Sentinel Plus Press Brake Guarding System Operation Manual
LS-CS-M-073
Page 21
Original Language Version: 1.04
Released: 19/07/2017
Differences in air temperature around the tool may cause distortion of this image making
the upper tool appear larger than it actually is, as shown in
Figure 3-9
.
This distortion may be caused by:
•
Local weather conditions.
•
Heat generated by the press brake.
•
Heating of the tool during operation.
•
Airflow across the press brake caused by fans, blowers or air conditioners.
In Normal mode receiver camera pixels in the guarded area around the tool tip are grouped
together into ‘sensors’ that are effectively 2mm x 2mm square. In Thermal Compensation
mode the effective sensor size is increased to 4mm x 6mm.
This change requires that the minimum mute point opening is increased to 6mm. As with
Special Tools mode the approximate slow speed point required by the Sentinel Plus is
displayed in the System Information screen, see
Figure 3-8
(refer to
Section 5.7.1
for more
details).
Refer to
Lazer Safe Laser Distortion Causes and Solutions Manual (LS-CS-M-057)
for
further information.
3.10
Tool Set-up Mode (optional)
Tool Set-up mode is provided to allow operation of the machine during tool set-up and
referencing without the Sentinel Plus system raising unnecessary error conditions. Tool
Set-up mode should be considered a special case of Field Muted mode for the Sentinel
Plus. All cautions and restrictions applied to Field Muted mode (see
Section 3.7
) should
also be exercised in Tool Set-up mode. Tool Set-up Mode is only required for some models
of press brakes.
In Tool Set-up mode the Sentinel Plus will attempt to restrict the tool closing speed to crawl
speed (the crawl speed output
Y02
is active). However, some models of press brake ignore
the crawl signal in Tool Set-up mode, and permit higher closing speeds. The Sentinel Plus
Set-up mode will allow these higher closing speeds
on the condition that the sensors
remain clear
.
•
Before entering Tool Set-up mode the LZS-005-R transmitter and receiver must be
aligned with the tool (see
Section 4.1
).
•
If the closing speed is restricted to safe speed in Tool Set-up mode, then the
sensors are effectively muted. Although the laser is ON, t
reat the press brake as if
Field Muted mode was active.
•
If the sensors remain clear
then all speed and direction monitoring is disabled
.
•
If the sensors are obstructed
then safe speed is immediately enforced
.
Warning: NO OPTICAL PROTECTION IN TOOL SET-UP MODE
In Tool Set-up Mode the laser is ON, but the optical protection is disabled.
Although the Sentinel Plus Press Brake Guarding System will ensure that the
machine does not exceed safe speed if the sensors are obstructed, particular
caution must be exercised.
Tool Setup mode is password protected and only accessible to operators with Supervisor
level access. When the TOOL SETUP button is pressed the screen prompts the operator to
enter the Supervisor access code, as shown in
Figure 6-17
.
If the code is correct the Sentinel screen proceeds to the Tool Setup mode screen, and if an
external mute lamp has been installed it will be switched ON to indicate that optical
protection has been de-activated.
