
PROGRAMMING
5. FEED FUNCTIONS
B–63124EN/01
54
c
d a
LsLe
b
Ls Le
(2)
Programmed path
Cutter center path
Tool
Fig. 5.4.2.1 (d) Override Range (Straight Line to Arc, Arc to Straight Line)
An override value is set with parameter No. 1712. An override value is
valid even for dry run and F1–digit specification.
In the feed per minute mode, the actual feedrate is as follows:
F × (automatic override for inner corners) × (feedrate override)
The inside–corner override function is disabled during pre–interpolation
acceleration/deceleration.
The inside–corner override function is disabled if a block before the
corner is a start–up block for cutter compensation or a block after the
corner contains G41 or G42.
The inside–corner override function is disabled if the offset data is 0.
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. 5.4.2.2). This function is valid
in the cutter compensation mode, regardless of the G62 code.
F
Rc
Rp
Rc : Cutter center path radius
Rp : Programmed radius
It is also valid for the dry run and the one–digit F command.
Rc
Rp
Programmed path
Cutter center
path
Fig. 5.4.2.2 Internal circular cutting feedrate change
Override value
Restrictions
D Pre–interpolation
acceleration/deceleration
D Start–up or G41 and G42
D Offset data
5.4.2.2
Internal Circular Cutting
Feedrate Change