A simple laboratory test-rig for maize planter was developed for testing and calibrating the electronic seed metering mechanism. The test rig consists of two frame namely main frame and the second frame. The main frame consists of variable speed drive, electric motor and grease coated belt that are fitted with necessary provisions. The second frame consists of seed hopper, seed metering unit. The metering mechanism consists of a metering roll, seed delivery box with plunger plate, proximity sensor, solenoid valve to, 12 V DC motor and the seed outlet pipe. The electronic control unit was designed with (555 timer) to assist the solenoid to move in to and fro movement being accomplished by action of spring. The developed electronic metering mechanism was tested in the laboratory test rig for maize seed at various forward speeds of , 2 and km hr-1 . The seed to seed spacing and seed rate was calculated over grease coated belt and the results were statistically analyzed. | Development of electronic metering experimental test rig for maize
