Maintenance/repair
Maintenance operations
Adjustment of the resolver using synchronous servo motors/rotor position adjustment
9
50
BA33.0001 EN 2.0
9.2.1 Adjustment of the resolver using synchronous servo motors/rotor position adjustment
The factory settings of the Lenze resolver ensure trouble-free operation without
adjustment at the controller.
If the resolver is in the wrong position, e.g. after working on the m otor, it will have to be
realigned or the rotor will have to be adjusted via the controller.
ƒ
For the
rotor adjustment
, the motor must be free of load and able to rotate with
the controller (
E
operating instructions of contr oller). The r otor adjustment is saved
in the controller and only applies for the respective motor-controller combination.
ƒ
Resolver adjustment
1. If necessary, release the brake and free end of motor shaft.
2. Connect the resolver to the drive controller and determine current rotor position (
E
Operating instructions for drive controller).
3. Allow DC current (< I
N
of motor ) to flow from phase V (positive connection) to phase
W (negative connection), phase U is without current.
4. Turn the resolver stator so that the controller displays the rotor position ”0”.
5. Fasten the resolver stator in this position.
9.2.2 Temperature control for servo motors
You must determine the actual winding temperature at a surface temperature > 140 °C:
ƒ
Measuring method: 4-phase r esistance m easur ement at motor power terminal
ƒ
The resistance measurement must be performed as quickly as possible after
switching off and stopping the servo motor.
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