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Programming technological functions (cycles)

8.3 Contour milling

Milling

338 Operating Manual, 03/2010, 6FC5398-7CP20-1BA0

Procedure

1. The subprogram to be edited has been created and you are in the

editor.

2. Press the "Contour milling" softkey.

3. Press the "Contour" and "Contour call" softkeys.

The "Contour Call" input window opens.

4. Assign parameters to the contour selection.

Parameter Description Unit

Contour selection

 Contour name

 Labels

 Subprogram

 Labels in the subprogram

Contour name CON: Contour name

Labels

 LAB1: Label 1

 LAB2: Label 2

Subprogram PRG: Subprogram

Labels in the

subprogram

 PRG: Subprogram

 LAB1: Label 1

 LAB2: Label 2

8.3.7 Path milling (CYCLE72)

Function

You can mill along any programmed contour with the "Path milling" cycle. The function

operates with cutter radius compensation. Machining can be performed in either direction,

i.e. in the direction of the programmed contour or in the opposite direction.

It is not imperative that the contour is closed. You can perform any of the following

operations:

● Inside or outside machining (on left or right of the contour).

● Machining along center-point path.

For machining in the opposite direction, contours must not consist of more than 170 contour

elements (incl. chamfers/radii). Special aspects (except for feed values) of free G code input

are ignored during path milling in the opposite direction to the contour.

Siemens SINUMERIK 840D Operating Manual

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