Dot-matrix printing: print your invoices on an impact printer

At the counter, an invoice doesn’t come out of a laser printer on A4: it comes out of a dot-matrix impact printer (Epson LX-350, LQ-590…), on continuous multi-part paper that produces the original and its carbon copies in a single pass. It’s fast, rugged and cheap to run — the standard expected in Central African retail.

SynkriaOps prints directly on these printers. No PDF to open, no dialog box: you click Print in the app, and the invoice comes out of the tray, aligned with your paper, in an instant.

Is this section for you?

If you print your invoices on regular A4 (laser, inkjet) or send them as PDF by email, no installation is needed: PDF preview and download already work in the app. This section covers direct dot-matrix printing only.

How it works

Dot-matrix printing relies on a small program — the SynkriaOps print agent — installed on the PC connected to the printer (usually the point-of-sale machine).

The principle is simple and safe:

1. You click Print on an invoice in SynkriaOps.
2. The app prepares the document in the native format of dot-matrix printers.
3. The agent installed on the PC picks up the job and sends it straight to the printer.

Installed once, forgotten for good

The agent is installed once, then forgets about itself: it starts with the computer — no need to open a session or launch anything in the morning — runs without any window, and restarts on its own if anything goes wrong. You switch on the POS machine, and you print.

Your printer stays with you

The printer is never exposed to the internet. It is always the agent, on your PC, that talks to the printer — exactly like point-of-sale software. The agent only makes outbound connections (no port open on the PC) and only prints what your account sends it.

What you need

• A Windows 10 or 11 PC connected to the dot-matrix printer (USB or network).
• The printer installed in Windows (it appears under “Printers & scanners”).
• An internet connection on that PC.
• Administrator rights on that PC, for the duration of the install (one time only).
• A SynkriaOps account with a dot-matrix invoice template enabled (“Sale of goods” profile).

Getting printing up and running

Three steps, one time, about fifteen minutes in total:

1. Install the print agent Download, connect the machine and start the agent. Once and for all: it then starts with the computer and restarts on its own.

2. Choose & set up your printer The right driver and the right settings for reliable printing on an Epson pin printer. The recommended configuration, explained step by step.

3. Troubleshoot a printing problem The command that gives you the full picture in ten seconds, the diagnostic that pinpoints the cause in a minute, and the fixes for common situations.

Printing built for your business

Native dot-matrix printing is part of SynkriaOps: it is designed for businesses that invoice at the counter, on multi-part paper, in French-speaking Africa. Follow these pages in order and your printer will be printing your invoices within minutes.