Sentinel Plus Press Brake Guarding System Operation Manual
LS-CS-M-073
Page 16
Original Language Version: 1.04
Released: 19/07/2017
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Figure 3-4: Normal Mode Operation
3.4.1
Obstruction Detection
–
From a Stationary Position
If any part of the guarded region is obstructed when the pedal is pressed then the tools will
not move and the message
Sensors blocked
–
RELEASE FOOT PEDAL
will be displayed. The
operator must release and press the pedal again. If the sensors are clear then the tools will
start closing in high speed. If any sensor remains obstructed, the system will force the tools
to close in safe speed only with the optical protection muted and display the message
LASERS INACTIVE
until the bend is completed. The sensors become active again once the
tools are opened.
3.4.2
Obstruction Detection
–
When Tools are Closing
During high speed closing all sensors are active. If any part of the guarded region is
obstructed then the closing movement is stopped and the message
Sensors blocked
–
RELEASE FOOT PEDAL
will be displayed. The operator must release and press the pedal to
continue. If the sensors are clear then the tools will start closing in high speed. If any sensor
remains obstructed, the system will force the tools to close in safe speed only with the
optical protection muted and display the message
LASERS INACTIVE
until the bend is
completed. The sensors become active again once the tools are opened.
Note:
If the Sentinel Plus system has been installed on an up-acting machine, the
Normal mode behaviour is slightly different from that described above, due to
the configuration of the up-acting hydraulics. An additional control input is
provided; the Open Tools Enable button.
When the enable outputs are turned off (say due to an obstruction), they will
remain in the off state after the foot pedal has been released. They will turn on
when the operator next presses the foot pedal to close tools.
The operator can turn on the enable outputs to open tools by pressing the
Open Tools Enable button. The enable outputs will remain on only while the
tools are opening, and will turn off again at the end of travel.
3.5
Tray/Box Modes
The Sentinel Plus supports two types of Tray/Box mode. In Normal mode a workpiece with
large side flanges (as shown in
Figure 3-5
) would trigger an obstruction and force the press
into slow speed for a long distance.
Tray/Box mode temporarily mutes the front and rear guarded regions, allowing high speed
down movement until the normal slow speed point.
2mm Mute
Point
