What is the difference between sharing the fourth axis and nc dials?

First, the difference between the fourth axis indexing plate and CNC indexing plate

The function of the fourth axis is to stop the continuous rotation, feed movement or rotation indexing adjustment according to the signal or instruction sent by the control system, and then make the CNC machine tool can complete the procedures to be processed in accordance with the request. The fourth axis usually and vertical machining center and CNC milling machine stop matching, can function in the T axis and set of items stop processing. The fourth axis can be controlled by an independent control program or installation, of course, according to the relevant interface through the host computer system or installation complete control. After using the fourth axis in the device, consumption efficiency and processing effect and quality of processed goods can be rapidly improved.