
2000/02/08 H. Minami
A-78392EN
FANUC Series 16i/18i/21i-MA
Embedded macro for measurement
Title
Drawing No.
Page
Descri
tionDateEdit
8/36
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
ring gauge.
4. Returns the measuring start point and repeat steps 1. to 3. in the direction –X axis and
±
Y axis.
→
First measurement
5. Moving the point (1
st
measuring position -
β
) along +X axis with feed-rate (fa).
6. Moving within the distance (
β
+
γ
) with the feed-rate (F) until touching the ring gauge.
→
Second measurement
7. Repeat steps 5. to 6. in the direction –X axis and
±
Y axis.
8. After executing M** (180
°
spindle orientation), repeat steps 1.to 7.
When
G172
is executed, the system will calculate the stylus ball offset for X, Y axis from
measurement position and output it to the following variables.
#203
: Stylus ball offset for X axis
#204
: Stylus ball offset for Y axis
α
R
1
st
Measure
Ring gauge
Z
Probe
Measuring
start point
β
γ
Ring gauge
2
nd
Measure