Baumuller b maXX BM2500, Operating Manual

Page: 192 / 822

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
Z
106.5
–
and
Z
106.6
–
) and
the position coordinate system (
Z
106.10
–
/
Z
106.11
–
/
Z
106.12
–
). 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
Z
Automatic 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 (
Z
137.2
–
Number of
Revolutions) which is clearly represented by the encoder should be taken into account or
not. This is defined in parameter
Z
106.3
–
Encoder options bit 7.
If the represented range should be taken into account, an overflow occurs at addition of
the M0-Offset at
Z
137.2
–
Number of Revolutions. In this case the parameter
Z
137.6
–
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