Siemens SINUMERIK 840DE SL - Page 158

Detailed Description
2.3 Continuous-path mode
Continuous-Path Mode, Exact Stop, LookAhead (B1)
2-10 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Implicit continuous-path mode
If it is not possible to insert approximate positioning blocks due to the very short block path
lengths (e.g., zero-clocked blocks) in continuous-path mode with approximate positioning
G641, the mode is switched over to continuous-path mode G64.
The figure below shows how the function velocity drops according to an overload factor.
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Fig. 2-3 Axial velocity change on block transition