128 - PVD 3622_GB_TM_January 2014.Docx
4.6. Troubleshooting
Some symptoms and their possible causes are listed below. This list is not
comprehensive. Whenever an operating incident occurs, consult the relevant servo
drive installation instructions (the troubleshooting display indications will help you in
your investigation) or contact us at:
http://www.parker.com/eme/repairservice
You note that the motor
does not turn by hand
when the motor is not
connected to the drive.
Check there is no mechanical blockage or if the motor
terminals are not short-circuited.
You have difficulty
starting the motor or
making it run
If there is a thermal protector, check it and its connection
and how it is set in the drive.
Check the servomotor insulation (in doubt, measure when
the motor is hot and cold.
The minimum insulation resistance measured under 50VDC
max is 50 MΩ :
-
Between phase wire and housing,
-
Between thermal protector and housing,
- Between resolver winding and housing.
You find that the motor
speed is drifting
Adjust the offset of the servo drive.
You notice that the
motor is racing
Check the speed set-point of the servo drive.
Check you are well and truly in speed regulation (and not in
torque regulation).
Check the encoder setting
You notice vibrations
Check the encoder and tachometer connections, the earth
connections (carefully) and the earthing of the earth wire,
the setting of the servo drive speed loop, tachometer
screening and filtering.
Check the stability of the secondary voltages.
Check the rigidity of the frame and motor support.
You think the motor is
becoming unusually hot
It may be overloaded or the rotation speed is too low :
check the current and the operating cycle of the torque
motor
Friction in the machine may be too high :
- Test the motor current with and without a load.
- Check the motor does not have thermal insulation.
Check the cooling circuit
You find that the motor
is too noisy
Several possible explanations :
Unsatisfactory mechanical balancing
Defective coupling
Loosening of several pieces
Poor adjustment of the servo drive or the position loop :
check rotation with the loop open.
The motor is warmer on
its top
Air bubbles can be stocked in the water cooling circuit. You
need to purge the circuit or to double the water flow rate during
10 minutes to remove the air bubbles.
Summary of Contents for TM Series
Page 1: ...1 PVD 3622_GB_TM_January 2014 Docx Torque Motors TM Series Technical Manual PVD 3622...
Page 57: ...57 PVD 3622_GB_TM_January 2014 Docx 3 3 1 2 Shaft Height 200 mm Thrust bearing 29424...
Page 61: ...61 PVD 3622_GB_TM_January 2014 Docx 3 3 2 2 Shaft Height 315 mm Thrust Bearing 29426...
Page 62: ...62 PVD 3622_GB_TM_January 2014 Docx 3 3 2 3 Shaft Height 315 mm Thrust Bearing 29430...
Page 66: ...66 PVD 3622_GB_TM_January 2014 Docx 3 3 3 2 Shaft Height 400 mm Thrust Bearing 29434...
Page 67: ...67 PVD 3622_GB_TM_January 2014 Docx 3 3 3 3 Shaft Height 400 mm Thrust Bearing 29440...