Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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A3: Axis Monitoring, Protection Zones
2.3 Protection zones
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
113
Figure 2-12 Examples: convex and concave tool-related protection zones
Contour elements
The following contour elements are permissible:
•
G0
,
G1
for straight contour elements
•
G2
for circle segments in the clockwise direction
Permissible only for workpiece-related protection zones.
Not permissible for tool-related protection zones because they must be convex.
•
G3
for circular segments in the counter­clockwise direction
A protection zone cannot be described by a complete circle. A complete circle must be divided into two half
circles.
The sequence
G2
,
G3
or
G3
,
G2
is not permitted. A short
G1
block must be inserted between the two circular
blocks.
Constraints
During the definition of a protection zone, the following functions must not be active or used:
• Tool radius compensation (cutter radius compensation, tool nose radius compensation)
• Transformation
• Reference point approach (
G74
)
• Fixed point approach (
G75
)
• Dwell time (
G4
)
• Block search stop (
STOPRE
)
• End of program (
M17
,
M30
)
• M functions:
M0
,
M1
,
M2
Programmable frames (
TRANS
,
ROT
,
SCALE
,
MIRROR
) and configurable frames (
G54
to
G57
) are ineffective.
Inch/metric switchovers with
G70
/
G71
or
G700
/
G710
are effective.
)
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