Defender Press Brake Guarding System Operation Manual
LS-CS-M-069
Page 12
Original Language Version: 1.04
Released:
01/04/2020
Press Brake Guarding System ensures that the machine does not exceed safe
speed in this mode, particular caution must still be exercised.
3.10
Mute Mode - Restricted (Optional)
The Defender system may be installed on machines that do not support dual speed operation.
However, if these machines cannot close tools at safe speed, any condition that requires safe
speed will trigger an over speed error, and an E-Stop.
In this case the system must be installed with one of the Restricted options enabled. Any
condition that would normally allow closing tools in safe speed (for example, while there is
an uncleared obstruction) is prohibited. Tools must be opened, and the condition that is
forcing safe speed cleared before normal operation can continue. A Mute Mode option can
be set independently for light curtain or laser guarding.
3.10.1
Standard
The default setting is Standard mode, for machines that support dual speed operation and
are able to force safe speed when required by the Defender system.
3.10.2
Restricted 1
The Mute Mode - Restricted 1 option enforces the following conditions.
•
Crawl speed is not permitted in Normal, Tray or Field Muted modes.
•
Any obstruction prohibits tools closing.
•
Tool Setup mode is disabled.
3.10.3
Restricted 2
The Mute Mode Restricted 2 option enforces the following conditions.
•
Crawl speed is not permitted in Normal, Tray or Field Muted modes.
•
Any obstruction prohibits tools closing.
•
Tool Setup mode is enabled.
3.11
Tool Change
When changing the machine tools the transmitter and receiver can be raised and locked
clear, so that the punch can be removed from either end of the machine. After the tool change
the transmitter and receiver are moved back into position, and the transmitter is adjusted for
the correct laser to punch distance. After the tool change is complete, the mute point is then
quickly and easily reset during the first stroke.
3.12
Closed Loop Design
The closed loop design enables monitoring of the stopping distance (overrun) of the pressing
beam every time it stops. If the stopping distance limit is exceeded, an emergency stop signal
is issued and the machine is shut down.
The speed of the pressing beam is also continuously monitored during normal operation. If
safe speed is required (for example if the sensors are muted), but the pressing beam is
moving down beyond safe speed, an emergency stop condition is triggered. The operator will
be prompted to clear the error by pressing the error reset button;
Over speed error
–
PRESS
RESET
.
Note:
Only exceeding safe speed triggers an emergency stop condition. If any other
speed is exceeded (i.e. pressing speed) the pressing beam will be halted, and
the operator will be prompted to clear the error, however this can be done via the
foot pedal. The panel will display the message
Over speed error
–
PRESS/RELEASE
PEDAL.
