SEMI-AUTOMATIC TAPPING MACHINE CONTROL USING MICROCONTROLLER
Keywords:Semi-automatic tapping machine, microcontroller, infrared distance sensor, ultrasonic distance sensor
This paper presents a semi-automatic tapping machine development for the manufacturing industry. There are some parts required for screw clamping bolt. The subsidiaries need to order tapping machine importing from foreign country which is expensive. This reason necessary to develop the tapping machine control using microcontroller to facilitate working. In this case, the auxiliary instrument is added on the pedestal drill. Pneumatic system is used to control the displacement distance between the work piece and the drill bits or a thread tap using the distance data from infrared sensor. Microcontroller with infrared sensor to control the drill bits in the range prevent a collision with the work piece base. It setting up a spiral range in work piece using the signals from infrared sensor. After completing work, the drill bits remove from a work piece automatically. Experimental results have shown that the spiral range in the work pieces are accurate for satisfactory to compare with the foreign tapping machine. The accuracy rate of the developed tapping machine in this research is about 4% and 5% for M4 and M9 thread tap. Furthermore, the researchers test the accuracy of infrared distance sensors compare with the ultrasonic distance sensors. The accuracy rate of infrared distance sensors are higher than the ultrasonic distance sensors.
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