numerical control axis Synchronization Multi Axis Motion Control protocol time clock

 positive rising edge

 Differential Signaling

positive rising edge Differential Signaling numerical control axis Synchronization Multi Axis Motion Control protocol  time clock 

CNC time Synchronization Channel Synchronization Multi-Channel

Serial   numerical control axis Synchronization  Axis

FUZZY position numerical control axis Synchronization Axis

precision time protocol IEEE 1588 Precision Time Protocol in ITU-T Standards

https://en.wikipedia.org/wiki/Clock_synchronization

Cristian's Algorithm clock synchronization algorithm