2.3.5
Machine home position return
Since the machine home position return is concerned with various parameters as shown below,
-
always
be sure
to
execute the setting correctly.
The number of zero-point signal (PGO) counts during machine home position return can
be set within the range from
0
to
255.
If PGO is not available, set this parameter
to
zero.
Down counts
to
HOME
Acceleration/
position
10
counts
deceleration times
ZERO
SIGNAL COUNT
'
position return direction
PARA number 20 Home
position return speed
PARA number 18 Home
position
(factory
setting)
PARA number 21
Creep speed
PARA number 19
Home position address
When the initial position is within the
DOG
switch
:
ON
range, home position return is executed after
:
automatic forwarding
to
outside the
DOG
ON
/
region. (See page
11
.)
-A
A
Near-point DOG signal
ON
Adjust the position of the DOG
swltch
so
it is almost at the center.
Backward limit input
OFF
PARA number 22
&
'
1
..
.
PARA number 12
LSR
limit switch logic
I
Count down
to
HOME
'
:
:
This example
=
3
I
I
1
OFF
$,
,
i,
I
1
,~e;o~po\ntsynh
7
+.
1
The deviation counter
CLEAR
signal is output
to
DRU
at this point. The
HOME
position return
1
Count Count Count
\ON
completion signal
MlOl
status also changes.
u\
u\u u
u
u u
Count start logic
COUNT START
The count start logic
of
the DOG switch can be changed.
I
~~::...:,..:':.::.'.'
e$tfNiirbQ
n
1
OFF
to
ON
I
Turns
ON
at
the
HOME
position
return
completion
I
In
the
AUTO
mode.
Turns
OFF
when
the
mode
is
switched
from
AUTO
to
MANUAL.
Turns
ON
at HOME
position
return
completron
regardless
of
the
mode.
Remains
in
the
ON
state
untii
the
power
IS
turned
OFF.
See
the
above figure
for
settings
'0'
and
'2'
and
the
following figure
for
settlngs
'1'
and
'3',
Acceleration/ PARA number
20
Home position return speed
deceleration times
1
PARA number
18
Home position return direction
PARA number 19
Home position address
PARA number 2%.
I
Creep speed
J
/i
;Deceleration start
Manual forward drive is Set PARA number 22 at
0
necessary when the initial for a stepping motor which
position
is
within this area. does not issue a zero-point
A
signal output.
.Adjust the near-point signal reset point
6:so
it is located almost at the center.
PARA number 12
-
LSR
limit switch logic
Zero-point signal
~
OFF
r
U
U UW
Count
(once if PARA number
22
is set to
1)
x
ON
-25-
__
.
.
....
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