Sentinel Plus Press Brake Guarding System Operation Manual
LS-CS-M-073
Page 18
Original Language Version: 1.04
Released: 19/07/2017
2. On the second pedal press the beam moves down in high speed with the front and
rear regions muted for the entire stroke. An obstruction to the front or rear sensor
will
not
halt the machine and it will continue down in high speed until the slow speed
point. If this second pedal press does not occur within the three second timeout, the
cycle is reset, and Step 1 above must be repeated.
The middle sensor is always active, regardless of which Tray/Box mode is selected. It
guards through the entire stroke (until the mute point), as described in
Sections 3.5.1-
3.5.2
above.
3.6
Back Gauge Mode
Back Gauge mode is used in cases where the back gauge of the press brake is moving
forward far enough to obstruct the rear sensor. When Back Gauge mode is enabled, the
rear sensor is muted 16mm above the normal mute point, allowing the back gauge to enter
the work space without causing an obstruction. All other sensors operate as per Normal
mode.
3.7
Field Muted Mode
Warning: NO OPTICAL PROTECTION IN FIELD MUTED MODE
In Field Muted mode, all optical guarding is deactivated. Although the Sentinel
Plus Press Brake Guarding System ensures that the machine does not exceed
safe speed in this mode, particular caution must still be exercised.
Entry to Field Muted mode can be password protected, and should only
be used by suitably trained personnel, and only in exceptional
circumstances (changing tools, maintenance, etc.).
In Field Muted mode, protection provided by the laser guarding is muted for the entire
stroke of the beam and therefore does not provide any optical protection. However, the
Sentinel Plus system maintains all of its other safety functions. For example, it continues to
monitor that the closing of the tools occurs at safe speed and stops the machine if that
speed is exceeded.
Field Muted mode should only be used in cases where no alternative guarding mode is
acceptable. Field muted mode can be password protected by personnel with Supervisor
level menu privileges.
Figure 3-6: Field Muted Mode Operation
3.8
Stop at Mute Mode
The Stop at Mute Mode automatically forces the tools to stop closing at the mute point (a
2mm opening). To complete the bend the operator must release and press the pedal.
