
5.FEED FUNCTIONS PROGRAMMING B-63944EN/02
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- Offset
Override for inner corners is not performed if the offset is zero.
5.4.2.2 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 (Fig. 5.4.2(e)). This
function is valid in the cutter compensation mode, regardless of the
G62 code.
Rp
Rc
F =
Rc : Cutter center path radius
Rp : Programmed radius
It is also valid for the dry run and the one-digit F code feed command.
Rc
Rp
Programmed
Cutter center
path
Fig. 5.4.2(e) 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. 1710.
When Rc/Rp≤MDR, the feedrate of the tool is (F×MDR).
CAUTION
When internal circular cutting must be performed
together with override for inner corners, the
feedrate of the tool is as follows:
override) (feedratecorners)inner for the (override ×××
Rp
Rc
F