1058 HEIDENHAIN Technical Manual MANUALplus 620
6.19.8 Field orientation
General
Information
If a linear, torque or synchronous motor is used with an incremental encoder
without a Z1 track or an unaligned encoder with EnDat interface, there is no
assignment between the encoder and the rotor magnets. The field angle must
be determined before this motor can be moved.
The MANUALplus 620 uses the "field orientation" function to determine the
field angle for the motors listed above. The assignment between the encoder
and the rotor magnet (field angle) is determined and stored.
Regarding the motor.mot motor table, the field orientation must be performed
for the following drives:
Linear motor with absolute encoder with EnDat interface (SYS = 3)
Synchronous or torque motor with unaligned rotary encoder with EnDat
interface (SYS = 5)
Synchronous or torque motor with incremental rotary encoder without Z1
track (SYS = 6); one reference mark per revolution
Synchronous or torque motor with incremental rotary encoder with
distance-coded reference marks (SYS = 7)
Linear motor with incremental linear encoder with distance-coded reference
marks (SYS = 8)
Synchronous or torque motor with unaligned rotary encoder with EnDat 2.2
interface (SYS = 10)
The "field orientation" function can be performed only if the current
controller is already adjusted!
Absolute encoder with EnDat interface Incremental encoders
As soon as the absolute position of the encoder
has been read, the absolute position and
determined field angle are assigned to each other.
The field angle is assigned to the zero position of
the encoder.
After switching on the drive, the motor orients
itself (rough orientation; the message Finding
the field angle appears). The drive is ready for
operation after this procedure. The field angle is
determined and assigned as soon as the
reference mark/s is/are traversed during the first
motor motion.
If the speed encoder is exchanged, the Field Orientation function must be
rerun.
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