Yaskawa YASNAC PC NC Programming Manual User Manual
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YASNAC PCNC Programming Manual
Chapter 4: Enhanced Level Commands
(3) Corner Feedrate B Specification
When the corner feedrate B specification is optionally selected, the following three functions
can be used.
•
Automatic arc-corner feedrate designation function
•
Automatic deceleration distance designation function
•
Start-up G107 mode selection function
(a) Automatic arc-corner feedrate designation function
The function automatically determines the feedrate to be applied to movements along arc-
corners so that the tolerance (error between the programmed arc and the actual tool path)
at the arc shaped (G02, G03) corners will be equal to the value set for the parameter.
This function is valid when both of the following requirements are satisfied.
•
Parameter pm4031 D2 = 1
•
A value equal to or greater than “1” is set for arc tolerance parameter pm041 6 (“mm”
mode) or pm0417 (“inch” mode).
In the case of the example of the program indicated below, feedrates to be applied to the
movements along the arc-corner and the leading and trailing sections are shown in Fig.
4.2.7.2. The broken lines in Fig. 4.2.7.2 represent the feedrate waveform.