General Information For Setting The Commutation - Siemens SINAMICS S120 Commissioning Manual
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Commissioning
2.13 Commissioning SIMOTICS 1FW6 built-in torque motors
2.13.3
General information for setting the commutation
You can use the following two pole position identification techniques for all frame sizes of
SIMOTICS T-1FW6 built-in torque motors:
● The motion-based technique
● The saturation-based technique (1st harmonic)
Note
Fine synchronization is recommended for precise commutation
Use either a measuring system with a zero mark that can be evaluated or an absolute
measuring system.
Motion-based technique
This technique can also be used during commissioning when the commutation angle offset is
initially determined or when it is checked in conjunction with an absolute measuring system
(e.g. RCN 85xx from Heidenhain).
The procedure can be applied for vertical and horizontal axes whose load cannot be reduced
in an uncontrolled manner when the machine is disconnected from the power supply. In this
case, the axes must be able to be freely moved and not be braked. (static friction < 10% of
the rated motor torque).
In the worst-case scenario, the rotor can move in the range of ± 5 degrees when this
technique is used.
For inclined and horizontal axes, the load may be reduced in an uncontrolled manner if the
center of gravity is outside the rotary axes when the system is disconnected from the power
supply. At certain times the axes angle cannot be monitored.
Carefully take this into account when you use the motion-based technique.
172
WARNING
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual
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