PLC testing

If possible, we test all the connections of the repaired part.

These include:

• Analogue inputs and outputs
• Temperature inputs
• The power supply
• The bus system
• Communication connections

With regard to CPUs, we carry out the following tests:

• Memory test by loading a program
• Memory test by disconnecting the power supply
• Testing input and output modules / communication modules that are connected to the processor
• And other tests

CNC testing

• Testing communication connections
• Testing memory parameters
• Testing I/O modules, if installed
• Testing monitors in combination with the control unit
• Testing safety boards
• Endurance tests
• Testing extra encoder input connections using an encoder simulator

• Repairs for fixed prices, which you know in advance
• Preventive replacement of critical components included in the repair
• Repairs within 5–6 weeks
• Thorough load testing
• Free collection of your faulty part

What is more:

• We have extensive experience with repairs.
• We cooperate with world's leading repair centres.
• Our quality management system is certified to ISO 9001:2015.

In addition, we can take you on a guided tour of a repair centre so that you can see for yourself how parts are repaired.

Testing repaired modules

When repairing SIMODRIVE 611 modules, we do not replace only faulty components but also critical components which are susceptible to breakdown. Repaired modules are subjected to a full load test (up to 110 kW) for 3–7 days nonstop. This shows the stability and quality of the modules. For every test, we generate a report documenting the testing process, which we can send to you.

Urgent repairs to SIMODRIVE modules

Although we provide urgent repairs to SIMODRIVE modules within 3–5 days, for modules to be tested thoroughly, we recommend a standard repair of 4 weeks. It is sometimes the case that, while being tested, the module reports a fault after 3 days. It is thus checked again, repaired and continuously tested until it passes the test.

SIMODRIVE 611 in stock in Liberec

We stock the most commonly used control and power modules. Power modules are tested for several days. For these modules, we can also provide reports documenting the load testing that the modules have undergone. We offer both new and used modules. Used modules have been repaired and tested by the UNIS Group repair centre in the Netherlands.

• Repairs for fixed prices, which you know in advance
• Preventive replacement of critical components included in the repair
• Repairs within 5–6 weeks
• Thorough load testing
• Free collection of your faulty part

What is more:

• We have extensive experience with repairs.
• We cooperate with world's leading repair centres.
• Our quality management system is certified to ISO 9001:2015.

In addition, we can take you on a guided tour of a repair centre so that you can see for yourself how parts are repaired.

The testing of repaired panels includes:

• Testing buttons and the touch screen
• Testing the monitor
• Testing communication connections
• Testing I/O modules, if installed
• Controls calibration

• Repairs for fixed prices, which you know in advance
• Preventive replacement of critical components included in the repair
• Repairs within 5–6 weeks
• Thorough load testing
• Free collection of your faulty part

What is more:

• We have extensive experience with repairs.
• We cooperate with world's leading repair centres.
• Our quality management system is certified to ISO 9001:2015.

In addition, we can take you on a guided tour of a repair centre so that you can see for yourself how parts are repaired.

UNIS Group has been repairing frequency drives and soft starters for a long time. It has extensive experience with various brands, types and series, from the most obsolete to the latest.

The repair centre boasts testing systems for testing several frequency drives at a time as well as individually. It also features a sophisticated testing system that allows for testing under continuous high power of up to 110 kW. Repaired frequency drives and soft starters come with a warranty of up to two years.

The testing of frequency drives and soft starters includes:

• Testing communication connections
• Testing operator panels, if installed
• Testing digital and analogue control inputs
• Simodrive 611 modules undergo a three-day endurance test under continuous high power of up to 110 kW. This test shows if repaired modules are fully functional.

• Repairs for fixed prices, which you know in advance
• Preventive replacement of critical components included in the repair
• Repairs within 5–6 weeks
• Thorough load testing
• Free collection of your faulty part

What is more:

• We have extensive experience with repairs.
• We cooperate with world's leading repair centres.
• Our quality management system is certified to ISO 9001:2015.

In addition, we can take you on a guided tour of a repair centre so that you can see for yourself how parts are repaired.

Servo motor repairs is the only type of repair where we cannot tell you the price for the repair in advance. In most cases, we only have to clean the motor and replace bearings. Sometimes we need to replace the encoder or the brake or refurbish the whole shaft. In short, we have to disassemble the motor. Only then – when we have discovered what exactly needs to be repaired – can we send you our price quote.

After the repair, motors undergo thorough testing. We have over 100 testing systems that allow for motors to be tested under full load.

How are servo motors repaired?

• Your servo motor is first cleaned in a special way. This ensures that grease and grime are removed from it.
• When the motor has been dried, it is handed over to our technical personnel. They diagnose faults and replace faulty components.
• If it is the encoder that does not work, it is either repaired or replaced.
• The repaired motor is then thoroughly tested to maximum load, if possible.
• Every repair comes with a report documenting the work and the testing carried out during the repair. If requested, we can send it to you.
• If the motor passes all tests, it is carefully packed and ready to be shipped.

All repaired servo motors come with a six-month warranty.

Servo motor repairs include:

• Incremental and absolute encoder repair and testing
• Encoder adjustment
• Inspection and repair of commutator sensors
• Commutator sensors adjustment
• Encoder memory reset
• Magnetic field inspection and testing
• Brake inspection
• Braking torque inspection
• Inspection and replacement of bearings
• Shaft inspection
• Inspection and replacement of press rings
• Refurbishment of mechanical parts
• Cleaning of all servo motor components
• Insulation check
• Inspection of connectors
• Inspection of the winding
• Stator rewinding

• Preventive replacement of critical components included in the repair

• Repairs within 5–6 weeks

• Thorough load testing

• Free collection of your faulty part

What is more:

• We have extensive experience with repairs.

• We cooperate with world's leading repair centres.

• Our quality management system is certified to ISO 9001:2015.