112 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS23x, 34x, 43x
6.5 Zero search modes
Zero point offset Example.
Setup done before start:
- Zero search velocity = -128 rpm
- Zero search position = - 10000 counts
6.5.8 Zero search with index pulse (only MISxxxH2xx)
If the MIS motor is equipped with the single turn H2 encoder option, it is also possible to
use the index pulse of the encoder. This gives a more precise zero position than just run
-
ning for a sensor. The accuracy of the sensor signal depends on how far the sensor is lo-
cated from the measuring item and on the velocity.
The index pulse can be used with or without the sensor. This must be defined on the
advanced tab. If the MIS motor is set to use the index pulse, the MIS motor always runs
to the sensor first and then the index pulse.
The sensor must be placed at the right position. This can be done using MacTalk. Select
the type of sensor movement to be used in the main tab screen. In the advanced tab,
choose not to start the program automatically after reset. Then select Save in Flash. Go
to the Test tab and press “Start Zero Search”. The motor now rotates at the zero search
velocity towards the sensor and when this has been found the motor continues to the
index pulse. The circle at the Test tab indicates the location of the index pulse according
to the sensor. The index pulse must be in the green area. If the index pulse is in the red
area, the sensor must be moved slightly and the procedure repeated.
TT2192-02GB
The motor moves in negative
direction with 128 RPM defined by
« » settingZero search velocity
Step 1
Step 2
START
The motor moves in positive direction with 2 RPM which is
1/64 of the defined «Zero Search Velicity» and the actual
position counter is set to the «Zero Search position» which
is -10000 count..
Zero search sensor
Position before zero search
(“Sensor Type 2”)
Motor decelerate and stops behind the sensor
Step 3
The motor is set back in the selected «Start up mode» which
in this example is «Position mode». Since the target position
is default 0 it moves to position 0 and stops. The zero search
is finished !
Index pulse
Sensor
Zero
search
velocity
1 rev. of motor
Index pulse range
Index puls
TT2209GB
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