dust, humidity, condensation and washdown conditions of the installation rather than as a default upgrade.
Line integration signals
Photocell input, encoder input and I/O for upstream and downstream equipment, so the coding station can be interlocked with the rest of the line.
Short drying budgets at line speed
Fast-dry solvent ink with the head positioned to maximise the distance before the first roller or stacker, so the drying budget is bounded by layout rather than by ink alone.
Full technical data
| Model | XM-IL4 |
|---|---|
| Type | Inline-Production |
| Print height range | 6.35 mm single head – 76.2 mm with four one-inch heads stitched |
| Print width | 12.7 mm per half-inch head; 25.4 mm per one-inch head; 50.8 mm with two one-inch heads; 76.2 mm with four |
| Resolution | 600 dpi standard, up to 1200 dpi on higher-resolution configurations |
| Print speed | Print-mode and resolution dependent; fast-dry solvent supports short drying budgets at production line speeds |
| Throw distance | 0.5 – 8 mm, set by head configuration and required placement accuracy |
| Head configuration | One to four printheads in a vertical stack, stitched into a single image |
| Trigger | Photocell product detection, encoder synchronisation, or timed firing |
| Power | Line power supply with controller cabinet; continuous operation configuration dependent |
| Protection | IP54 to IP67 depending on configuration, selected for dust, humidity and washdown exposure |
| Ink systems | Solvent fast-dry (plastic, coated metal, film); Water-based (carton, paper, wood); Covert UV (authentication and traceability marking) |
| Interface languages | English, German, French, Spanish, Portuguese, Arabic |
| Print technology | Thermal inkjet (TIJ), one-piece HP45-format cartridges |
| Print height | 6.35 mm (single quarter-height configuration) to 76.2 mm (four one-inch heads stitched) |
| Print width per head | 12.7 mm half-inch, 25.4 mm one-inch |
| Resolution | 600 dpi standard; up to 1200 dpi on higher-resolution configurations |
| Trigger modes | Photocell product detection, encoder synchronisation, timed firing |
| Throw distance | 0.5 – 8 mm, configuration dependent; shorter distance gives better placement accuracy |
| Protection | IP54 / IP65 / IP67 depending on configuration |
| Operating temperature | Configuration dependent; low-temperature and high-temperature variants available — specify your ambient range |
| Continuous operation | 8 h / 16 h / 24 h configurations, matched to your shift pattern |
| Coding content | Text, date and time, batch and lot, incrementing serial, barcode, QR and Data Matrix, variable data from file or database |
Ink base
- TIJ 2.5 Solvent CartridgeHDPE, PP, PET, coated metal and film
- Invisible UV Security InkCovert authentication and traceability marking
Confirm by sampling on your own substrate
Typical applications
- Filling and packaging lines for food, beverage and personal care
- Pharmaceutical and nutraceutical packaging lines with regulated coding requirements
- Continuous production of cable, tube, pipe and profile
- Serialisation and one-item-one-code traceability programmes
- Standardised production lines in chemical, building materials and industrial goods
Engineering notes
- 01
Line speed, not resolution, is usually the binding constraint. Specify the highest line speed you expect in the next three years rather than today's speed, because retrofitting speed margin later costs more than specifying it now.
- 02
Product presentation is the most common cause of poor inline results. If the product can move vertically, rotate, or present at a varying distance to the head, that has to be solved mechanically with a guide or a hold-down before any print setting will help.
- 03
Drying is a layout question before it is an ink question. Measure the distance from head to the first roller, stacker or product contact, and divide by line speed. If the resulting budget is shorter than the ink needs on your substrate, address the layout — moving the head, adding air movement or a dryer — rather than trying more ink variants.
- 04
Head count has a maintenance cost that does not appear on the quotation. Every added head is another alignment to verify, another nozzle plate to clean and another dropout that will eventually show up mid-run. Specify the minimum that covers the content.
- 05
Plan the ink distribution for high-volume lines before installation. At 24-hour operation the cartridge change interval becomes a scheduled maintenance event, and the whole point of choosing a large-capacity cartridge is that the change happens on your schedule rather than mid-shift.
How stitching actually works, and what it costs
A thermal inkjet cartridge prints a fixed band. There is no way to make one head print taller than its nozzle array, so print height beyond 25.4 mm is achieved by mounting several heads in a vertical stack and stitching their output into one image.
Stitching is two problems wearing one name. The first is geometric: each head’s nozzle row must continue the previous one without a visible seam, which means mechanical alignment to a tolerance tighter than the characters you are printing. The second is temporal: because the heads are physically offset, each one has to fire at a slightly different moment for its droplets to land on the same horizontal line. The encoder gives the controller the information to do that, but the timing has to be calibrated on the installed machine, not at the factory.
The cost of both is ongoing rather than one-off. Alignment drifts with vibration and thermal cycling. Every added nozzle plate is another surface that can accumulate ink mist and dust. And every seam is a place where a single dead nozzle produces a visible line across the code — the failure that gets noticed at the customer’s scanner rather than at the printer.
That is the argument for specifying the minimum number of heads that covers the content, and for spending the remaining budget on line-speed margin instead. Speed margin degrades gracefully; extra heads degrade into a maintenance burden.
Sizing the print height you actually need
| Content | Practical print height | Heads (one-inch) |
|---|---|---|
| Single-line date or batch code | 3 – 8 mm | 1 |
| Two to three lines of text | 8 – 18 mm | 1 |
| Data block with a QR code (version 4 or larger) | 20 – 30 mm | 1 – 2 |
| Multi-line block plus logo or graphic | 30 – 50 mm | 2 |
| Full-width marking across a wide pack | 50 – 76.2 mm | 3 – 4 |
These are starting points for the quotation conversation, not specifications. Character height is a design decision, and the same content can be laid out in several ways — the figures above tell you where the boundaries are so you can set the requirement from your own packaging.
What decides success, in order of importance
- Product presentation. A code cannot be placed consistently on a product that does not arrive consistently. Guides, hold-downs and product spacing solve more coding problems than any print setting.
- Drying budget. The distance from head to first contact, divided by line speed. This is the number that decides the ink, not the other way around.
- Ink-to-substrate match. Surface energy, pretreatment and the resulting adhesion. Confirm by sampling, not by datasheet alone.
- Head count and configuration. The trade between print height covered and maintenance load carried.
- Trigger and timing calibration. A one-off setup task on site, and worth scheduling properly rather than treating as part of the commissioning rush.
Notice that ink appears third. Buyers usually approach this from the cartridge side, but on an inline installation the layout decisions made in items one and two determine what the ink has to do — and a printer specified around a cartridge rather than around a line is a printer that will struggle at commissioning.
Questions engineers ask
How many printheads do I need?
The minimum that covers your content, plus margin in line speed rather than in heads. Two one-inch heads give 50.8 mm and four give 76.2 mm, but each added head is another alignment to hold and another nozzle plate to keep clean. Extra speed margin degrades gracefully; extra heads degrade into a maintenance burden.
Can it be fitted to my existing conveyor?
Usually, subject to three checks: is there mounting space above or beside the product path, is the product stable enough at the head, and can the photocell and encoder signals be taken from the line. Send photographs of the installation position, your line speed and the required print position, and we will assess it rather than guess.
The product bounces and the code lands in different places. What now?
That is a mechanical problem, not a print-setting problem. Any solution has to hold the product at a consistent height and distance from the head — a guide rail, a hold-down or a product spacing change. No ink or print setting compensates for a product that moves.
How do I work out whether my drying budget is enough?
Measure the distance from the printhead to the first roller, stacker or surface that touches the code, and divide by the line speed in the same units. That gives you the budget in seconds. Compare it with the ink's drying band on your substrate, and if the budget is short, address the layout before you try more ink variants.
Can it run around the clock?
Configurations support 8, 16 or 24-hour continuous operation. At 24-hour operation the cartridge change interval becomes a scheduled maintenance task, which is exactly why specifying a large-capacity cartridge matters — the change should happen on your schedule, not mid-shift.
Which protection rating should I specify?
Match it to the environment rather than defaulting to the highest. IP54 suits a clean, dry area; IP65 where there is dust or light water exposure; IP67 for washdown or condensation. Over-specifying protection has no operational downside but does add cost, so it is worth being accurate about the actual conditions.
Send us your substrate — we will send back a printed code
Tell us the material, the line speed and the text you need to print. We will recommend an ink system and put printed samples in the post so you can test them yourself.