Return-To-Origin Procedure - Yamaha RCX141 User Manual

c
CAUTION
Before performing return-to-origin,
check that all axis arms are in
positions that allow return-to-origin
operation.
w
WARNING
The robot starts moving as soon
as return-to-origin is performed.
To avoid hazardous situations,
do not enter the robot movement
range.
c
CAUTION
Emergency stop might be triggered if
return-to-origin or absolute search is
simultaneously performed on three or
more axes whose return-to-origin
method is the stroke end detection
method. In this case, change the
setting so that stroke end return-to-
origin or absolute search is
simultaneously performed on two
axes or is performed separately on
each axis.
n
NOTE
When two robots are specified, return-
to-origin is first performed on the main
group and then on the sub group.
n
NOTE
• Refer to "11.8.1 Return-to-origin
operation" for details on return-to-
origin operation, and refer to "11.8.2
Semi-absolute" for details on
absolute search operation.
• The machine reference is expressed
as a percentage of the number of
encoder pulses showing the
difference between the origin sensor
signal and position detector
reference signal (encoder zero
signal, etc.). This is also called the
"grid position" or "grid pulse".
n
NOTE
Once return-to-origin is completed, the
origin position is retained until the
controller power is turned off or
system parameters are changed. So it
is not necessary to re-perform return-
to-origin even after using emergency
stop.
11.8.3

Return-to-origin procedure

This section explains how to perform return-to-origin on all axes specified by the controller.
The robot must be at servo-on to perform return-to-origin on incremental mode axes
using the stroke end detection method or sensor method for return-to-origin. Likewise,
the robot must be at servo-on to perform an absolute search on semi-absolute mode axes.
[Procedure]
1) In "MANUAL" mode, press the
A confirmation message appears on the guide line in the programming box screen.
Press the (YES) key to perform return-to-origin.
F 4
Press the (NO) key to cancel return-to-origin.
F 5
Fig. 4-11-85
MANUAL
Current position
*M1= 21593 *M2=
Origin return again?
2) After return-to-origin (absolute search on semi-absolute mode axes) is complete, the
machine reference on each axis is displayed.
Fig. 4-11-86
MANUAL
Machine reference (%)
M1=
POINT PALLET
3) When return-to-origin on all axes is complete, the dashed line (- - - -) on the message
line changes to a solid line (––––) indicating that return-to-origin is now complete.
Then, pressing an axis movement key displays the current position on each axis.
4) To cancel the return-to-origin operation, press the
In this case, the message "0.14: Stop executed" appears on the message line.
11. "MANUAL" mode
(ORIGIN) key.
F 3
50%[MG][S0H0J]
8216 *M3=
YES
50%[MG][S0H0J]
50 M2= 50 M3=
ORIGIN VEL+
STOP
68468
NO
50
VEL-
key.
129
4-
4