The CNC can cut in many different materials, and create different shapes.
the CNC either runs a program which reads instructions from g-code, or takes user input through the keyboard. controlling the CNC from the keyboard is called jogging, and this is rarely used to cut trough material.
jogging is mostly used to verify that the g-code will run withouth problems and to calibrate the CNC before execution of the g-code.
as the progam runs the g-code, each line contains a command (or comment, which will be ignored by the program)
the program may need user interactions for events such as tool-change.

Security-rules

Specification

some hints:

Max travel does not determine the maximum dimension of the piece you can manufacture, you have to take into acount that the tool has a diameter which you need to subtract from max "work-area".
It's recomended to not attempt to manufacture a piece bigger than 110x400mm in one run.
If you need to manufacture a piece bigger than 110 in both x and y direction, you may manufacture it in two runs ( but this is difficult and time-consuming).