YASKAWA yasnac lx3 - Page 216

52.3.14 Writing Procedure (Cent’d )
Note: The work coordinate system shift memory
value writing mode setting is invalid if a single
zero point return is not performed after power
SU@Y .
Z-AXIS WORK
COORDINATE SYSTEM
1
SHIFT AMOUNT
I
‘1
D-
1
l–
B
Z-AXIS TOOL
COORDINATE MEMORY
VALUE
-i
I
Fig.
5.1OG
X-AXIS TOOL
“/
COORDINATE MEMORY
AMOUNT
Coordinate system
5. 2.4 G 50 POINT RETURN ‘
With this function,
the tool can be brought back
to the start point of the program (where coor–
dinate system was set up) , from any position
along the automatic operation tool locus. This
is convenient when an automatic machining cycle
is interrupted due to tool breakage, etc. and,
after replacing the tool, etc ., the automatic
machining cycle is to be started from the begin–
:ning.
Fig. 5.11
The operation procedure for this return is as
follows .
(1) Interrupt the automatic operation cycle by
pushing the emergency stop button.
(2) Turn on the MANUAL mode.
(3) Retract the tool by the manual tool motion
control.
(4) Eliminate the cause of the machining pro-
cess interruption,
and make the machine
and workpiece ready for operation.
(5) Turn the G50 POINT RETURN switch on.
(6)
Turn on the MANUAL JOG mode.
(7)
Push one or two JOG keys that correspond
to the required return motion direction
among the four (+X, -X, +Z, –Z) .
The tool moves at a preset speed towards
the G 50 point, and stops at the G 50) point.
(8) Turn off the G50 point RETURN switch.
(9) Turn on the AUTO mode, and push the
RESET key on the MDI & CRT panel.
(In the TAPE mode, reset the tape to the
leading end. )
( 10) push the CYCLE START key to restart the
automatic machinihg cycle.
Notes :
1. When the tool is at the G50 point, JOG motion
control is not effective unless the G50 POINT
RETURN switch is turned off.
2.
The point where a coordinate system setup
process has been executed latest is regarded
as the G50 point. Therefore, in the following
cases, the tool will not return to the start
point of the machining cycle by this function.
a.
The respective tools are set for different
coordinate systems.
b. When the ORG key is pushed after the
interruption of the automatic cycles.
OF FAULT
(EMERGENCY STOP1
208
c.
When a coordinate system has been set up
automatically .