MEASUREMENT OF SPHERE INTERPOLATION IN XY FIELD AT CNC MACHINE THROUGH MACHINING TEST AND DOUBLE BALL BAR

• Main Author: GANJAR TABAH , GAGAN
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27436
• Institution: Institut Teknologi Bandung

<p align="justify">Computer Numerical Control (CNC) HARTFORD has three axes X, Y, and Z that can move simultaneously. The creation of circular trajectory needs two axes that move simultaneously in XY, XZ, and YZ planes. In this research, the measurement of circular interpolation error is done in XY plane. Coordination between two axes is needed for creating trajectory in that plane. If those two axes are not well coordinated, error will be generated in the trajectory. Meanwhile, there are several methods for measuring those axes’ synchronization. Two of them are double ball bar (DBB) and machining test method. Prior to the existence of double ball bar, the measurement of interpolation error is very difficult. Because, the error measured with machining test contain not only interpolation error, but also machining process error (machining stiffness, tool sharpness, chatter, etc.). In this research, descriptive analysis method are used. The report is formulated from double ball bar measurement data and machining test result. Before the test is executed, the machining parameter is planned. The result of machining test is then analyzed and compared to double ball bar measurement result. From this research, the following conclusion can be deduced. The tool trajectories measured using double ball bar and machining test have the same shape. Roundness measurement through machining test after being reduced by tool deflection is still higher than the measurement using a double ball bar and the variance is 5.19 um.<p align="justify">