Pengendali Tinggi Torch Plasma Cutting otomatis Pada Motor Penggerak Pnc-10

Abstract

In the cutting system by the method of plasma cutting, the distance of torch to cut material greatly affect the success of cutting material. This research aims to make the control of high torch motor drive, with controller input coming from the output voltage of plasma cutting machine of Hyperterm Powermax85 which has been reduced by 50 times the actual plasma output value of plasma machine during cutting process. The problem limitation of the manufacture of this tool is that it controls only one driving motor with one axis, up and down. In this study, the measurement of output voltage is done by using digital clamp meter and digital multimeter while to measure the distance of torch by using filler gauge and caliper. Then, the tool has been made, tested the functionality of the tool by adjusting the position of the workpiece by reviewing the kerf value changes. Based on the measurement of torch distance to material from 0mm to 8mm distance, the material condition is cut off and when the distance is 9mm, the material condition is not cut. Thus found the limit of the distance torch so that the material can be cut that is equal to 8mm. Then by taking large data of plasma output voltage which has been divide 50 times by voltage divider on plasma machine cutting to torch distance to cutting material, each of 0mm, 2mm, 4mm, 6mm, and 8mm, obtained data of average voltage of 2,620 V, 2,755 V, 2,995 V, 3,185 V, and 3,243 V. So based on the data, there is a relationship between the change of voltage (plasma output) to the distance (torch to cut material) that is: V = 0.083 (Distance) + constant. This equation shows that there is a relationship between the distance and the near linear voltage. While with cutting test of material set at different distance with fixed cutting machine position, this tool can cut the material without any part of the material that is not cut with the change of kerf value of 0.4mm from the initial value of 2.7 mm. Keywords: Plasma Cutting, Torch Distance, Output Voltage, Kerf