Fagor CNC 8060 - Page 490

·490·
Installation manual
CNC 8060
CNC 8065
9.
CONCEPTS.
(REF: 1402)
Configuration of the HSC mode (High Speed Cutting).
than what appears on the graph. The CNC has the following variables to analyze the cause
of this feedrate reduction.
To analyze the cause of feedrate reduction, use a trace of the oscilloscope that shows an
undesired feedrate reduction. Move the cursor to the value where the theoretical feedrate
(V.[ch].G.PATHFEED) decreases and check whether the cause that limits the feedrate may
be adjusted or the generated error is greater than the one programmed.
Causes that limit the feedrate on the tool path.
Check the V.[ch].G.AXLIMF variable to know which axis is limiting the feedrate and the
V.[ch].G.PARLIMF variable to know the reason why this axis is limiting the feedrate. This last
variable returns one of the following values.
The error incurred by the spline may be checked with the V.G.LIMERROR variable.
Depending on the cause, some HSC adjusting parameter may be tweaked.
• Parameter CURVACC may be changed if the feedrate is limited by the acceleration due
to curvature).
• Parameter CURVJERK may be changed if the feedrate is limited by the jerk due to
curvature).
Causes that limit the feedrate at the corners.
Check the V.[ch].G.AXLIMC variable to know which axis is limiting the feedrate and the
V.[ch].G.PARLIMC variable to know the reason why this axis is limiting the feedrate. This last
variable returns one of the following values.
Variable. Meaning.
V.[ch].G.PARLIMF Cause that limits the feedrate at the block being executed.
V.[ch].G.AXLIMF Logic number of the axis that limits the feedrate at the block being
executed.
V.[ch].G.PARLIMC Cause that limits the feedrate at the corner in the current block.
V.[ch].G.AXLIMC Logic number of the axis that limits the feedrate at the corner, in the
block being executed.
V.[ch].G.LIMERROR Value of the error that cancels the splines (CONTERROR mode).
V.[ch].G.PATHFEED Theoretical feedrate on the tool path.
V.[ch].G.FREAL Real feedrate on the tool path.
Value. Meaning.
1 Maximum feedrate of the axis.
2 Acceleration due to curvature (parameter CURVACC).
3 Jerk due to curvature (parameter CURVJERK).
6 Error committed by the spline.
7 Insufficient memory due to very small blocks and/or buffer full.
10 Maximum axis feedrate in transformations.
11 Maximum axis acceleration in transformations.
Value. Meaning.
1 Maximum feedrate of the axis.
4 The acceleration at the corner (parameter CORNERACC).
5 The jerk at the corner (parameter CORNERJERK).
8 The chordal error at the corner ( CONTERROR).
9 Geometry at the corner (FAST mode).