Converted the system to an open loop system.The power supply required a refrence voltage of 0-2.67V to give an output of 0-30V. Used a Voltage divider network that gave 2.67V for a 5 V input and fed its output to a voltage buffer (om-amp).{on giving directly the volatge goes to zero because of very high source resistance}.The open loop system seemed to be working well with a small error.Adjusted the values of the resistance in the voltage divider network to reduce error.
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