To Specify Entry and Exit Motions
1. When defining a Profile milling, Volume milling, or Trajectory milling NC sequence, click 
on the Parameters tab. The Edit Parameters dialog box opens.
on the Parameters tab. The Edit Parameters dialog box opens.2. Select Entry/Exit Motions from the Category list. A list of entry and exit parameters is displayed.
3. Select one of the following values for the CUT_ENTRY_EXT parameter for the entry motion:
◦ NONE—No entry move.
◦ LINE_TANGENT—The tool enters in a line tangent to the cut. The length of the line is defined by the TANGENT_LEAD_STEP parameter.
◦ NORMAL—The entry motion is a straight line normal to the cut motion. The length of the line is defined by the NORMAL_LEAD_STEP parameter.
◦ HELIX—The tool enters along a helix. The geometry of the helix is defined by the HELICAL_DIAMETER and RAMP_ANGLE parameters. You must specify a value for the APPROACH_DISTANCE parameter for the tool to take a helical entry path.
◦ LEAD_IN—The tool leads into the cut. The move is defined by the TANGENT_LEAD_STEP, NORMAL_LEAD_STEP, LEAD_RADIUS, and ENTRY_ANGLE parameters.
◦ ALONG_AXIS—The entry motion is along the selected axis for a plunge motion.
4. Select one of the following values for the CUT_EXIT_EXT parameter for the exit motion:
◦ NONE—No exit move.
◦ LINE_TANGENT—The tool exits in a line tangent to the cut. The length of the line is defined by the TANGENT_LEAD_STEP parameter.
◦ NORMAL—The exit motion is a straight line normal to the cut motion. The length of the line is defined by the NORMAL_LEAD_STEP parameter.
◦ LEAD_OUT—The tool leads out of the cut. The move is defined by the TANGENT_LEAD_STEP, NORMAL_LEAD_STEP, LEAD_RADIUS, and EXIT_ANGLE parameters.
◦ ALONG_AXIS—The exit motion is along the selected axis for a retract motion.
5. Click OK to save the changes and close the dialog box.