Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA1, 01/2014
99
8.10.5
Corner behavior: G450, G451
Functionality
By using the functions G450 and G451, you can set the behavior for a non-continuous transition from one contour element
to another contour element (corner behavior) when G41/G42 is active.
The internal and external corners are detected by the control system itself. For internal corners, the intersection of the
equidistant paths is always approached.
Programming
G450
; Transition circle
G451
; Point of intersection
See the following illustration for corner behavior at an external corner:
See the following illustration for corner behavior at an internal corner:
Transition circle G450
The tool center point travels around the workpiece external corner in an arc with the tool radius.
In view of the data, for example, as far as the feedrate value is concerned, the transition circle belongs to the next block
containing traversing movements.
Point of intersection G451
For a G451 intersection of the equidistant paths, the point (intersection) that results from the center point paths of the tool
(circle or straight line) is approached.
With acute contour angles and active point of intersection, depending on the tool radius, unnecessary idle motions could
result for the tool.
In this case, the control system switches to transition circle for this block automatically if a certain set angle value (100°) is
reached.
