44
107004-15 EN FR26 ROW 0899 Printed in France
Figure 3.8 : Muting of a safety light curtain on a hydraulic press
closing stroke
SM1
SM2
EM2
EM1
SM2
SM1
EM1
TDC
EM2
SM2
opening stroke
SM1
EM1
EM2
SM2
closing stroke
SM1
EM1
EM2
Protection
(SM1 activated)
Muting interrupted
(EM1 activated)
Protection
(EM1&EM2 activated)
Protection
(EM1 activated)
1
4
5
6
6
mm min
.
BDC
SM1
SM2
EM2
EM1
Muting starting
(SM1&SM2 activated)
2
opening stroke
SM1
SM2
EM2
EM1
Muting in progress
(SM2 released)
3
SM1
SM2
OSSDs
ESPE
OSDs
muting
module
EM1
EM2
Muting
lamp
8 ms < t < tmax
t <
∆
max
.
1
0
1
0
1
0
1
0
1
0
1
0
MUTING
1
0
∆
max = 1 mn, tmax = 1 s for a press (For
machines different than presses, refer to
chapter 2.4.2 SM inputs, to change tmax and
∆
max).
BDC (Bottom Dead Center)
point at which the tool is closest to the die
TDC (Top dead Center)
point at which the tool is furthest to the die
The muting sequence starts when the ouput of
the second sensor SM2 switches ON, and it
stops as soon as the output of the first sensor
EM1 switches OFF.
Note :
It is possible to start a muting sequence as
soon as the press tool reaches a position at 6
mm above the BDC. At this position, the
operator is no more exposed to a dangerous
situation, and the starting of the muting
sequence avoids damaging the part if the
detection field of the light curtain is
unexpectedly interrupted.
Содержание SYA14 Series
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