
B-63323EN-1/03 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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- Internal circular cutting feedrate change
For internally offset circular cutting, the feedrate on a programmed
path is set to a specified feedrate (F) by specifying the circular cutting
feedrate with respect to F, as indicated below.
Rp
Rc
F ×
Rc : Cutter center path radius
Rp : Programmed radius
It is also valid for the dry run and the F1-digit feed command.
Fig. 7.1.8 (b) Internal circular cutting feedrate change
If Rc is much smaller than Rp, Rc/Rp≡0; the tool stops. A minimum
deceleration ratio (MDR) is to be specified with parameter No. 6610.
When Rc/Rp≤MDR, the feedrate of the tool is (F×MDR).
NOTE
1 By setting parameter CAFC (bit 5 of No. 1402), the
circular cutting feedrate can be changed even when
an offset is applied externally.
2 This function is enabled in cutter compensation
mode, regardless of the setting of G62. By setting
parameter COV (bit 0 of No. 6600), the function can
be enabled in G62 mode only.
Caution
CAUTION
When circular cutting must be performed together
with automatic override for inner corners, the
feedrate of the tool is as follows:
F×(Rc/Rp)×(inner corner override)×(feedrate
override)
Programmed path
Cutter center
path
Rc
Rp