EMG hotCAM -
Optical position measurement on hot strip

EMG hotCAM -
Optical position measurement on hot strip

The hot rolling process is typically a combination of a reversing stand (roughing stand) and a finishing line with several rolling stands. Maintaining a defined position of the strip between the rolling stands is essential for process safety in a hot rolling mill. Continuous measurement of the strip position with our EMG hotCAM solution enables you to optimise the adjustment of the rolling force and gap. The measuring accuracy of our system is +/- 1.5 mm.  

In reversing stands this leads to a reduction of the camber of the strip and thus prevents collisions of the strip with the mechanical strip guiding rail. Continuous control of the centre position in a finishing line also reduces strip guiding cobbles, which could otherwise result in serious damage and interruptions to the production process.   

Customer benefits and unique selling propositions

Improved process safety

Easy to integrate system 

Little maintenance required on the camera 

Targeted error analysis through extended process data (position value between the frameworks) 

Evaluation of individual images (PDF report of each strip with strip end images) 

Better manual control by the operator (direct feedback) 

Closed control loop with SMS X-Roll® 

When using the EMG hotCAM centre position, a closed control loop can be realised in a finishing line. We use SMS X-Roll® - a product of the SMS Group that demonstrably stabilises the rolling process. With this combination of position measurement on the hot strip EMG hotCAM and the closed control loop, we offer comprehensive process optimisation in the hot strip area.

Advantages EMG hotCAM & SMS X-Roll®:

Reduction of sheared strip ends 

Fewer unscheduled roller changes necessary

Improving process stability 

Stabilisation of the ligament position

Improvement of the strip geometry 

Reduced operator intervention on the system TOM (Tail Out Monitor) 

Improved operator support  


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"Our strength lies in the fact that we define and solve tasks together with the customer. The intensive exchange brings positive effects for the successful implementation of joint projects. For example, together with our customers we were able to develop a control algorithm based on the measurement results of EMG hotCAM, which enables automated control of the rolling mill."

Guido Eichert, Product Manager

More solutions

This also applies to the hot area: Special conditions require special solutions. Learn more about the possibilities and advantages of the EMG solution EMG iSCAN®: Slab dimension measurement, positioning and tracking to optimise your hot rolling processes. 

All EMG systems are based on the same hardware and software structure. Benefit from the use of our broad solution portfolio and reduce your TCO (Total Cost of Ownership)!  


Precise, non-contact measurement of slab geometry with EMG iSCAN® is realised with a customised array of laser-based sensors. Even under great heat, our sensors keep a cool head.   


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