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When the CUTCOM parameter is ON, specifying only the LEAD_RADIUS parameter, which defines the circular lead motion, may cause undesirable tool movement. Add a linear lead motion by specifying TANGENTIAL_LEAD_STEP or NORMAL_LEAD_STEP parameter along with the LEAD_RADIUS parameter to achieve the correct output.
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For interrupted cuts in Thread Milling, CUTCOM is turned off at the location set by CUTCOM_LOC_EXIT during the exit move from the cut and the CL output shifts back to the centre of the tool. Similarly, CUTCOM is set to ON at the location set by CUTCOM_LOC_APPR during the entry move to the next cut and the CL output shifts back to the edge of the tool. This sequence is repeated until the thread cut is complete.
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