Siemens SINUMERIK 840D Function Manual page 286

G1: Gantry axes
9.8 Examples
DB31, ... DBB101.7 = 1 (gantry axis)
In addition, the following steps must be taken:
● RESET
● Read off values in machine coordinate system:
e. g.
X = 0.941
Y = 0.000
XF = 0.000
● Enter the X value of master axis 1 with inverted sign in the machine data of slave axis 3:
MD34090 $MA_REFP_MOVE_DIST_CORR = - 0.941 (reference point offset/absolute
offset)
Note
This machine data is effective after power ON. To avoid having to perform a power ON now,
the value can also be entered in the following machine data:
MD34080 $MA_REFP_MOVE_DIST (reference point distance)
This machine data is then valid after a RESET.
● Start referencing again for axis 1 (master axis) with the modified machine data
● Wait until message "10654 Channel 1 Waiting for synchronization start" appears
● At this point in time, the NC has prepared axis 1 for synchronization and registers this at the
interface signal:
DB31 DB31, ... DBB101.4 = 1 (synchronization process ready to start)
DB31, ... DBB101.6 = 1 (leading axis LA)
DB31, ... DBB101.7 = 1 (gantry axis)
● Examine actual positions of machine. Case A or B might apply:
Figure 9-3
286
Possible results after referencing axis 1 (master axis)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA