HEIDENHAIN iTNC 530 HSCI - Possibilities for Determining the Field Angle

1110 HEIDENHAIN Technical Manual iTNC 530 HSCI
7.9.1 Possibilities for determining the field angle
There are various possibilities for determining the field angle:
 The field angle is determined automatically when the drive is switched on,
without any motion of the motor. The method of determination is set in
MP2250.x. The field angle is stored after it has been determined. This field
angle is used when the motor is switched on again. The FIELD ORIENT. soft
key has no function.
 By pressing the FIELD ORIENT. soft key once while the motor is being
commissioned. The soft key appears in the Commissioning Current
Controller operating mode. After pressing it, the motor moves. The field
angle is determined and stored during this motion. This field angle is used
when the motor is switched on again. A plausibility test is run during the
field angle determination.
 Select the method for field angle determination in MP2254.x.
HEIDENHAIN recommends using MP2254.x = 2 when commissioning new
drive systems (such as machine prototypes), because the plausibility tests will
be run. After successful commissioning, MP2254.x = 0 can be used to save
time (such as for series production of the machine).
In certain cases it can be of advantage to determine the field angle via
MP2254.x = 3. This mode can be used if
 there are no brakes,
 in the Commissioning Current Controller mode of operation, where the
brakes are always open,
 the user ensures that the brakes can be opened manually or with the PLC.
MP2254.x Determining the field angle
Input: 0: Field angle is determined during operation; soft key has no
function (without plausibility test)
2: Field angle determination via soft key, motor motion is
permitted (with plausibility test)
3: Same as 2, but the drive must no longer be switched on by
the PLC. The drive is moved immediately after the
FIELD ORIENT. soft key is pressed.
Attention
This method cannot be used for hanging axes (with 100 % weight
compensation), since the brakes are not applied and the monitoring
functions are deactivated!
Note
For synchronous spindles, the field angle should be determined via the
FIELD ORIENT. soft key (MP2254.x = 2), since this is a more exact
determination.