Variables Associated With Feedrate Limitation - Fagor CNC 8060 Installation Manual

I n s t a l l a t i o n m a n u a l .
13.4.3

Variables associated with feedrate limitation.

V.[ch].G.PERFRATE
Percentage of blocks managed by the CNC in block preparation, with respect to the best
possible to reach the maximum feedrate in each section.
Remarks.
This variable can return a value close to 100; if the percentage of blocks is lower than 100%,
the HSC might be losing room to increase the feedrate, respecting the available room to
brake. To know if this is the case, it will be necessary to analyze the V.G.DROPRATE variable
because the reason the feedrate is not increasing might be geometrical and not due to the
number of blocks available.
V.[ch].G.DROPRATE
Percentage of reduction of the maximum feedrate possible.
Feedrate reduction may be due to an improper supply of blocks or because a feedrate lower
than possible has been programmed.
Remarks.
This variable can return a value close to 100; if the value is lower than 100%, the CNC may
increase the feedrate if it has more blocks. To know whether the CNC can supply more blocks
or not, it will be necessary to analyze the V.G.PERFRATE variable.
If both variables have a value lower than 100, parameter PREPFREQ may be increased to
increase the supply of blocks as long as the system has enough time; in other words, the
percentage of cycle time used by the CNC is not too close to the total cycle time (about 50%).
This information may be checked in the V.G.NCTIMERATE variable.
V.[ch].G.LIMERROR
Value of the error that cancels the splines (CONTERROR mode).
This variable may be used to evaluate whether the program is generated with more error
than we demand from the HSC mode or not.
Special returned values.
This variable returns one of the following values.
Value. Meaning.
-1 The generated profile does not exceed the programmed error. The
programmed error does not limit the maximum feedrate of the axis.
### Value of the error that cancels the splines (CONTERROR mode).
V.[ch].G.AXLIMF
Logic number of the axis that limits the feedrate at the block being executed.
Together with the V.G.PARLIMF variable, it may be used to evaluate the behavior of the
machining operation in a particular section where the feedrate decreases too much or is
irregular.
V.[ch].G.PARLIMF
Cause that limits the feedrate at the block being executed.
13.
CNC 8060
CNC 8065
(R : 1709)
EF
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