Fault correction
The following table describes a selection of faults. Depending on the application, other causes may be responsible for the fault. Conspicuous control behavior is the result of incorrect parameterization of the servo drive.
With multi-axis systems such as the AX8000, malfunctions may have different causes.
Error | Cause | ||||||||||||||||||
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Motor standstill, no starting | 1 | 2 |
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| 5 |
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Electric cylinder runs sluggishly | 1 |
| 3 |
| 5 | 6 |
| 8 |
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Start-up noises |
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| 3 |
| 5 | 6 |
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| 11 |
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| 19 |
Noises during operation | 1 |
| 3 |
| 5 | 6 |
| 8 |
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| 11 |
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| 19 |
High temperature at idling speed |
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| 4 |
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| 7 |
| 9 |
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| 19 |
High temperature under load | 1 |
| 3 |
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| 7 | 8 | 9 |
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Untrue running behavior |
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| 8 |
| 10 | 11 |
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| 19 |
Grinding noises |
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| 8 |
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| 12 |
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| 19 |
Brake fault |
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| 13 | 14 |
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Output stage fault |
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| 5 |
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| 15 | 16 |
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Feedback error |
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| 17 | 18 |
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Lack of braking effect |
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| 5 | 6 |
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Number | Cause | Solution |
|---|---|---|
1 | Servo drive not enabled | Set ENABLE signal and enable servo drive |
Overload of the electric cylinder | Check the load and if necessary reduce it, then restart and enable the servo drive. Set ENABLE signal | |
Mechanical blockage of the electric cylinder | Check mechanics and release blockage | |
Holding brake [+] not released | Check the control configuration of the holding brakes [+] and reconfigure if necessary | |
2 | Phase interruption in the power supply or reversed motor phases | Check servo drive and supply lines and replace any defective cables |
3 | Phase interruption after power supply | Check servo drive and supply lines and replace any defective cables |
Power cable or feedback line with defective shield | Check ground connection and shielding | |
4 | Short-circuit in the voltage supply cable for the holding brake [+] | Replace defective cable, measure and check cable after replacement |
Output voltage of the servo drive too low | Check the settings in the configuration and read out the electronic identification plate of the electric cylinder again | |
Defective holding brake [+] | Replace electric cylinder, then measure and check | |
5 | Short circuit or earth leakage in the motor cable | Replace defective motor cable, then measure and check |
6 | Power connector not fitted correctly | Check the connectors on the power connector and on the electric cylinder |
Interruption in the feedback line or motor cable | Check cables for wire break or crushing. Replace defective cables, then measure and check. |
Number | Cause | Solution |
|---|---|---|
7 | Required force too high. | Check design or configuration and adjust if necessary |
The spindle drive is clamped in the application. | Re-align electric cylinder or use compensating elements, see chapter Mechanical installation | |
8 | Lubrication is not sufficient | Check spindle for contamination and clean if necessary |
Check maintenance interval and relubricate if necessary | ||
Check length of working stroke and insert lubrication stroke if necessary | ||
9 | Heat dissipation system of the electric cylinder not functioning | Clean the surface of the electric cylinder and the servo drive as well as the heat sinks and exhaust air slots |
Check the mounting depth of the servo drives and the electric cylinder. | ||
10 | Shield of feedback line or motor cable defective or inadequate | Check ground connection and shielding |
11 | Servo drive gain is set too high. | Reconfigure the parameters of the servo drive and adjust them if necessary |
12 | Contamination or foreign bodies inside the electric cylinder | Send in electric cylinder. The repair is carried out by the vendor. |
Rotating parts chafing on the housing or electric cylinder components | Inspect chafing parts and readjust if necessary | |
Defective bearings; irreparable bearing damage | Send in electric cylinder. The repair is carried out by the vendor. |
Number | Cause | Solution |
|---|---|---|
13 | Short-circuit in the voltage supply cable for the holding brake [+] | Replace defective cable, then measure and check |
14 | Inadequate power supply of the holding brake [+] | Check the settings in the configuration and read out the electronic identification plate of the electric cylinder again |
15 | Short circuit or earth leakage in the electric cylinder | Replace defective electric cylinder, then measure and check |
16 | Insufficient power supply | Check the settings in the configuration and read out the electronic identification plate of the electric cylinder again |
17 | Interruption or crushing in the feedback line | Check cables for wire break or crushing. Replace defective cables, then measure and check. |
18 | Power connector of the electric cylinder incorrectly plugged in | Check correct seating of the connector for feedback signals and correct if necessary |
Loose fit of the feedback connector or no contact of the plug contacts with the power socket of the electric cylinder | Check the connector assembly. Contact Beckhoff Service if necessary | |
19 | Check spindle surface for damage and contamination | Contact Beckhoff Service, avoid impacts on the spindle and sudden loads during operation and assembly |