Siemens SINUMERIK 828D Function Manual page 90

A3: Axis Monitoring, Protection Zones
2.2 Axis monitoring
The function behaves as follows:
• MD36052 $MA_STOP_ON_CLAMPING = 'H03'
No longer has an effect.
The travel command is set in Look Ahead mode only for blocks with active continuous­path mode. M82
generates a stop and thus interrupts the continuous­path mode. The Look Ahead stopping on N410 would not
be necessary because stopping occurs anyway.
• MD36052 $MA_STOP_ON_CLAMPING = 'H04'
Generates a stop irrespective of M83, which is executed as a function of "feedrate override 0%". The axis is
thus stopped before the first machining block.
Note
MD36052 $MA_STOP_ON_CLAMPING = 'H01' or 'H04'
Both functions can be used irrespective of the clamping of axes:
•
•
Both functions ensure that the path motion in continuous-path mode is already stopped
before the start of the relevant part-program block and not just within the part-program
block.
Block-change criterion: Clamping tolerance
After activation of clamp monitoring:(DB31, ... DBX2.3 = 1) the block-change criterion for traversing blocks, in
which the axis stops at the end of the block, no longer acts as the corresponding exact-stop condition but the
configured clamping tolerance:
MD36050 $MA_CLAMP_POS_TOL (clamping tolerance with interface signal "Clamping active")
Behavior upon releasing of the clamp
If the axis was moved by the clamping process, it is returned by the NC to the position setpoint after releasing of
the clamp and setting of the servo enable state. Repositioning depends on whether "Follow-up mode" was
activated for the axis:
Without follow-up mode:
With follow-up mode:
90
MD36052 $MA_STOP_ON_CLAMPING = 'H01'
Generates a Look Ahead stop for the path motion if no servo enable signal is active for
the relevant axis.
MD36052 $MA_STOP_ON_CLAMPING = 'H04'
Generates a Look Ahead stop for the path motion if the feed rate overrate = 0% at the
transition from the part-program blocks with rapid traverse to part-program blocks
without rapid traverse.
Repositioning by position controller
Repositioning by interpolator
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions