
2000/02/08 H. Minami
A-78392EN
FANUC Series 16i/18i/21i-MA
Embedded macro for measurement
Title
Drawing No.
Page
Descri
tionDateEdit
17/36
Note ) Please be sure to move the probe right over the approximate center of inside
circle before executing this cycle.
Movements
:
1. The probe moves the distance (Z) along the –Z axis with feed-rate (fa).
2. Moving the distance (R –
α
– stylus radius) along the +X axis with feed-rate (fa).
3. Moving within the distance (R +
γ
– stylus radius) with the feed-rate (f) until touching
the work-piece.
4. Return the measuring start point with rapid traverse.
5. Repeat steps 1. to 4. in the direction –X axis and
±
Y axis.
→
First measurement
6. Moving to the position (1
st
measuring position -
β
) along the +X axis with feed-rate (fa).
7. Moving within the distance (
β
+
γ
) with the feed-rate (F) until touching the work-piece
8. Repeat steps 6. to 7. in the direction –X axis and
±
Y axis.
→
Second measurement
When
G184
is executed, the system will calculate the center position and radius of circle
from measurement position and output it to the work-piece origin offset value and the
following variables.
#250
: X coordinate of circle center (Machine coordinate system)
#251
: Y coordinate of circle center (Machine coordinate system)
#252
: X coordinate of circle center (Work-piece coordinate system)
#253
: Y coordinate of circle center (Work-piece coordinate system)
#254
: Radius of circle
R
α
1
st
Measure
Z
Measuring
start
oint
Stylus radius
γ
2
nd
Measure