Coil Translation Measurement System
problem
The problem of clipped curls can often be traced back to poor positional control of sheets on the coil cutting line. Sencon’s SC1270 CTMS (Coil Translation Measurement System) continuously monitors and measures the coil’s edge position as it goes through the cutting line with a high degree of accuracy. Any lateral drift of the coil edge position beyond preset limits causes an alarm.
- benefits
- Prevent clipped curls by measuring coil translation on the cutting line
- Instant warning about sideways movement of the coil beyond tight preset limits
- More accurate calibration and adjustment of the guides as the gauging rolls wear down
- Identify unacceptable variations in coil width during a run
- Increase plant efficiency
- additional benefits
- Improve set up of the guides when a new coil is loaded
- Achieve more accurate re-calibrating of the coil guides as the gauging rolls wear down
- Identify unacceptable variations in coil width—after a weld, for example—during a batch run
When cutting scrolled sheets, any sideways movement—or translation—of the coil on the cutting line becomes critical, because this movement will misplace the scrolled edges on the sheets. In order to reduce the scrap levels of the skeleton, very little spare metal is left around the intended end position. Consequently only a very small misalignment of the scroll edge on the cutting line will eventually result in clipped curls.
The system uses a self-learning, non-contact optical measurement technique which has no wear parts and is unaffected by vertical vibration of the coil as it travels between the guide wheels. Coil translation measurement accuracy is ± 0.08mm (± 3 thou), with a capability of operating at 9000 sheets per hour.