Extended Monitoring Of The Synchronism Difference; Referencing And Synchronization Of Gantry Axes - Siemens SINUMERIK 840D Function Manual

G1: Gantry axes
9.2 "Gantry axes" function
9.2.3

Extended monitoring of the synchronism difference

Activation of the extended monitoring
An extended monitoring of the synchronism difference can be activated using the following
machine data:
MD37150 $MA_GANTRY_FUNCTION_MASK, Bit 0 = 1
For the extended monitoring, a synchronism difference between the leading and synchronous
axis, obtained when tracking or when the gantry grouping is opened, is taken into account.
The extended monitoring becomes active after the NC boots after the first referencing
(incremental encoder) or synchronization (absolute encoder).
Exceeding the gantry trip limit
If, when the extended monitoring is active, the trip limit of the synchronism difference is
exceeded, Alarm 10653 "Error limit exceeded" is displayed.
In order to be able to reset the alarm, proceed as follows:
1. Deactivating extended monitoring:
MD37150 $MA_GANTRY_FUNCTION_MASK, Bit 0 = 0
2. Deleting the synchronism difference displayed in the machine data:
MD37135 $GANTRY_ACT_POS_TOL_ERROR = 0
3. Cancel alarm
4. Re-reference or re-synchronize the axes of the gantry grouping
5. Reactivating extended monitoring:
MD37150 $MA_GANTRY_FUNCTION_MASK, Bit 0 = 1
9.2.4

Referencing and synchronization of gantry axes

Application
In cases where an incremental measuring system is being used for the guide axis or the
synchronous axis, the measuring systems must be referenced during NC run-up, while
maintaining the axis coupling.
After every axis in the gantry grouping has approached its reference point, any misalignment
that may exist between the axes must be eliminated (gantry synchronization process). Once
this has been done, the NC/PLC interface signal is set:
DB31, ... DBX101.5 = 1 (gantry grouping is synchronized)
For the sequence when referencing or synchronizing gantry axes, see Chapter "Referencing
and synchronization of gantry axes (Page 264)".
262
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA