News Stories

Cranes Industry - Anticipating The Extra Mile

NDC Supporting the Crane Industry

(FEB 2016)


The OEM route for repairs tends to be an expensive one, and some OEm’s have agreements not to repair, and most users will recognise that. So how can you guarantee the quality and safety standards of an OEM or service agent, without compromising profitability? 


______________________________________________

 

To provide proportional or “stepless” control of the crane functions, most of the tower cranes manufactured in the last ten years have motor control systems which use inverter drives (variable speed drives). Often proprietary items these inverters are specifically programmed with personalised software by the manufacturer.

 

When faced with a faulty inverter there is an impulse to take the unit to the inverter manufacturer’s local service agent for repair. There is nothing wrong with that, if the service agent has access to the crane manufacturer’s settings. In fact, going to the manufacturer’s local service agent or even the OEM (Original Equipment Manufacturer) are the most common routes for the repair, because of the importance of these settings.

 

However, the OEM route tends to be an expensive one, and some OEm’s have agreements not to repair, and most users will recognise that. So how can you guarantee the quality and safety standards of an OEM or service agent, without compromising profitability?

 

NDC have been repairing and refurbishing Tower Crane Inverters for over 15 years and we have built a wealth of experience and knowledge in this field. We recognised at an early stage, the importance of Full application testing.

 

It’s possible and fairly easy for a repair company to simply test an inverter in its basic state. However, to consider aspects such as load testing, feedback verification, elements of the control inputs and safety relay outputs used in the Tower Crane, the software and parameter aspects – that’s where the line is drawn between a “basic” and “extended value” service.

 

 

That is why having the drive’s documentation is of great importance to us. Although we have an extensive application-related library for control diagrams, such as VACON (Comedil), RELIANCE (Wolff) and CONTROL TECHNIQUES (Jost Luffer) drives, we’re committed to extend our archive. We are interested in studying any spare inverters you might have, so we can prepare in advance for your future requirements.

 

We’ve come to realise over the years that the time invested in learning these requirements pays off in the end, when your lead time for a repair is reduced – exactly when you’ll need it the most. 

 

There’s no secret, only proven method

 

Our approach is simple, we function test the inverter, in line with our stated objective of ’Test, Diagnose, Repair, Test’ procedure. This approach remains the same whether the unit is a Hoist, Trolley or Slew inverter. We apply the control wiring as per application and add-in the correct feedback method where necessary. At this point we can apply load to the unit to the rated specification. We also verify the correct operation of any output or control signals relating to safety and mechanical brakes.

 

Rest assured

 

All inverters are refurbished to a very high standard and with the testing approach we take; you can be sure that the Inverter has been given a thorough overhaul and test. You also pride ourselves of working closely with our customers, and this investment in learning more about your spare drives corroborates that.

 

If you are curious on how this would work, give us as a call on 0161 865 6026 or get in touch with Duane Clarke on info@ndc-uk.com


Back to news

© 2012 - 2017 NDC - all rights reserved


Terms and Conditions