 
Constant Current Welding Controller has Buzzer alarm and beacon light installed over it which gives alarm and flashing light if the spot is above and below of set permissible current limit.
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In Projection welding, if the nuts are welded with the Constant Current Welding controller, the controller alarms faulty nut weld at the time of welding itself and thus saves rejection of entire lot.
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Constant Current Welding is a very important feature for Seam welding applications as it mainly demands leak proof joints which requires constant current while welding.
In seam welding application redressing of wheel can be alarmed : during seam welding, the dressed contact area of the wheel continuously go on increasing due to wheel wear. This increase leads to lower current densities and subsequent leakage. This can be avoided by monitor of the constant current welding controller. Monitor gives alarm as soon as the current falls below the specific limit due to wears. Lot of rework can be avoided by using this method.
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Different welding schedules can be called if the component requires welding of different thickness on the same job. In case of two schedule calls, this can be done simply by adding a foot switch. Two foot switches can call two different welding schedules.
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Validates Cylinder Pressure
Pressure is important parameter in the welding process. The input of system pressure can be feed into welding controller by pressure sensor, in this case the machine will start the cycle but will not complete the cycle till the cylinder pressure is achieved. This facility is useful while making high quality welds on studs, shock absorbers.
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Inbuilt Spot Count Monitor
Number of spot present on a job can be monitored by inbuilt facility of spot monitor. We need to program no. of spots required by design on the job. A sensor (opto) needs to install to sense the presence of job. On removing component before completion of spots programmed, the constant current welding controller gives out error.
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Weld Component Presence Sensing
Presence of the component to be welded can be sensed “(by additional sensor) “. The controller will not make actual weld if the job is absent.
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