Trouble Shooting - Kollmorgen AKM Series Instruction Manual

Setup
15.3

Trouble Shooting

The following table is to be seen as a "First Aid" box. There can be a large number of dif-
ferent reasons for a fault, depending on the particular conditions in your system. The fault
causes described below are mostly those which directly influence the motor. Peculiarities
which show up in the control loop behaviour can usually be traced back to an error in the
parameterization of the servo amplifier. The documentation for the servo amplifier and the
setup software provides information on these matters.
For multi-axis systems there may be further hidden reasons for faults.
Fault
Motor doesn't
rotate
Motor runs away
Motor oscillates
Error message:
brake
Error message:
output stage fault
Error message:
resolver
Error message:
motor temperature
Brake does not
grip
English - 54
04/2013
Possible cause
— Servo-amplifier not enabled
— Break in setpoint lead
— Motor phases in wrong sequence
— Brake not released
— Drive is mechanically blocked
— Motor phases in wrong sequence
— Break in the shielding of the resolver cable
— amplifier gain to high
— Short-circuit in the supply voltage lead to
the motor holding brake
— Faulty motor holding brake
— Motor cable has short-circuit or earth short
— Motor has short-circuit or earth short
— Resolver connector is not properly plugged
in
— Break in resolver cable, cable crushed or
similar
— Motor thermostat has switched
— Loose resolver connector or break in
resolver cable
— Required holding torque too high
— Brake faulty
— Motor shaft axially overloaded
Kollmorgen
Measures to remove the cause of the
fault
— Supply ENABLE signal
— Check setpoint lead
— Correct the phase sequence
— Check brake controls
— Check mechanism
— Correct the phase sequence
— Replace resolver cable
— use motor default values
— Remove the short-circuit
— Replace motor
— Replace cable
— Replace motor
— Check connector
— Check cables
— Wait until the motor has cooled
down. Then investigate why the
motor becomes so hot.
— Check connector, replace resolver
cable if necessary
— Check the dimensioning
— Replace motor
— Check the axial load, reduce it.
Replace motor, since the bearings
have been damaged
Servomotors AKM