Format - HeribertHechtersheim/Z-CodeReverseEngineering GitHub Wiki

Wiki ▸ [Z-Code Documentation](Z Code Documentation) ▸ File Format

A .zcode file consists of a header, which contains all the information the printer displays in the print menu (time, material...) followed by a list of commands the printer will execute during printing.

Header

The header is block of 128 bytes at the beginning of the file. The first 16 bytes contain the ascii characters of "ZCode" followed by zeros:
5A 43 6F 64 65 00 00 00 00 00 00 00 00 00 00 00

Offset (Hex)	Type	Content
00	char[5]	ASCII Characters of "ZCode"
10	byte[38]	unknown
36	int32_t	Printing time in seconds. Chaotic behaviour: Negative values will start the print automatically
3A	byte[4]	unknown
3E	int8_t	Printing Material: 0 - "Z-ABS", 1 - "Z-Ultrat", 2 - "Z-Glass", 3 - "Z-HIPS", 4 - "Z-PCABS", 5 - "Z-PETG", else: ""
3F	byte[63]	unknown
7F	uint8_t	DVB_S2 checksum of byte 00 to 7E

Commands

The commands are saved chronologically in the way they shall be executed by the printer. Ahead of each command data a byte is written containing the byte-length of the command data and the checksum. Behind the data another byte is written cointaining the DVB_S2 checksum of the bytelength and the data. Example for moving the head up:

Bytelength	Command Data	DVB_S2 checksum
08	01 FF 04 00 00 01 00	D4