How does OctoPrint work?


#1

Hi,
I know 3D printers can read only .gcode files. How does OctoPrint communicate with 3D Printers through USB? Does it save every gcode command in a .gcode file and transmit to the Printer? If that's the case how is it sending the files to the printer and where does it send? because I couldn't see any files on the SD card.
Thanks.


#2

OctoPrint reads the gcode and sends each line to the printer over serial (the 's' in USB). It doesn't go to the SD card because it can talk directly.


#3

So if it sends each line of Gcode directly to the printer, how does the printer know its a Gcode. I mean we could send anything through USB.


#4

It's just an agreement on protocol. G-code is what the printer is expecting to receive. Octoprint negotiates the right sending speed and then sends a line, gets an okay, and continues.


#5

Tedder, doesn't the firmware respond with "OK" if it likes what it's seeing? And then OctoPrint sees that and is happy as a result...?

But I guess your firmware could be from Memphis.

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