What Does the SP9033 Alarm Mean?
The official definition of the SP9033 is DC Bus Charge Failure. The bus can be imagined as a drive in the "energy pool”, power on the capacitor to rely on the first to charge the power to ensure that the subsequent servo, spindle stable operation. If the voltage is not charged up in the specified time, the system will directly report SP9033, the machine is stuck in place.
The scene performance is probably:
* Drive can not get up at all;
* Spindle or servo can not start;
* May also be accompanied by other alarm codes, together with where you have internal problems.
More seriously, if not dealt with in time, SP9033 may be hidden behind the capacitor aging, power module abnormalities, or even the risk of damage to the entire drive module.
Why Is SP9033 Reported?
Combining the manufacturer's manual and our experience in the field, these are the most common conditions:
* Power contactor failure: The contactor is not suctioned properly, or the contacts are blackened and eroded, and electricity cannot be sent in.
* DC bus capacitor aging: The capacitor used for a long time capacity decline, as a result of charging can not be charged. Appearance of common bulging, leakage.
* Pre-charging resistor or circuit damage: The role of the pre-charging resistor is to limit the inrush current at power on, once open circuit, the charging process is broken.
* IPM (Intelligent Power Module) Abnormal: If overcurrent or overload is detected, IPM will cut off the protection immediately and the system reports an error.
* Driver or power module failure itself: Short-circuiting or damage to internal components can also make the charging session completely stuck.
Some of these problems can be seen at a glance, such as capacitor bulging; but some must be localized on a professional
Fanuc test bench.
Relationship Between SP9033 and SV0442
Many friends find that SP9033 tends to appear together with SV0442. Actually it is a link problem:
* SP9033 Indicates that the bus voltage is not properly charged.
* SV0442 More specifically, points to a problem with the bus auxiliary charging circuit.
Both jump out at the same time, the probability is that the problem is not a bad part, but the entire DC bus charging circuit is abnormal. Commonly, capacitors, resistors, and related circuits are aging as a whole.
Our Usual Troubleshooting Method
When dealing with SP9033 faults, we are used to this step-by-step approach:
1. First power off and discharge: Safety is the first priority. You have to wait for the capacitor to be completely discharged before you can do anything.
2. Look at the contactor: When the power on the contactor has a normal suction? Are the contacts ablated? If there is a problem, change it.
3. Measure the bus voltage: Use a multimeter to see if the voltage is up at the moment of power-up. If there is no movement, the basic lock capacitor or pre-charge circuit.
4. Check capacitors and resistors: Capacitors have no drum, leakage? Is the resistance normal?
5. Measure IPM and module: IPM is especially easy to break under high temperature or over-current environment.
6. On the test bench to verify: If there are conditions, the drive connected to the Fanuc special test bench on the run once, can simulate the real machine environment, which is more reliable than simply measuring capacitance resistance.
How to Prevent SP9033?
Repair is the symptom, prevention is the root cause. We generally advise customers to:
* Check the health of bus voltage and capacitance regularly.
* Doing routine checks with a test bench can detect many potential problems in advance.
* When the life of capacitors expires (generally 5~7 years), do not wait until they fail to be replaced, it is safer to replace them in advance.
* Contactor, pre-charge resistor regular inspection, do not wait for burned out before thinking about it.
* Keep the cabinet dry and clean to minimize dust and moisture.
Why Choose Songwei?
Songwei specializes in CNC automation parts and services, especially Fanuc systems. The reasons why customers choose us are probably:
* Wide brand coverage: Fanuc, Mitsubishi, Siemens, Okuma, Heidenhain all do.
* One-stop service: New parts, used parts sales, maintenance and testing of the whole process.
*
Professional test bench: Our self-built Fanuc test bench, you can realistically restore the machine tool operation, diagnosis is more accurate.
* Service customers all over the world: Europe, America, Asia have partners.
* Strict quality control and warranty: Every part that leaves the factory undergoes a complete test and is guaranteed after sales.
For our customers, Songwei is not only selling parts, but also a long-term partner to help you reduce downtime and extend the life of your equipment.
Summary
Fanuc Alarm SP9033 is a typical DC bus charging abnormal alarm. Common causes include damaged contactors, deteriorated capacitors, pre-charge circuit problems, faulty IPM modules, and internal drive damage. Often times it will appear in conjunction with SV0442 to indicate a problem with the entire charging path.
If your factory also encounters SP9033 or SV0442, please feel free to contact
Songwei. We can provide testing, repair and parts replacement to help you resume production as soon as possible and keep your equipment running reliably for a long time.
