1) on the knife A, select the correct wheel B, choose the correct grinding wheel grinding direction, can not reverse…
In milling, ramping has gradually grown more significant. The speed and precise interpolation of modern CNC machines make it possible for a small tool to mill out a much larger hole or pocket in a relatively short time. Ramping is an important element of doing this. Either the tool ramps from one level of passes to the next within the feature or else it follows a helical path at a continuous angle all the way down to the feature’s depth.
Limitations on the ability to ramp generally result from the tool. Many end mills that are able to ramp were not necessarily designed to emphasize this type of cutting. When the tool is designed with ramping in mind, various features change.
The manager offers some elaboration on this. His company’s “Mill 1” end mill is an example of a tool designed for ramping and other aspects of milling within holes and pockets.
The most fundamental design consideration is greater clearance beneath the insert, he says. The clearance lets the tool ramp in at a steeper angle and reaches the bottom of the feature sooner, potentially reducing machining time.
Other considerations relate to quality. As the tool removes material from the hole or pocket, it also leaves behind an inner wall. If the tool can leave this wall surface smooth enough, then an extra boring or finish milling operation might be avoided.