Behavior At Outer Corners - Siemens SINUMERIK 840D sl Function Manual

W5: 3D tool radius compensation - 840D sl only
23.2 Circumferential milling
Figure 23-6
23.2.2

Behavior at outer corners

In the same manner as 21/2D tool radius compensation procedures, a circle is inserted at outer
corners for G450 and the intersection of the offset curves is approached for G451.
With nearly tangential transitions, the procedure for active G450 is as with G451 (limit angle
is set via machine data). Conversely, if G451 is active, a circle is also inserted (procedure as
for G450) if there is no intersection or if the corner angle exceeds a specific value (MD).
If there is a change in orientation between the two traversing blocks, a circle is always inserted.
G450
Outside corners are treated as if they were circles with a 0 radius. The tool radius compensation
acts on these circles in the same way as on any other programmed path.
The circle plane extends from the final tangent of the first block to the start tangent of the
second block.
The orientation can be changed during block transition.
A change in orientation between two programmed blocks is executed either before the circle
block or in parallel to it. Circles are always inserted. The command DISC is not evaluated.
Programming
● ORIC: Change in orientation and path movement in parallel
(ORIentation Change Continuously)
● ORID: Change in orientation and path movement consecutively
(ORIentation Change Discontinuously)
The ORIC and ORID program commands are used to determine whether changes in orientation
programmed between two blocks are executed before the inserted circle block is processed
or at the same time.
776
Change of corner type during machining
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions