Tool Withdrawal After Power Off With Orientation Transformation - Siemens SINUMERIK 828D Function Manual

9.14.1

Tool withdrawal after POWER OFF with orientation transformation

Function
If processing with tool orientation is interrupted (e.g. as a result of power failure), the transformation which was
previously active can be reselected after POWER ON to generate a frame towards the tool axis. The tool can
then be retracted in JOG mode by means of a retraction movement towards the tool axis.
Precondition
This procedures requires valid axis positions after POWER ON which are either delivered by absolute encoders
or by the function "Position restoration with POWER ON [Page 1220]".
Parameter assignment
Last active transformation should be kept after POWER ON
This functionality is activated using the MD setting:
MD20144 $MC_TRAFO_MODE_MASK, Bit 1 = 1
In addition, the following bits must be set:
MD20110 $MC_RESET_MODE_MASK, bit 0 = 1 and bit 7 = 1
For the significance of MD20144 and 20110, see "System settings for power-up, RESET/part-program end and
part-program start [Page 628]".
NC language command WAITENC
For axes, which should be taken into account with WAITENC (see section "Programming") the following axis-
specific machine data must be set to "1":
MD34800 $MA_WAIT_ENC_VALID = 1
Programming
In the user program (.../_N_CMA_DIR/_N_PROG_EVENT_SPF) to be called event-controlled when powering up
(precondition: MD20108 bit 3 = 1), the system must wait using the NC language command WAITENC until the
valid axis positions are available.
A frame that positions the tool axis in the direction of the X, Y or Z axis can then be generated using the NC
language commandTOROTX/TOROTY/TOROTZ.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K1: Mode group, channel, program operation, reset response
9.14 System settings for power-up, RESET/part-program end
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