Surface roughness is a key factor determining the quality as well as wear-resistance of rolls during the process of polishing, coating, plating, and processing steel sheet in steelmaking industry, which shall be subject to quality control. With the consumer's increasingly interest in surface roughness, on-line surface roughness control is very pressing in order to meet customer's needs.
The gauge is an on-line measurement system for measuring surface (Ra) and spatial frequency (PPI) by way of non-contact optical reflection method using laser, during production process of rolled steel sheet, enabling to predict when the roll is to be replaced through monitoring data measured.
- Surface reflection method
- Optical Sensor Head
- Linear Motion Actuator
- Sensor Position Controller(local)
- Electrical Controller(electrical room or operation room)
- Can be modified upon customer request
- Non-Contact OnLine Measurement
- Simultaneous measurement of spatial frequency (PPI)
POSCO(Pohang) No.1CRM 1CAL, 2CAL
- Surface roughness measurement in cold rolling mill (CAL)
- Prediction of when to replace rolls (SPM) and modeling in rolling mill
- Surface roughness measurement in plated steel sheet mill (CGL, EGL)
- Surface roughness measurement in non-ferrous (Aluminum, etc.) and ceramic processing.
System Performance | Measurement Range | Ra : 0.1num to 2.0um, PPI : 100 to 600 peak⁄inch |
Target Temperature | Maximum 50¡É | |
Update Time | 50ms to 2seconds(user selectable) | |
Response Time | <50ms | |
Reproducibility | <±0.1§ | |
Accuracy | <±0.1§ | |
Utility | Pure Air | 5kg⁄§², Dry, Class 3, 2-25A pipe lines |
Water | Non used | |
Environment | Ambient Temperature | 0¡É to 40¡É |
Relative Humidity | Non-condensing environment for sensors | |
Signal Ground | Maximum 10¥Ø | |
Frame Ground | Maximum 100¥Ø | |
Power | 220VAC, 60Hz, 1Phase |
TCP/IP(standard) | Surface information(Ra, PPI), Configuration |
Digital Input | Line status(run, stop, fault), Coil change, Measure start⁄stop |
Digital Output | Alarm for tolerance of Ra |
Analog Input | 4 to 20mA or DC 0V to 10V, Line speed |
Analog Output | 4 to 20mA, DC 0V to 10V output proportional Ra and scanning position |
Type | Heavy duty aluminum extrusion |
Laser Source | He-Ne Laser(Ra), Solid state diode Laser(PPI) |
Laser Safety Class | Class ¥²(b) |
Laser Visible, Color | Ra : Non visible(IR), PPI : Visible(Red) |
Feature | Nitrogen(N2) Gas |
Relative Humidity | Non-condensing environment |
Ambient Temperature Range | 0¡É to 40¡É |
Power | 220VAC, 60Hz, 1Phase |
Type | Stand, Stainless steel extrusion |
Dimension(mm) | 600(W) × 400(D) × 1,000(H) |
Front Functional Switch and Lamp | Power, Local⁄Remote, Position control(forward,reverse), E-Stop |
Required Cooling | Pure Air, Dry |
Cooling Device | Cabinet cooler included |
Type | Belt type(hidden) |
Motor | AC Servo Motor |
Stroke (standard) | 2,000mm |
Type | 19″ Standard Rack Mount |
Dimension(mm) | 800(W) ¡¿ 800(D) ¡¿ 2,000(H) |
Peripheral Interface | D⁄I, D⁄O, A⁄I, A⁄O, RS232 and TCP⁄IP(upon customer request) |
Ambient Temperature Range | -5¡É to 45¡É |
Relative Humidity | Maximum 80%RH |
Power | 220VAC, 60Hz, 1Phase |