KEYES ROSTOK Manual And Manual page 87

', ' mark is optional . Note that some firmwares list file names in upper case, but - when sent to
the M23 command (below) they must be in lower case. This seems to be a function of the SD
software. Go figure...
M21: Initialize SD card
Example: M21
The SD card is initialized. If an SD card is loaded when the machine is switched on, this will
happen by default. SD card must be initialized for the other SD functions to work.
M22: Release SD card
Example: M22
SD card is released, so further (accidental) attempts to read from it are guaranteed to fail. Helpful,
but not mandatory before removing the card physically.
M23: Select SD file
Example: M23 filename.gco
The file specified as filename.gco (8.3 naming convention is supported) is selected ready for
printing.
M24: Start/resume SD print
Example: M24
The machine prints from the file selected with the M23 command.
M25: Pause SD print
Example: M25
The machine pauses printing file selected with the M23 command at the current position.
M26: Set SD position
Example: M26
Set SD position in bytes (M26 S12345).
M27: Report SD print status
Example: M27
Report SD print status.
M28: Begin write to SD card
Example: M28 filename.gco
File specified by filename.gco is created (or overwritten if it exists) on the SD card and all
subsequent commands sent to the machine are written to that file.
M29: Stop writing to SD card
Example: M29 filename.gco
File opened by M28 command is closed, and all subsequent commands sent to the machine are
executed as normal.
M30: Delete a file on the SD card
Example: M30 filename.gco
filename.gco is deleted.
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