Manufacturing Technology: Unit V: Programming of CNC Machine Tools
fixed zero and floating zero positioning
Programming of CNC Machine Tools - Manufacturing Technology
Origin is considered as zero-point of the coordinate system.
FIXED ZERO AND FLOATING ZERO POSITIONING Origin is considered as zero-point of the coordinate system. The programmer needs to determine the position of the tool relative to the origin (i.e. zero point) of the coordinate system. There are two methods of specifying the zero point. 1. Fixed zero positioning 2. Floating zero positioning In a fixed zero positioning system, the origin is always located at the southwest corner i.e. lower left-hand corner of the table and all tool locations will be defined by positive X and Y coordinates. In a floating zero positioning system, the machine operator sets the zero point at any positions on the machine table. The part programmer decides the zero point to be located. It is also known as reference point. At the beginning of the job, the operator moves the tool under manual control to 'target point' on the table. The target point is at a convenient place on the workpiece or table for the operator to position the tool. Then, the operator presses a 'zero' buttons on the machine tool which tells the machine where the zero point is located for subsequent tool movement.
Manufacturing Technology: Unit V: Programming of CNC Machine Tools : Tag: : Programming of CNC Machine Tools - Manufacturing Technology - fixed zero and floating zero positioning
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Manufacturing Technology
ME3493 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation