How to set up a thermal receipt printer

What you need

• A thermal receipt printer and a paper roll. Most shops use 80 mm paper; small and handheld printers use 58 mm or 44 mm.
• On an Android phone, a Bluetooth printer. On a computer, a printer on a USB or serial cable, or one installed on the computer.
• On a computer, any A4 office printer works too: the bill prints on a page.

Step 1: Choose your receipt printer

Open Settings → Printer.

• On a phone, pair the printer in the phone’s Bluetooth settings first. Paired printers appear in the list; pick yours by its name.
• On a computer, plug the USB printer in and switch it on, and it appears under USB. If it does not, try System and pick it by the name it is installed with.
• For an A4 laser or inkjet printer, choose Office.

Step 2: Choose the paper width

Measure the paper roll across with a ruler and pick its width: 44, 58, 76, 80 or 112 mm. 76 mm is for ribbon (impact) printers.

Step 3: Print a test receipt

Press Test print and check that every line fits across the paper. From now on every sale prints by itself.

If something is wrong

• The test prints gibberish: on a USB or serial printer, set Speed (baud) to the number on the printer’s label. Most receipt printers use 9600.
• Blank paper at the top of every bill: the cutter sits above the print head. Measure the empty paper above the shop name (about 19 mm on most printers), or press Print a ruler, and type it under Empty paper at the top of each bill. The app fills that space with the next bill’s shop name.
• The app cannot reach the printer: check it is switched on and in range, and that Bluetooth is on.
• An Urdu bill takes a moment longer: the printer’s own letters cannot write Urdu, so the bill is printed as a picture of the paper.
• A print failed: nothing is lost. Reprint the bill from Sales.

Questions

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