Replacing Impact Printers with Continuous-Form Laser

When replacing impact printers with laser is the right call

Impact printing usually covers three different machines in the same plant: line matrix printers running continuous fanfold at several hundred to a couple of thousand lines per minute, older band or drum line printers, and serial dot matrix units handling low-volume forms at a workstation. Each gets replaced for different reasons, and the decision is driven by the document, not by the age of the printer.

The clean case for continuous-form laser is a steady stream of single-part documents. Pick tickets, packing lists, invoices, statements, manifests, bills of lading, month-end reports and lab results all print faster, quieter and sharper on a laser engine, and they let you drop pre-printed stock in favor of electronic overlays. The case weakens the moment a document has to exist in three physical copies at the instant it prints, or the media is thicker than a fuser path will tolerate.

What you actually gain

• Noise goes away. A line matrix printer at full speed is one of the loudest devices on the floor and usually ends up inside an acoustic cabinet or a closed room. Continuous-form laser engines run at levels that let the printer sit next to the people using the output.
• Throughput is measured in pages, not lines. Production continuous-form lasers are rated in feet or pages per minute and hold that rate regardless of how much ink coverage the page has. Line matrix speed collapses when you switch from draft to near letter quality or add graphics.
• Barcodes and graphics become usable. At 300 or 600 dpi you get scannable linear and 2D barcodes, logos, signature images, shaded table rows and small-point legal text. Dot matrix simply cannot hold an edge cleanly enough for a verifier-grade barcode.
• Ribbons and print quality drift disappear. No more fading through the ribbon life cycle, no ribbon changes mid-run, no operator judgment about when output has gotten too light to scan.
• Forms inventory shrinks. Pre-printed forms become plain fanfold or roll stock plus an electronic overlay, which removes the obsolete-forms write-off you take every time a logo, address or disclaimer changes.

Where impact printers still win

Solving the multi-part forms problem

Multi-part output is the single reason most impact-to-laser projects stall. Before you accept it as a blocker, separate the requirement from the habit. Ask who receives each ply, what they do with it, and whether a signature or a wet-ink stamp is legally required on that copy.

Once you know which plies are real, there are four workable paths. Printing duplicate laser copies is the simplest, and on plain fanfold the paper cost of a second and third page is often lower than the cost of the carbonless form it replaces. Emailing or archiving the file copy removes a ply outright. And where a customer or driver signature must return to you on paper, keeping one impact unit for that document is cheaper than fighting the requirement. Our serial dot matrix printers and line printers exist for exactly those survivors.

Forms overlays and electronic forms

The financial argument for conversion is usually strongest here rather than in the printer itself. Pre-printed forms carry setup charges, minimum order quantities, storage, version control and scrap. An electronic overlay stores the box rules, logo, terms and static text on the printer or in the print stream, then merges it with variable data at print time.

How the overlay gets there depends on the environment. In an IBM i shop it can be an AFP page definition and form definition driven by Print Services Facility. In a distributed environment it is more often a PCL macro, a PostScript form, or a fully composed PDF sent directly to the printer. Any of them work; what matters is that one team owns the overlay library and its version history.

What has to change in the print stream

This is the part IT underestimates. Impact printers typically accept a simple line-data stream, an SCS data stream from an IBM i, or a basic emulation such as Epson FX, IBM Proprinter or ANSI. A continuous-form laser is a page printer, so somewhere between the application and the engine, line data has to be composed into pages.

• Emulation on the printer. Production continuous-form lasers commonly offer PCL5e, PostScript, IPDS, line-printer and legacy impact emulations, so the host can keep sending what it always sent. This is the lowest-risk route.
• Host-side composition. Page definitions, form definitions and AFP resources handle formatting on the host. Accurate but it involves your IBM i or mainframe team, and it is worth reading up on IPDS, SCS and Host Print Transform before you commit.
• Lines per inch and page length. A 66-line report at 6 lpi does not automatically fit a laser page with unprintable margins. Expect to adjust LPI, CPI, page length and margin definitions, and to reprint a sample of every critical form.
• Finishing. Continuous laser output still comes out as a web. Decide up front whether it is refolded, rewound or fed into a burster to produce separated documents.

Consumables, maintenance and running cost

Impact printers are cheap to run and expensive to feed. Ribbons cost very little per page, but pre-printed multi-part forms are the real spend, along with the labor to load, align, decollate and store them. Laser flips that: toner and periodic maintenance kits including fuser, developer and transfer components are the recurring cost, while paper becomes plain and generic.

Planning the cutover without stopping shipments

• Inventory every document, not every printer. List each form, its source application, its plies, its recipients and its volume. That list is the project.
• Pick a low-risk pilot. Internal reports or pick lists let you validate paper path, overlay quality and throughput before anything customer-facing moves.
• Run parallel. Keep the impact printer queued and available until the laser output has survived a month-end close and a peak shipping day.
• Plan the forms burn-down. Time the conversion so existing pre-printed stock is consumed rather than scrapped.

How PCI handles impact-to-laser conversions

Printer Connection has been placing and servicing both technologies since 2001, which means we have no incentive to talk you out of an impact printer that is still the right answer. We start with your document list, identify which forms convert cleanly, which need a second pass or an electronic copy, and which should stay on impact hardware. From there we size the right continuous-form laser printer, including Microplex continuous-form printing systems for high-duty production work, and handle the overlay, emulation and paper-path testing as part of printer upgrade and replacement services. If you are still weighing the two technologies in the abstract, our comparison of line printer versus continuous-form laser covers the decision triggers. Send us a sample of your worst form and we will tell you honestly whether it should move.