Continuous measurement of production-relevant surface parameters
EMG SORM®
Ensure the highest product quality, avoid rejects and reduce complaints in the long term.
Measuring principle
EMG SORM® is the inline measuring system for recording roughness and waviness parameters on running strips. An important quality feature of uncoated and surface-finished strips are roughness characteristics.
LED-based confocal-chromatic measurement:
White light is dispersed by a chromatic lens to focus different wavelengths at distinct distances, where the reflected wavelength from a surface precisely indicates its position via spectrometer analysis.
Technical details
- Measurement parameters:
- Ra from 0,3 µm
- RPc up to 200 cm^-1
- Wsa from 0,1 µm
- Measuring accuracy*:
- Ra/Wsa: +/- 15 % compared to tactile measurement (for 85 % of all values)
- RPc: +/- 20 % compared to tactile measurement (for 80 % of all values)
- Light source: LED (no laser required)
- Working distance: 25 mm
- Working distance tolerance without focussing unit: 1.5 mm
- Necessary space in plant: approx. 500 mm in production direction
- Determination of roughness parameters: acc. to DIN EN 10049 and SEP 1941
- Measuring range (Strip thickness): 2.5 mm (beyond that focus unit recommended)
* based on experience gained in online testing
Customer benefits
- Ensuring product quality
- Control and optimisation of the skin pass and/or rolling process
- Cost reduction through optimisation of the roll service life
- Reduction of complaints due to early detection of deviations from the required roughness range
- Reduction of scrap during a subsequent check on the rewinding line
- Stable forming process due to constant roughness parameters
- Excellent painting results due to homogeneous surface roughness
- Savings compared to manual stylus measurement
Experience EMG SORM® in Operation
Application insights
Discontinued components
Of course, we also offer you qualitative replacement solutions for discontinued components. You can find a list of our discontinued components here.
Further EMG solutions
Perfect for these industries
EMG SORM® measures the metal strip online and calculates the surface profile, from which the roughness parameters Ra and RPc as well as the waviness Wsa are then determined. Our solution thus enables the seamless measurement of production-relevant surface parameters.
Franziska KneiselProduct Manager