
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
- 731 -
Limitation
- Acceleration/deceleration before interpolation
The inner corner override function is disabled during
acceleration/deceleration before interpolation.
- Start-up, G41, G42
The inner corner override function is not carried out for a corner
preceded by a cutter compensation start-up block or a corner followed
by a block containing G41 or G42,.
- Offset value
If the offset value is zero, the inner corner override function is not
executed.
7.1.8.2 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. 7.1.8 (e)). This
function is valid in the cutter compensation mode, regardless of the
G62 code.
Rc
F
×
Rp
Rc: Cutter center path radius
Rp: Programmed tool path radius
It is also valid for the dry run and the one digit F cord feed.
Rc
Tool center path
Rp
Programmed
tool path
Fig. 7.1.8 (e) Internal circular cutting feedrate change
If Rc is much smaller than Rp, Rc/Rp
80; 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 automatic override for inner corners,
the feedrate of the tool is as follows:
F×Rc/Rp×(inner corner override)×(feedrate override)