Siemens SINUMERIK 828D Operating Manual page 307

If one of the two positions cannot be reached for mechanical reasons, the alternative position
is automatically selected irrespective of the setting of the "Direction" parameter.
Example:
● Machine kinematics with swivel head and swivel table.
● Angular traversing range of rotary axis B from -90 to +90 degrees.
● Swivel table with rotary axis 2 (C) rotates around machine axis Z.
● Angle traversing range of rotary axis 2 (C) from 0 to 360 degrees (modulo 360).
● Machine manufacturer has set the direction reference to rotary axis 1 (B) when he
● A rotation around X (WCS) of 10 degrees is programmed in the swivel cycle.
The diagrams below show the machines in the basic kinematics setting (B = 0 C = 0).
Direction "-" (minus)
Rotary axis B moves to -10 degrees in the
negative direction (red arrow).
Rotary axis C moves to 90 degrees
(rotation around X !)
The two "Minus" or "Plus" direction settings enable a workpiece to be machined with
swiveled planes. The two solutions calculated by the NC differ by 180 degrees (see rotary
axis C).
HMI sl Milling
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
Machine manufacturer
Please also refer to the machine manufacturer's instructions.
Swivel head with rotary axis 1 (B) rotates around machine axis Y.
commissioned the swivel function.
Programming technological functions (cycles)
8.4 Further cycles and functions
Direction "+" (plus)
Rotary axis B moves to +10 degrees in the
positive direction (red arrow).
Rotary axis C moves to 270 degrees
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