Siemens SINUMERIK 840Di Function Manual page 1733

• Velocity of the preceding block (typically G0).
• Programming the feedrate with FAD
FAD=0 or negative
FAD=...
FAD=PM(...)
FAD=PR(...)
Example:
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
All movements from point P
parallel to the machining plane and the part of the infeed movement up to the safety
clearance.
– FAD programmed with G340:
Feedrate from P or P
2
– FAD programmed with G341:
Feedrate of the infeed movement perpendicular to the machining plane from P
If FAD is not programmed, this part of the contour is traversed at the velocity, which is
active modally from the preceding block, in the event that no F command defining the
velocity is programmed in the SAR block.
– Programmed response:
→
→
→
→
2.4 Tool: Tool radius compensation 2D (TRC)
to point P are performed at this velocity, i.e., the movement
0 2
to P .
3 4
Alarm Output
Programmed value acts in accordance with the active G code of
group 15 (feed type; G93, G94, etc.)
Programmed value is interpreted as linear feed (like G94),
irrespective of the active G code of group 15
Programmed value is interpreted as revolutional feed (like G95),
irrespective of the active G code of group 15
Detailed Description
to P .
2 3
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