A3: Axis Monitoring, Protection Zones
2.3 Protection zones
Basic Functions
122
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Enabling of workpiece-related protection zones
When a workpiece-related protection zone has been violated, the operator can enable it temporarily with NC start
in the AUTOMATIC and JOG modes so that it can be traversed. This clears the alarm and travels into the
protection zone in the AUTOMATIC and MDI operating modes.
Only workpiecerelated protection zones can be enabled temporarily with NC start and traversed by all
toolrelated protection zones including the programmed path.
If on
NC-START
the preactivated tool or workpiecerelated protection zone is deactivated by the PLC after the
alarm, machining is continued without the protection zone being enabled temporarily.
If a fully operative, preactivated protection zone causes a machining interruption and the output of an alarm
owing to protection-zone violation, machining can be resumed on NC start if the PLC makes the zone inoperative
again.
If enabling of a protection zone is to be safeguarded better than with a simple NC start, NC start must be disabled
or made dependent on other conditions in the PLC user program when this alarm is triggered.
If the user does not want to permit overrunning the protection zone, he can terminate the traversing movement
with
NC RESET
.
If several protection zones are violated at the same time by the movement, acknowledgment is required for each
of these protection zones. With NC start the individual protection zones can then be enabled one after the other.
Application for temporary enabling:
Drilling a turned part: The drill is allowed to enter the protection zone of the spindle chuck.
Monitoring of overlaid motion
On preparation of the NC blocks, part of the offsets of geometry axes resulting from the overlaid motions are
taken into account.
If further offsets occur that could not be taken into account on preparation of the blocks, the channelspecific PLC
interface signal is set.
DB31, ... DBX39.0 (protection-zone monitoring not guaranteed).
This signal is set while offsets are active that cannot be taken into account. The signal can be set and reset within
a block.
Simultaneously with the PLC interface signal, a selfcanceling alarm 10704 "Protection-zone monitoring is not
guaranteed" is output.
The following overlaid motions of geometry axes are taken into account in the preparation of blocks:
1. DRF offsets
2. Work offsets external
3. Fine tool offsets
4. Rapid retraction
5. Offsets generated by compile cycles
6. Oscillation
7. Concurrent positioning axes
8. Positioning axes
Содержание SINUMERIK 828D Turning
Страница 34: ...Basic Functions 34 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 146: ...A3 Axis Monitoring Protection Zones 2 6 Data lists Basic Functions 146 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 328: ...F1 Travel to fixed stop 6 5 Data lists Basic Functions 328 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 816: ...K2 Axis Types Coordinate Systems Frames 10 9 Data lists Basic Functions 816 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 1198: ...P4 PLC for SINUMERIK 828D 14 6 Function interface Basic Functions 1198 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 1752: ...Appendix 20 2 Overview Basic Functions 1752 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...
Страница 1774: ...Glossary Basic Functions 1774 Function Manual 09 2011 6FC5397 0BP40 2BA0 ...