
4.DESCRIPTION OF PARAMETERS B-63330EN/03
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#7 #6 #5 #4 #3 #2 #1 #0
6600 COV
[Input type] Parameter input
[Data type] Bit
#0 COV Specifies whether a circular cutting point feedrate change is valid.
0: Valid at all times.
1: Valid only in the automatic corner override (G62) mode.
6610 Minimum deceleration rate (MDR) for circular cutting feedrate change
[Input type] Parameter input
[Data type] Integer
[Unit of data] %
[Valid data range] 0 - 100
Set a minimum deceleration rate (MDR) for automatic corner override
in circular cutting feedrate change.
When an arc is cut with the tool shifted inward, the arc cutting
feedrate is calculated using the expression shown below, where F is a
specified feedrate. Then, the feedrate along the programmed path
becomes the specified feedrate (F) .
Rc: Radius of the tool center path
Rp: Programmed radius
Programmed path
Tool center
path
Rc
Rp
If Rc is too small for Rp, the fraction Rc/Rp becomes almost 0, and
the tool stops. For this reason, the minimum deceleration ratio (MDR)
is set, and the tool feedrate is calculated as F×MDR when
Rc/Rp≤MDR.
Rp
Rc
F ×