mis-spray detection system
Sencon’s SC7000+ Mis-Spray Detector operates right at each spray machine head, giving immediate warning of spray system problems and preventing bad cans from mixing with good ones. If a mis-spray problem is detected, the offending spray machine is stopped, but the remainder continue with production, minimizing interruption to the production line output.
- benefits
- Reduced spoilage
- Bad cans are stopped at the machine
- Increased efficiency
- No sorting or line shut-downs
- Improved product quality and customer satisfaction
- Compact and self-contained
- Simple installation
- Self calibrating, adjustment free
- Selectable sensitivity level
- Automatic compensation for spray build-up
Installation
The Sencon SC7000+ Mis-Spray Detection System sensor is fitted to the discharge trackwork of the spray machine. Where this is gravity drop, an optional can stop is required, which is fitted 300 mm (12 inches) downstream.
Operation
A series of infrared light absorption readings are taken as each can passes. These are stored by the system’s internal micro-computer and compared with readings taken from the average ‘good can’. Since more light is absorbed by the lacquered surface than by exposed metal, any significant area of the can that is not lacquered is detected as a relative increase in reflected light. The offending can is thus identified as mis-sprayed and is held by the can stop while an output signal from the detector halts the problem spray machine.
Self Calibrating, Adjustment Free
The detector constantly updates its stored value that represents the ‘good can’ reading. It continually self-calibrates and compensates for the inevitable accumulation of lacquer and dirt on the detector. The system is therefore adjustment-free. The trip level only requires manual setting at the time of initial installation.
Selectable Sensitivity
The SC7000+ is supplied ‘ready to go’. However, it is possible to increase the sensitivity. While this may allow more partial mis-sprays to be detected, it may also create false stops. Customers can try different sensitivity settings by using a ‘hidden’ programming technique, which is only active when power is first applied. This helps to prevent unauthorized adjustment.