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27.09.2018

The time is ripe: retrofit from BMI to SMI now

Find out, why you should convert now!

In recent years, development has progressed continuously not only for EMG control systems, but also for strip center sensors. The tried and tested BMI inductive strip center sensor was replaced in 2010 by the new SMI sensor generation (Strip Measurement Inductive). 

In addition to the well-known performance features of inductive technology such as  maintenance-free operation and robustness, the SMI sensor generation used today is characterized by the modular sensor design and the improved symmetry properties of the SMI sensor family. This has resulted in improved center measurement accuracy and a wide range of variation options to meet your individual requirements. Only the SMI measuring frames from EMG offer a complete linearization of the measurement values over the entire bandwidth. This leads to better and more homogeneous control characteristics over the various bandwidths and in the case of a severe lateral strip run.

Modularity means the availability of five transmitter spool sizes in order to optimally cover both narrow and wide strips. Specifically, these are the 150 mm, 300 mm, 500 mm, 750 mm and 900 mm spool size classes, which can be used to cover strip width changes from 300 mm to 1800 mm. The figure shows the new SMI generation compatible for different strip widths and passage height.

The SMI sensor family is mechanically compatible with the outdated BMI sensors because the mounting plates have the same hole pattern. Communication with the EMG digital controller iCONⓇ XE is via CANbus and the sensor electronics are supplied with power via 24 V DC. The 24 V DC supply can be retrofitted in the control cabinet with little effort. For this purpose, there is an EMG conversion package available with all necessary components. In addition, the old SPC16 control amplifier can still be used for all conversions from BMI2-CP measuring frames to SMI measuring frames.

And why should you convert now?

The two main arguments are future security and maintenance costs. You probably don't have to say much about the first point, as it is a basic argument for updating electronic and sensor components. The typical cycles of a sensor generation are between 15 and 20 years and in this respect BMI technology is simply no longer up to date today. Closely related to this is the second point are maintenance costs. As a result of the significantly lower production volume of BMI sensors, which can of course continue to be supplied as spare parts, procurement costs are gradually rising significantly. The same applies to associated service calls. At some point, replacement will become more expensive than new acquisition. You can prevent this situation today by successively converting your sensors to SMI. The effort is modest, and our service technicians and sales representatives will be happy to inform you about your specific system situation.

A further advantage is the use of the motherboard of the SMI evaluation electronics for all inductive EMG sensors and thus a standardization of spare parts.

Find out more!

Would you like to know more about the SMI sensor family or general strip guiding system from EMG? Do you have your own requirements and plans for conversions or new systems? Then please do not hesitate to contact our sales organization or our responsible product manager Mr. Martin Wied (martin.wied@emg-automation.com). We will be happy to help you at any time. 

Here you can also download the overview brochure for inductive strip position detection with an overview of design forms, technical details and application examples: Brochure Strip position measurement inductive!

Further information can be found on our website.