10/01/20071.08 New error code display sequence information added.
4/07/2007 1.09
24/07/20071.10 Language settings added to parameter settings
03/12/2007 1.11 Updated error code section and listing
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"Lazer Safe", "LZS", "LZS-003", LZS-003-SS4", "LZS-003-SS6", "LZS-003-HS", "PCSS" and"Press Control SafetySystem" are trademarks of Lazer Safe Pty Ltd.
The content of this manual is supplied forinformationaluseonly,issubjectto change without notice and should not be construed as a commitment byLazer Safe Pty Ltd. Lazer Safe Pty Ltd assumes no responsibility or liability for anyerrors, inaccuracies oromissions that may appear within this publication.
Copyright in this documentation is owned byLazer Safe PtyLtd. No part of this document maybe reproduced or copied in any form or by anymeans (graphic, electronic, or mechanical including photocopying, recording, taping, or information storage and retrieval systems) without the written permission of Lazer Safe Pty Ltd.
Lazer Safe's copyright in this document is protected byAustralian copyright laws(including the Copyright Act 1948(Commonwealth)) and by international copyright treaties.
All operators of the LZS-003-HS equipment should be trained to use it and the press brake upon which it is installed in a manner that complies with established safety practices.
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This manual should be used in conjunction with;
•The Operation Manual for your press brake
•The Lazer Safe Transmitter and Receiver Alignment Manual
This symbol indicates helpful information that helps you make better use of yourLazer Safe product.
Caution
This symbol alerts you to situationsthat could result in equipment damage
Warning
This symbol indicates danger. You are in a situation that could cause bodily injury.Before you work on any equipment, be aware ofthe hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. To seetranslations of the warnings that appear in this publication, refer to the translated
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LS-CS-M0005-EN LZS-003-HS Operation Manual – DualLaser Version
The LZS-003-HS is designed to protect hands and fingers in the area close to the edge of thepunch. When installed correctly and safety instructions are observed fully, the LZS-003-HS permitssafemanipulation close to the punch, as well as offering effective protection while tools close at high speed.
Please note these general safety notices:
•The LZS-003-HS is designed exclusively for installation and operation on hydraulic press
brakes, or press brakes that comply with the statutory machine safety and accidentprevention rules and regulations valid for the place where the press brake is operated, inparticular after the LZS-003-HS has been installed.
•The LZS-003-HS must be installed either in the press brake factory, or by specialist
technicians trained by Lazer Safe (or its authorised representatives).
•The operator must be fully conversant with the operation of the press brake and the risks
associated with it, as well as the operation of the LZS-003-HS guarding system.
•The alignment of the protective equipment for punches of different lengths should be
performed by a die setter (or someone with equivalent specialist expertise) trained in allrelevant aspects of operating the press brake and the LZS-003-HS guarding system.
•Suitable protective equipment must be worn by the operator at all times.
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To ensure the highest possible degree of safety in operating a press brake fitted with the LZS-003-HS, it is important to note the following special warnings.
Warning: AVOID FAST, ERRATICMOVEMENTS AS TOOLS CLOSE
When the tools close at high speed (above mute point) towards a static (fixed) obstruction,there will be less than maximum protection at the point where the laser detects the obstruction. For example, if a small obstruction, such as a finger, is rapidly and erratically pushed between punch andobstructionimmediatelybeforethe
laser senses the static obstruction, the finger might be touched.
Warning: NO PROTECTION BETWEEN MUTE POINT AND WORKPIECE
In Normalmode, the LZS-003-HS protects until the laser is within 2mm of thematerial surface. Even though this gap is too small for a finger to be inserted, always
exercise care.
Warning: NO PROTECTION IN FIELD MUTED MODE
In Field Muted mode, the optical sensing is deactivated. Although the LZS-003-HS ensures that the machine does not exceed crawl speed in this mode, particular caution must still be exercised.
The LZS-003-HS Operator Panel requires a password to enable the Field Muted mode button. The password should only be available to suitably trained personnel.
Field Muted mode should only be used by suitably trained personnel and onlyin exceptional circumstances (changing tools, maintenance, etc.)
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33
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The Lazer Safe LZS-003-HS is a guarding system for hydraulic press brakes that provides a highly effective solution for both operator safety and machine productivity.
The system comprises the following components:
•LZS-003-HS Controller
•Operator Panel
•Optical Encoder
•Laser Transmitter / Receiver pair
•Brackets for mounting the Transmitter and Receiver
The LZS-003-HS can be installed either at the time of manufacture or as a retrofit to a press brake already in service.
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•Delivers comprehensive operator protection at
close proximity to work piece.
•Allows tools to close at high speed, increasing
productivity.
•Complex shapes can be achieved with the "Tray /
Box" and "Field Muted" modes of operation.
•Encoder feedback provides closed-loop monitoring
of speed and stopping distance of the press beam.
•A flat band of continuous laser light detects
obstructions as small as 4mm while remaining vibration tolerant.
•The mute point is automatically determined, easily
set and continuously monitored.
•The rear section of laser is easily muted to ignore the back gauge in "up-close" situations.
•Failure detection is performed by real-time monitoring of the process under control.
The LZS provides protection at close proximity to work-piece.
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The transmitter and receiver are mounted on theupper beam of the press brake, allowing the operator to remain close to the work-piece as the tools close at high speed. Hands and fingers are protected by a continuous band of laser light that senses the zone below the punch. If anobstruction is detected the beam movement is stopped. The punch cannot make contact with the obstruction.
The LZS-003-HS system continuously monitors the critical speeds and stoppingdistanceofthemoving member of the machine. If the crawl speed is exceeded and / or the stopping distanceis exceeded, the LZS-003-HS controller will issue a stop command to the machine. There is no need for a separate stopping distance monitor.
3.2.1LZS-003-HS High Speed Dual Laser Model
For press brakes witha high closing speed (150 mm / sec or faster) the LZS-003-HS is recommended (4mm and 14mm below the punch. The lower laser (laser B) triggers the deceleration of the press to bending speed while the higher laser (laser A) continues to provide protection.
Figure 3-1). This model features a transmitter with two parallel lasers that are
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LS-CS-M0005-EN LZS-003-HS Operation Manual – DualLaser Version
Laser to punch
distance
Laser A 4mm
Laser B 14mm
Mute point
Figure 3-1: LZS-003-HS Dual Laser
3.2.2Setup
During setup the laser is set at a distance of 14mm below the tip of the punch. When using the LZS-003-HS dual laser only the lower laser (Laser B) is switched on during set-up.
Laser B to
punch distance
Mute point
14mm
2mm
Figure 3-2: Laser to punch distance / Mute point distance
3.2.3Mute Point
The Mute point must first be established so that the LZS-003-HS will not treat the material being formed as an obstruction. The Mute point is automatically set at 2.0mm above the surface of the material as the tools close for the first stroke. This mute point set-up can beinitiated whenever the material thickness is substantially changed.
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3.2.4Normal Mode
Ifnoobstructionisdetected,the tools close at high speed until the laser reaches the mute point and continue at pressing speed with the sensing functions muted, bending the material until finished.
In normal mode, the entire width of the laser (front, middle and rear) is activated for recognition of obstructions. As the punch moves towards the work piece, the laser will detect obstructions ahead of the tip of the punch until it reaches the mute point, thereby covering the range wherethe beam is allowed to travel at high speed. When an obstruction is detected, the beam stops.The punch will not touch the obstruction.
Should the operator decide to continue with the stroke, the foot switch will have to be depressed again. The tools will begin to close. If however the obstruction has not been removed and is still detected the cycle will be completed in crawl speed with the sensing function muted. This feature is important for jobs where the shape of the work piece will obstruct the laser.
Mutepoint
Figure 3-3: Normal Mode operation
3.2.5Tray / Box Mode
When making boxes or trays, two opposing side walls are bent first. The work piece is thenturned horizontally so the remaining two side walls can be bent. The two previously bent side walls now obstruct the front sectionof the laser and cause the system to mistake them for a
dangerous obstruction. In this situation, if the system is in Normal Mode, the beam will come
to a stop and wait for operation of the foot switch. Then, if the work piece is kept in place and the foot switch is depressed it will only be possible for the tools to close at crawl speed andtime will be lost.
The LZS-003-HS Tray /Box Mode eliminates this lost time by allowing the beam to continue in
high speed to the mute point only after stopping at the top of the side wall. The foot switchmust be depressed to resume closing of the tools. The front, centre and rear sections of thelaser areactive from the top of the stroke to the top of the side wall. Upon reaching the side wall, the front and rear sections of the laser are deactivated for the remainder of the stroke.
Mutepoint
Mutepoint
The centre section of the laser remains active until the mute point is reached, unless anobstruction is detected.If an obstruction is detected by the centre section, the beam will stopand continuation of the stroke to the mute point will only be possible in crawl speed.
Tray / Box Mode may also be used to ignore interference from the back gauge. In Tray / Box Mode, the back gauge will then be treated like thework piece side wall as described above. In this case, both front and rear sections are muted from the top of the back gauge, but the centre section always remains active.
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Once selected, Tray / Box Mode will remain active while the machine is operating. If themachine is idle for ten minutes, the LZS-003-HS will automatically switch back to NormalMode.
Mutepoint
Figure 3-4: Tray / Box Mode operation
3.2.6Field Muted Mode
WARNING: NO PROTECTION IN FIELD MUTED MODE
In Field Muted mode, the optical sensing is deactivated. Although the LZS-003-HS ensures that the machine does not exceed crawl speed in this mode, particular caution must still be exercised.
The LZS-003-HS Operator Panel requires a password to enable the Field Muted mode button. The password should only be available to suitably trained personnel.
Field Muted mode should only be used by suitably trained personnel and onlyin exceptional circumstances (changing tools, maintenance, etc.)
Mutepoint
Mutepoint
In this mode, protection from the laser is muted for the entire stroke of the beam and therefore does not provide protection. The LZS-003-HS however maintains all its other safety functions.For example, it continues to monitor that the closing of the tools occurs at crawl speed andstops the machine if that speed is exceeded.
The Field Muted Mode should only be used in cases where no alternative mode with activated protection exists. It is recommended that the Field Muted Mode only be activated bysupervisory personnel. Field Muted Mode can be locked and password protected.
3.2.7Stop at Mute Point
The auxiliary Mute Stop mode may be engaged to cause the beam to always stop at the mute
point. It is particularly useful when the back gauge is set close to the die causing the rear section of the laser to be interrupted. The rear section of the laser is muted within the area
10.0mm above the material to clear back gauge obstructions.
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When changing the tools the transmitter and receiver can be easily moved clear so that thepunch can be removed from either end of the machine. To realign the transmitter and receivereach is moved quickly back into position. The laser is adjusted to the correct distance from thepunch tip with the aid of an alignment tool. The receiver is simply positioned so that the laser strikes any where in the 40mm window reception area. In most tool changes the receiver doesnot require any adjustment if the punch depth changes by less than 20mm. After the tool change is complete the mute point is then quickly and easily reset during the first stroke.
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The closed-loop design of the LZS-003-HS enables monitoring of the stopping distance of the moving 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 LZS-003-HS surveys the effect of failures of hydraulic valves, failures of electrical components, and failures in the machine controller software in relation to the actions of the parts of the machine that pose risk to the operator.
Figure 3-5: Closed loop design
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LS-CS-M0005-EN LZS-003-HS Operation Manual – DualLaser Version
Prior to operating the LZS-003-HS system, it is necessary to check the laser to punch distance. When the LZS-003-HS system is powered up the laser to punch distance setting of 14mm willbe displayed on the top line of the LCD Operator Panel.
To check the laser to punch distance;
1.Power-uptheLZS-003-HS system and check the laser to punch distance setting on the
LCD Operator Panel. It will be displayed as 14mm.
2.SettheLZS-003-HS to Normal Mode (default start-up mode) and check that the laser is
on.
3. Place the TX Alignment Magnet on the end of the punch with the punch tip aligned with
the 14mm laser to punch mark (
4. Loosen the vertical bracket locking handle and adjust the vertical position of the laser
so that it is positioned inside the window on the TX Alignment Magnet (
Figure 4-1).
Figure 4-2).
Figure 4-1: TX Alignment Magnet (set to 14mm)
Figure 4-2: Vertical bracket locking handle
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When usingTray Mode the front andrear sensors are muted after sensing the work-piece up-stand. The middle sensor remains active and provided it remains unobstructed thestroke can be completed in high speed. The middle sensor must be positioned approximately 1mm behind the centre line of the punch to avoid being obstructed by the up-stand (
Figure 4-3).
Figure 4-3: Receiver middle sensor position
To adjust the receiver position;
1. Place the RX Alignment Magnet on the end of the punch with the punch tip alignedwith the 14mm laser to punch mark (visible on the receiver window.
2. Unlock the slider mechanism screw (A) (
3. Move the front to back slider mechanism of the receiver forward until it reaches thefront limit (
4. Move the front to back slider mechanism of the receiver towards the rear of themachine until the LCD Operator Panel shows the middle sensor as being clear.
5. Lock the slider mechanism screw (A) (
Figure 4-5 & Figure 4-6).
Figure 4-4). A 4mm portion of the laser will be
Figure 4-5).
Figure 4-5).
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LS-CS-M0005-EN LZS-003-HS Operation Manual – DualLaser Version
LASER ALIGNMENT MAGNET
FIT TO RECEIVER END OF PUNCH
14mm
8mm6mm4mm
POSITION LASER INSIDE WINDOW
9mm7mm5mm
Figure 4-4: RX Alignment Magnet (set to 14mm)
A
Figure 4-5: Slider Mechanism Adjustment
Figure 4-6: Middle sensor adjustment
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5.1.1Operator Panel
The instructions in this section refer to various controls on the LZS-003-HS Operator Panel,
which is shown in
Main display
Mute lamp
Figure 5-1:
Operating mode indicator LEDs
"Laser beamclear" indicator LEDs
Figure 5-1: LZS-003-HS Operator Panel Indicator States
The various indicators can have multiple states.
The Mute lamp's states are illustrated throughout this manual as follows:
Off
On
Flashing (slow)
Flashing (fast)
The states of the operating mode and "laser beam clear" indicatorLEDs are illustrated throughout this manual as follows:
Off
On
Flashing
Note:
In all operations, the display text "READY TO BEND" is replaced by the word"BENDING" when the down pedal is pressed and the tool is in motion.
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5.1.2LZS-003-HS Controller
The LZS-003-HS Controller is usually mountedon the side of the press brake. It has a two
digit LED display that also provides important status information on the operation of the LZS-
003-HS. The left-hand digit is referred to as the Secondary Digit and the right-hand digit asthe Primary Digit. The LZS-003-HS Controller is shown in
Figure 5-2:
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Figure 5-2: LZS-003-HS Controller
Note:
Section
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When the LZS-003-HS system is powered-up the controllerwill perform a self test. During theselftestthe LCD Operator Panel will display software version information and the controller will cycle various numbers on the two segment display. After the self testis completethecontrollerdisplay will show 01 and the LCD Operator panel display will scroll the LZS-003-HS systemsoftware version and laser to punch distance setting across the top line of the display.
The laser to punch distance setting will be displayed as 14mm. Check that the laser is aligned 14mm below the punch.
Note:
Refer to Section information regarding alignment and laser to punch settings.
Once the laser to punch distance has been checked press the SET button as indicated on the LCD Operator Panel display. Proceed with the Start-up test.
8 contains detailed information on error codes.
4 or the Transmitter and Receiver Alignment Manual for detailed
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