Sentinel Plus Press Brake Guarding System Operation Manual
LS-CS-M-073
Page 15
Original Language Version: 1.04
Released: 19/07/2017
R M
F
Figure 3-3: LZS-005-R Block Laser Receiver
The guarding area around the tool tip is divided into three zones; front middle and rear
(labelled
F
,
M
and
R
in
Figure 3-3
). In the illustrations describing the operation of the
Sentinel Plus the lasers are shown in segments to highlight the sensor zones, however the
guarding region is a continuous band around the tool tip. The system can mute these
individual zones when forming various shape work pieces (e.g. tray and box shaped parts).
3.3.3
Setup
The LZS-005-R receiver employs a two dimensional camera sensor which detects the laser
light projected by the transmitter. This effectively captures an image of the tool silhouette,
and any object (an obstruction) that enters the guarded region.
When the system is first started the Sentinel Plus automatically performs a tool alignment.
As long as the silhouette of the tool tip is within the target area of the receiver
(approximately the centre of the receiver window), the guarded area can be adjusted to
coincide with the tool tip. If the tool tip is outside of the target area, the operator will be
directed to physically move the LZS-005-R receiver so that the tool tip lies within the target
area.
Section 4.1
explains how the operator is guided by the LZS-005-R receiver to the
correct alignment position.
3.3.4
Mute Point
The mute point must first be established so that the system will not treat the material being
formed as an obstruction. The mute point is automatically set at 2mm above the surface of
the material as the tools close for the first stroke. This mute point set-up can be initiated
whenever the tools are changed or the material thickness changes.
3.4
Normal Mode
This is the default mode at start-up. In Normal Mode all detection regions (front, middle and
rear) are active. When the foot pedal is pressed the system checks that the guarded area is
clear and allows the tools to close in high speed.
The sequence of diagrams in
Figure 3-4
shows the guarded region around the tool tip
descending through the mute point. As the guarded region passes through the mute point
the sensors in the receiver are muted row by row, until the mute point is reached,
whereupon the entire guarded region is muted. The machine must decelerate to pressing
speed before the mute point is reached. The laser transmitter is always active in Normal
mode.
Receiver Window
Guarded Area
2mm Mute Point
