Cut() Function not working for TM-T70

[lvinci]

I am using a Raspberry Pi 4 to print on a TM-T70.

Printing works fine now after I added more flush calls to the writers because before it would not print the whole text.
However, I can not get the cut function to work.

My code:

func printReceipt(content string) error {
	lines := strings.Split(content, "\n")
	// Open the file of the printer
	printerFile, err := os.OpenFile("/dev/usb/lp0", os.O_RDWR, 0)
	if err != nil {
		return err
	}
	defer printerFile.Close()
	// Initialize the printer
	reader := bufio.NewReader(printerFile)
	writer := bufio.NewWriter(printerFile)
	readWriter := bufio.NewReadWriter(reader, writer)
	printer := escpos.New(readWriter)
	printer.Init()
	printer.SetFontSize(1, 1)
	// Write the content and cut the paper
	for _, line := range lines {
		printer.Write(line + "\n")
		readWriter.Flush()
		writer.Flush()
	}
	printer.FormfeedN(6)
	printer.Cut()
	writer.Flush()
	readWriter.Flush()
	printer.End()
	return nil
}

Thank you very much for your library and help