Configuration
Parameter manual b maXX BM3000
Document no.: 5.12001.07 Baumüller Nürnberg GmbH
192
of 820
4.4
137.6 M0-offset revolutions
Absolute distance (revolution fraction, only). Offset between the encoder coordinate sys-
tem and the machine coordinate system.
The absolute distance is the offset between the encoder coordinate system (of the encod-
er actual value as it is read from the absolute value encoder Z106.5– and Z106.6–) and
the position coordinate system (Z106.10– / Z106.11– / Z106.12–). The M0-Offset is
added to the read encoder actual value at each initialization. Due to this, the requested
position coordinate system (machine coordinate system) results directly.
Figure 89: Absolute value offset
Homing sets the M0-Offset automatically (see ZAutomatic setting of the absolute value
offset at homing– on page 586).
It only makes sense to use an M0-Offset with absolute value encoders. Furthermore, the
encoder's range must cover the total traversing range of the drive.
It can be selected at addition of the M0-Offset, whether the range (Z137.2– Number of
Revolutions) which is clearly represented by the encoder should be taken into account or
not. This is defined in parameter
Z106.3– Encoder options bit 7.
If the represented range should be taken into account, an overflow occurs at addition of
the M0-Offset at
Z137.2– Number of Revolutions. In this case the parameter Z137.6–
M0-Offset Revolutions is ineffective at singleturn encoders.
A change of the M0-Offset takes effect after switching on or after an encoder initialization.
The M0-Offset is not influenced when writing the parameters.
137.7 M0-sector position initiator
Offset of the position zero proximity switch for the machine zero position.
137.8 Encoder operating hours
Encoder Operating Hours
0
0
Encoder
coordinates
Position
coordinates
M0 offset
Reference point
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