Siemens SINUMERIK 840D sl Function Manual page 1644

Detailed Description
2.2 Homing /synchronizing
Synchronization procedure
When the spindle is switched on, the spindle can be synchronized as follows:
• The spindle is started with a spindle speed (S value) and a spindle rotation (M3 or M4) and
• The spindle is to be positioned from standstill using SPOS, M19 or SPOSA. The spindle
• The spindle can be synchronized from the movement (after M3 or M4) using SPOS, M19 or
• If does not make any difference whether the procedure is initiated from the part program,
• Crossing the zero mark in JOG mode by means of direction keys in speed control mode.
Note
During synchronization of the spindle, all four possible reference point values and
reference point offsets are effective as appropriate to the measurement system selected.
The measurement system offset has the same effect.
The following machine data must be observed:
MD34080 $MA_REFP_MOVE_DIST
(Reference point distance/end point for distancecoded system)
MD34090 $MA_REFP_MOVE_DIST_CORR
(Reference point offset/absolute offset, distancecoded)
MD34100 $MA_REFP_SET_POS
(reference point value, of no relevance in the case of distance-coded system).
If a non-homed spindle with SPOS=IC(...) and a path < 360 degrees is positioned, it
may be the case that the zero mark is not crossed and the spindle position is still not
synchronized with the zero mark.
This can happen:
- After POWER ON
- By setting the axial NC/PLC interface signals:
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synchronized with the next zero mark of the position measurement system or with the
next Bero signal.
synchronizes with the next zero mark of the position measurement system or with the
next Bero signal. It is then positioned to the programmed position.
SPOSA.
The responses are as follows:
– With SPOS = Pos, SPOS = DC(Pos) and SPOS = AC(Pos), the direction of motion
is retained and the position is approached.
– With SPOS = ACN(Pos) or SPOS = ACP(Pos), the position is always approached
with negative or positive direction of motion. If necessary, the direction of motion is
inverted prior to positioning.
FC 18 or synchronized actions.
DB31, ... DBX17.5 (Resynchronize spindle during positioning 2)
and
DB31, ... DBX17.4 (Resynchronize spindle during positioning 1)
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0