The Epson LQ-350 is a 24-pin matrix printer. CUPS will automatically discover it when you plug it in via USB, but you have to choose a compatible model from the choices given from the local database. I achieved good results with “Epson LQ-570+”, which allows you to set fanfold sizes as standard paper and choose the maximum resolution of 360 × 180 dots per inch.

The printer also a parallel interface, but I could not test it due to the lack of a corresponding interface on my laptop.