Tangential Control - Siemens SINUMERIK 840D sl Function Manual

10.5.3

Tangential control

Function
The "tangential control" function aligns the rotary axis used for positioning the punching/
nibbling tool so that it is tangential to the programmed path. In connection with tangential
control, this axis is called the tangential axis. The linear axes of the machining plane are the
leading axes of the tangential coupling. The tangential axis is the following axis that is aligned
to the path tangent of the lead axes. An additive offset angle for the tangent angle can also be
programmed for the tangential axis.
If the punching/nibbling tool (die and die plate) is moved via two separate rotary axes, the
second rotary axes can be coupled to the tangential axis via "coupled motion".
Note
Switch-on sequence
In the NC program, the tangential control must first be defined and then the coupled motion
must be activated.
References
A detailed description of the tangential control can be found in:
Function Manual, Special Functions, Chapter: "T3: Tangential control"
Example: Linear interpolation
Assumptions
● The punching/nibbling tool is subdivided into bottom and top tool
● The bottom tool and top tool are moved by different rotary axes (C/C1).
● The linear axes X and Y are the leading axes (machining plane G17)
Program code
N2 TANG (C, X, Y, 1, "B")
N5 G0 X10 Y5
N8 TRAILON (C1, C, 1)
N10 Y10 C225 PON F60
N15 X20 Y20 C45
N20 X50 Y20 C90 SPOF
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Comment
; definition tangential control
; leading axes: X, Y
; following axis: C
; coupling factor: 1
; basic coordinate system
; starting position
; coupled motion ON
; C/C1 axis → 225°
; nibbling initiation ON, → stroke
; C/C1 axis → 45° → stroke
; C/C1 axis → 90°
; stroke initiation OFF
N4: Own channel - only 840D sl
10.5 Rotatable tool
641