Operating Modes
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
Baumüller Nürnberg GmbH
564
3.8
m
Phase 1
In Phase 1, Homing speed (
) is used until the Reference switch is reached.
The acceleration to reach the homing speed is adjusted with
Homing accel-
eration.
Starting occurs directly with Phase 2 if the switch has already been set during commis-
sioning.
m
Phase 2
After the reference switch has been reached, the drive is braked with
Homing
deceleration and one eight of the homing speed (however, at least to the homing final
speed) in the reverse direction of travel. It will now be driven out of the switch again.
m
Phase 3
The falling switch edge of the switch will trigger braking to the
Homing final
speed. As soon as this speed has been reached, the zero mark will be evaluated. The
drive runs with the homing final speed until the zero pulse or zero angle of the encoder
is detected. When the zero pulse or zero angle is recognized, the drive will be stopped
and the home position will be set.
Maximum travel distance can be preset at encoders with zero pulse in this phase. If the
zero pulse is not detected within this distance, "Homing" error no. 901 is reported and
homing is interrupted.
3.8.3.2 Shifting the zero angle
When referencing under consideration of the Zero angle or Zero pulse, it may be near the
switch tolerances of the reference switch. This may result in the detection of two different
home positions with multiple homing runs that are one revolution apart. The zero angle
or zero pulse is then not always recognized in the same encoder revolution due to the
switch tolerances.
With Incremental encoders with zero pulse the encoder or switch must in this case be
mounted differently so that the zero pulse is no longer near the switch tolerances.
With absolute encoders, the encoder zero angle can be offset using Parameter
encoder offset for internal calculation so that it is outside of the tolerances of the switch.
The measured angle on the reference switch is indicated in Parameter
me-
chanical angle on the Reference switch.
3.8.3.3 Maximum distance for zero pulse detection
A maximum distance can be preset at encoders with zero pulse, which may be moved
after the switching edge until the zero pulse is detected.
If the zero pulse is not detected within this distance, "Homing" error no. 901 homing is
reported and homing is interrupted.