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S1: Spindles

16.3 Reference / synchronize

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

1285

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 synchronized with

the next zero mark of the position measurement system or with the next Bero signal.

• The spindle is to be positioned from standstill using SPOS, M19 or SPOSA. The spindle 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.

• The spindle can be synchronized from the movement (after M3 or M4) using SPOS, M19 or 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 a negative

or positive direction of motion. If necessary, the direction of motion is inverted prior to positioning.

• Crossing the zero mark in JOG mode by means of direction keys in speed control mode.

Note

If does not make any difference whether the synchronization procedure is initiated from

the part program, FC18 or synchronized actions.

Note

During synchronization of the spindle, all four possible home position values are effective

depending on the measuring 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/destination point for a distancecoded system)

• MD34090 $MA_REFP_MOVE_DIST_CORR

(Reference point offset/absolute offset, distancecoded)

• MD34100 $MA_REFP_SET_POS

(Reference point value, with distance-coded system without any significance)

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:

DB31, ... DBX17.5 (resynchronize spindle when positioning 2)

DB31, ... DBX17.4 (resynchronize spindle when positioning 1)

Siemens SINUMERIK 828D Function Manual

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