Siemens SINUMERIK 840D sl Operating Manual page 388

Programming technological functions (cycles)
8.3 Contour milling
Contour transition elements
As a transition between two contour elements, you can choose a radius or a chamfer. The
transition element is always attached at the end of a contour element. The contour transition
element is selected in the parameter screen of the respective contour element.
You can use a contour transition element whenever there is an intersection between two
successive elements which can be calculated from the input values. Otherwise you must use
the straight/circle contour elements.
The contour end is an exception. Although there is no intersection to another element, you
can still define a radius or a chamfer as a transition element for the blank.
Additional functions
The following additional functions are available for programming a contour:
● Tangent to preceding element
● Dialog box selection
● Close contour
Procedure for entering contour elements
388
You can program the transition to the preceding element as tangent.
If two different possible contours result from the parameters entered thus far, one of the
options must be selected.
From the actual position, you can close the contour with a straight line to the starting
point.
1. The part program or the machining schedule is opened. Position the
cursor at the desired entry position.
2. Contour input using contour support:
2.1 Press the "Contour milling", "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.
2.3 The input screen to enter the contour opens, in which you initially enter
a starting point for the contour. This is marked in the lefthand navigation
bar using the "+" symbol.
Press the "Accept" softkey.
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Milling