Printer issue?

Check your paper orientation.

This is a common problem and extremely simple to solve.
Thermal paper should be unrolled overhead from the top.

Update your software:

Test from the BATM ADVANCED Administration screen:

If the printer test fails, then you need to check the printer itself.
We have 2 types of printers deployed. Note the model (EP800 -or- EP802).
EP802 is the model used in all current BATMs that feature a printer.

If the printer test passes, then please check your Custom Strings in Terminal Settings.

Corrupt or malformed Custom Strings can cause the affected tickets to fail.
Try using simple strings (e.g. “Printer test”) for the affected ticket type temporarily.
If a simple string works, then add new fields one at a time until you locate the problem.

This is the Epson EP802 printer:

Perform a "self-test":

Turn off the printer with its power switch.
Hold down the "FEED" button.
Turn the printer's power switch back on.

These are problems and solutions for the EP802 printer:

"Paper Low" false errors:

1. Check that the Spindle Cap is attached & tight:

A loose or missing spindle cap can trigger intermittent & random “Paper Low” errors.

3D printing instructions for the Spidle Cap are provided below (bottom of this article).

2. Check that the sensor cable has not been pulled out:

"Paper Out" false errors:

1. Check the printer paper sensor?

The internal paper sensor may become detached if abused. Check that this sensor is present & moves up/down freely:

2. Cable routing?

If using Ethernet, make sure your network cable is routed carefully:

Network cable routing on a BATMThree

If improperly routed, a network (or other) cable may press against the paper roll (especially new rolls) when the door is closed. This is a can be a maddening issue - mind your clearance!

Firmware issue affecting EP802 printers shipped before 2023:

https://generalbytes.atlassian.net/l/cp/mam03r3u

EP800:

Self-test:

Check the printer's DIP switches are set properly:

Disconnect the printer from the BATM, and try another self-test.

If the problems persist, open a support ticket.

Be sure to attach:

a short video demonstrating the problem, and
a video of the Terminal bootup, e.g any self-test or initialization failure.

General Bytes Knowledge Base

Printer Troubleshooting