Cancels all motion.
G80 is a G-code used to cancel the current motion mode. It is used to return the machine to the default motion mode, which is typically linear interpolation (G01). This command is used to cancel any motion mode that was previously activated such as canned cycle (G81-G89).
For example, if a G-code program is currently executing a drilling cycle (G81) and you want to return to linear interpolation (G01), you would use G80 to cancel the drilling cycle and return to the default motion mode.
G80
G80