Siemens SINUMERIK 840D sl Function Manual page 840

Rotary Axes (R2)
13.1 Brief Description
Types of rotary axis
Depending on the application, the operating range of a rotary axis can be unlimited
(endlessly rotating in both directions [MD30310 $MA_ROT_IS_MODULE = 1]), limited by a
software limit switch (e.g., operating range between 0° and 60°) or limited to an appropriate
number of rotations (e.g., 1000°).
Some typical rotary-axis applications are listed below.
Typical applications
● 5-axis machining (operating range limited or unlimited)
● Rotary axis for eccentric machining (unlimited operating range)
● Rotary axis for cylindrical or form grinding (unlimited operating range)
● C axis with TRANSMIT (unlimited operating range)
● Rotary axis on winding machines (unlimited operating range)
● Rotary workpiece axis (C) on hobbing machines (unlimited operating range)
● Round tool magazines and tool turrets (unlimited operating range)
● Rotary axis for peripheral surface transformation (limited operating range)
● Swivel axes for gripping (operating range 360°)
● Rotary axes for swiveling (operating range < 360°; e.g., 60°)
● Milling swivel axis (A) on hobbing machines (operating range, e.g., 90°)
Axis addresses
Coordinate axes and directions of movement of numerically-controlled machine tools are
designated according to DIN.
DIN 66025 specifies the following axis addresses for rotary or swivel axes:
● A, B and C with X, Y and Z as middle axis
This means that A rotates about X, B rotates about Y and C rotates about Z (see fig.).
● The positive rotary-axis direction of rotation corresponds to a clockwise rotation when
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looking in the positive axis direction of the corresponding middle axis (see fig.).
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions