Siemens sinumerik 840d Programming Manual page 303

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A rotary axis (= following axis) follows the

programmed path of two leading axes. The following

axis is located at a defined offset angle to the path

Applications

Tangential control can be used in applications such

• Tangential positioning of a rotatable tool during

• Follow-up of the tool orientation on a band saw

• Positioning of a dresser tool on a grinding wheel

(see diagram)

• Positioning of a cutting wheel for glass or paper

• Tangential infeed of a wire in five-axis welding

Defining following axis and leading axis

TANG is used to define the following and leading

A coupling factor specifies the relationship between

an angle change on the tangent and the following

axis. Its value is generally 1 (default).

The follow-up can be performed in the basic

coordinate system "B" (default) or the workpiece

coordinate system "W".

TANG(C,X,Y,1,"B")

Rotary axis C follows geometry axes X and Y.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition

9.1 Tangential control TANG, TANGON, TANGOF

Path Traversing Behavior

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