Sentinel Press Brake Guarding System Operation Manual
LS-CS-M-066
Page 11
Original Language Version: 1.06
Released:
03/07/2019
2. On the second pedal press the beam moves down in high speed with the front and
rear of the sensors muted for the entire stroke. An obstruction to the front or rear of a
sensor will
not
halt the machine and it will continue down in high speed until the mute
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 zone of the 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
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 zone of a sensor. When Back Gauge mode is enabled,
the rear of the sensor is muted 16 mm above the normal mute point, allowing the back gauge
to enter the work space without causing an obstruction. All other zones of the sensors operate
as per Normal mode.
3.7
Field Muted Mode
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
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.
Laser OFF
Max speed = 10mm/s
Figure 3-7: Field Muted Mode Operation
Warning: NO OPTICAL PROTECTION IN FIELD MUTED MODE
In Field Muted mode, all optical guarding is deactivated. Although the Sentinel
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.).
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.
3.8
Stop at Mute Mode
The Stop at Mute Mode automatically forces the tools to stop closing at the mute point (6mm
/ ¼” opening). To complete the bend the operator must release and press the pedal.