Siemens SINUMERIK 840D sl Function Manual page 884

S3: Synchronous spindle
14.1 Brief description
The "0° position" of a position-controlled spindle is calculated as follows:
● from the zero mark or Bero signal of the measurement system and
● from the reference values saved using axis-specific machine data:
Range of POS
References:
/FB1/ Function Manual, Basic Functions; Reference Point Approach (R1)
Read current angular offset
Using axial system variables, it is possible to read the current position offset between the FS
and LS in the NC parts program. The following two position offsets exist:
● Current position offset of setpoint between FS and LS
● Current position offset of actual value between FS and LS
(Explanation of <axis identifier>, see section "Synchronous operation")
Activation after power ON
Synchronous mode can also be activated with non-referenced/synchronized FS or LS (IS
"Referenced/synchronized 1 or 2" DB31, ... DBX60.4 or DBX60.5 = 0). In this case, a
warning message is displayed.
Example:
LS and FS are already coupled in a friction lock via a workpiece after power ON.
884
MD34100 $MA_REFP_SET_POS, reference point value,
of no significance with interval-coded systems.
MD34080 $MA_REFP_MOVE_DIST reference point distance/target point
with interval-coded systems,
MD34090 $MA_REFP_MOVE_DIST_CORR reference point offset/absolute offset with
interval coding.
: 0 ... 359,999°.
FS
$AA_COUP_OFFS [<axis identifier for FS>]
$VA_COUP_OFFS [<axis identifier for FS>]
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions