
B-63173EN-1/01-15
13/17
EDIT
DATE DESIG. DESCRIPTION
FANUC Power Mate i-MODEL H
Enhancement of Electronic CAM
Function Specifications
DRAW.NO. CUST.
SHEET
01
00.08.07 New design
TITLE
Stop external axis (From external synchronization to internal synchronization)
Stop the CAM shaft (external axis) by the following way and switch to the internal synchronization
(imaginary axis).
1
Watch the position of the external axis. When the external axis comes to the designated point, stop
the external axis. At the same time, turn both follow-up signal *FLWU(G007#5) and CAM shaft
changing signal ECMCHG G239#2 to “1”.
2
After above, internal pulses start outputting with keeping the velocity of the external axis at the
time when CAM shaft changing signal is turned to “1”. The CAM followers start synchronization
with internal pulses (internal synchronization).
Stop internal synchronization
Stop the internal synchronization by the following way.
1
Watch the position of the CAM shaft (imaginary axis). Turn CAM follower selection signal
ELCAM* G238 for each axis to “0” when the imaginary axis comes to the point where each
follower should stop.
Stop follower #2 Stop follower #1 Stop follower #3
ELCAM2=0 ELCAM1=0 ELCAM3=0
•
If the velocity difference of the CAM follower (moving distance) is larger than the value of
the parameter No.8090 (the tolerance of the velocity difference of the CAM follower at
start/stop synchronization in electronic CAM function), the CAM follower is waiting. If the
velocity difference is smaller than the tolerance, the CAM follower will stop. Please refer
more detail in the chapter 2.2. Consider that there exists the scatter and delay about from
24msec to 32msec to output the position switch signal.
2
Electronic CAM operation is finished.
Turn electronic CAM function completion signal ECMEND G239#1 to “1” or activate the
reset signal.
3
Perform follow-up and reflect the difference of CAM shaft (external axis) to the machine coordinate.
Turn both the follow-up signal *FLWU G007#5 and CAM shaft changing signal
ECMCHG G239#2 to “0”.
4
Perform the coordinate preset (G92) so that the machine coordinate of CAM shaft (external axis)
has the same value of the absolute coordinate.
For instance, execute the following part program.
G92 C#5021 ; (In case that CAM shaft is the first axis and its name is C)
#5021 is the macro system variable and to treat the machine coordinate of the first axis. Please
refer to the “FANUC Power Mate i-D/H OPERATOR’S MANUAL” for more detail of the system
variable.