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How do I change settings without the LCD screen?

I am supporting a teacher who is implementing 3D printing in the elementary classroom. We are slowly learning how to troubleshoot various issues. Her printer does not have a functioning LCD screen. She was encouraged to use the Print from USB option, but we are not 100% certain how we change z offset values and other settings that are normally accessible on that screen. Suggestions appreciated.

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Hi @p_maidenitrt .

If changing or fixing the LCD screen is not feasible, you can change any and all settings using so called ‘G-Codes’.

You literary write (or copy paste) a gcode and click send over USB and the JellyBOX will respond.

For example M851 Z-1 will set the Z probe offset to -1.

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A great piece of software for this is Prinrun - it has a very nice ‘gcode terminal’. Connect to a computer with Printrun via USB


Here’s an extensive list of gcodes and what they do


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Priscilla May-Maiden will be eternally grateful.