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LazerSafe continuously monitors the speed and stopping distance of the moving member of the machine. If the crawl speed of 10 mm/sec. is exceeded and/or the stopping distance of 13 mm is exceeded, LazerSafe will issue a stop command to the machine. There is no need for a separate stopping performance monitor.
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| LazerSafe is a machine safeguarding system for hydraulic press brakes that provides the most effective solution for operator safety and machine productivity combined. The transmitter and receiver are mounted on the ram of the press allowing the operator to stay close to the workpiece as the tools close at high speed. |
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Hydraulic Press Brake Guarding
featured products
LazerSafe real-time monitoring system
LazerSafe is the only press brake safety system that performs failure detection by real-time monitoring of the process under control. Lazersafe utilizes a closed-loop design to monitor the speed, positions, direction, and stopping distance of the ram. In addition to providing an unprecedented degree of hydraulic press brake safety, hydraulic, electrical and machine controller software logic faults may also be detected.
LazerSafe is Ideal Solution for Maximizing Operator Safety.
The productivity of a press brake is determined by the cycle time to complete a stroke which determines the number of bends per hour or productivity rate of the machine. LazerSafe from STI is designed to provide a minimum impact on productivity while providing maximum operator safety protection.
The productivity of a press brake is determined by the cycle time to complete a stroke which determines the number of bends per hour or productivity rate of the machine. Short cycle times require maximum fast speed operation thereby minimizing slow speed operation.
Cycle time is dependent upon some key factors:
- Descent speed of the ram — generally the ram approaches at 4 in/sec although in some high speed systems this reaches 8 in/sec;
- Back-up speed of ram — under hydraulic pressure the ram returns to the beginning of the stroke height at around 2 in/sec and up to 4 in/sec on some very fast machines;
- Back-up height — the height above the tool at which a stroke cycle commences, this is determined by the need to have sufficient working opening for the material including any flange involved;
- Mute point setting — the position where the suspension of the safety function is initiated by safety related parts of the control system during otherwise safe conditions in the operation of the machine and where slow bending speed is required;
- Controller functionality — given job parameters it will control the operation of the press brake determining the opening height, depth of travel into the tool (bending angle) and the change of speed point from fast to slow operation;
- Safety guarding system
employed — while primarily used to provide operator safety a guarding system that is productivity based will have little to no impact on the productivity of the machine, without impacting on its safety role, allowing the machine to operate at fast speed while allowing the operator good safe working access to the machine.
SAFETY GUARDING
The STI LazerSafe is designed to provide minimum impact on productivity while at the same time providing maximum operator safety protection. Some particular measures over and above stopping the press brake when an obstruction is detected are:
- Stopping distance monitoring — on every stroke the stopping distance is monitored to ensure that the press brake can stop as required. If this were not monitored then it could be possible for the press brake to overrun and impact on operator safety even though the safety system had initiated a stop.
- Speed monitoring — on every stroke to ensure that the change of speed occurs as required. Again should the change occur too late or not at all operator safety would be impacted.
- Rear beam protection — safety standard EN 12622 requires that approaches to the rear of the tool be protected. The rear section of the Lazer-Safe beam provides this protection and, therefore, segmented tools or tools that do not reach the extremity of the bed of the machine can safely be used. In these circumstances the operators can, through the gaps between or around the tools, reach the rear of the tools.
"New LCD menu-driven operator interface panel with magnetic base provides for easy menu-driven programming, fast and easy setup, real-time operational mode status, password protection for supervisory control, and protective field status."
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UL listed based on the requirements of ANSI/UL61496 and UL508
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Listed for use in compliance with NFPA79-2002, Clause 11.3.4
- Complex bends achieved with “Tray/Box” and “Field Muted” modes of operation
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Controls the point of operation through closed-loop monitoring of speed, direction, position and stopping distance of the ram
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Dual flat bands of continuous laser light detect obstructions as small as 4 mm while still being vibration tolerant
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Comprehensive operator protection at close proximity to the point of operation
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Mute point automatically determined, easily set and continuously monitored
- Rear section of laser bands easily muted to ignore back gauge in “up-close” setups
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Failure detection performed by real-time monitoring of the process under control
- LazerSafe is within “Class I Laser Product” limits as defined in IEC 60825
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TUV registered number 08/205/B1-PM01700
- Allows tools to close at high speed, increasing productivity
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