Programming technological functions (cycles)8.5 Contour turning - only for G code programsMillingOperating Manual, 03/2010, 6FC5398-7CP20-1BA0 383Additional functionsThe following additional functions are available for programming a contour:● Tangent to preceding elementYou can program the transition to the preceding element as tangent.● Selecting a dialog boxIf two different possible contours result from the parameters entered thus far, one of theoptions must be selected.● Close contourFrom the actual position, you can close the contour with a straight line to the starting point.Producing exact contour transitionsThe axis moves in the continuous path mode (G64). As a result, contour transitions such ascorners, chamfers or radii may not be machined precisely.If you wish to avoid this, there are two different options when programming. Use theadditional programs or program the special feedrate for the transition element.● Additional commandFor a contour, first program the vertical straight line and then enter "G9" (non-modal exactstop) for the additional command parameter. Then program the horizontal straight line. Thecorner will be machined exactly, since the feedrate at the end of the vertical straight line isbriefly zero.● Feedrate, transition elementIf you have chosen a chamfer or a radius as the transition element, enter a reduced feedratein the "FRC" parameter. The slower machining rate means that the transition element ismachined more accurately.Procedure for entering contour elements1. The part program is opened. Position the cursor at the required inputposition, this is generally at the physical end of the program after M02or M30.2. Contour input using contour support:2.1 Press the "Contour turning", "Contour" and "New contour" softkeys.2.2 In the opened input window, enter a name for the contour, e.g.contour_1.Press the "Accept" softkey.
