The effective sensing field of the device shall be located at a distance from the nearest recognized hazards such that the operator or others cannot reach the hazard with a hand or other body part before cessation of motion during the hazardous portion of the machine cycle. The point at which a device responds to an intrusion may vary. The devices should be located or adjusted such that the device always responds to the intrusion at or prior to the safety distance. Care should be exercised when installing the device to ensure that it does not detect false signals from other devices in the area. Usually the electro-optical presence-sensing device is used in a manner that provides a protected zone in front of the primary work area with auxiliary devices or guards used to protect secondary access areas. In some cases, however, mirrors may be used in conjunction with the device to provide 2-, 3-, or 4-sided protection.
Safety Distance Calculation Made Easy
How to Calculate Safety Distance for Safety Light Curtains - SICK Inc
When safeguarding your machinery, it is not enough to simply install a light curtain s and assume that the machine is now safe. This post explains how to calculate safety distance for light curtains. Then, once installed, use a stop time measurement STM device to calculate how quickly the machine stops, and use this value to determine the minimum safety distance required. Taking the time to calculate safety distances upfront not only ensures compliance with global safety regulations, but also helps prevent long term costs of injury and machine downtime.
How to Calculate Safe Distances
When attempting to safeguard a piece of automation equipment using electrical safeguarding devices such as light curtains, area scanners and safety mats, careful consideration must be taken to ensure they are not just placed in an arbitrary location that is convenient to install or mount. Many factors must be considered when performing a safety distance calculation. As machinery and processes continue to become faster and more complex the need to be aware of, and continue to strive for improved safety measures has never been more at the forefront of electrical control system design then it is today. Due to this ever growing trend, the industry in turn has evolved to keep pace by marketing products and protective devices that aim to put the safety and well-being of the people or persons operating machinery at the forefront of the design process. In this article we will examine two protective devices, namely, light curtains and safety mats and perform example safety distance calculations as outlined in the American National Standards Institute, ANSI B
Most industrial equipment requires human interaction to function. Workers must be protected from dangerous interactions with machines. Calculating the minimum safe mounting distance is vital to ensure worker safety.