I recently heard about an application question related to a light curtain where a small gap existed at the top of the sensing field, between the last beam in the field and the surrounding structure of the machine. There was some concern raised about the gap, and whether or not additional guarding might be needed to close the gap.…Read More
Note: A shorter version of this article was published in the May-2012 edition of Manufacturing Automation Magazine. When designing safeguarding systems for machines, one of the basic building blocks is the movable guard. Movable guards can be doors, panels, gates or other physical barriers that can be opened without using tools. Every one of these guards…Read More
Special Co-Author, Tom Doyle Last week we saw the Boston Bruins earn the Stanley Cup. I was rooting for the green, blue and white, and the ruin of my voice on Thursday was ample evidence that no amount of cheering helped. While I was watching the game with friends and colleagues, I realized that Roberto Luongo and Tim…
If you are building machinery that will be CE marked or is subject to the EU Machinery Directive, you need to read this article at MachineBuilding.net This article reviews some of the retained fastenings that are available for use on fixed machine guards, as required by the new Machinery Directive 2006/42/EC and the guarding standard…Read More
(Eds. note: This article was originally written in 2011 and was updated in Nov. 2018.) The “Hierarchy of Controls” is one approach to risk reduction that has become entrenched in the Occupational Health and Safety (OHS) sector. There are other approaches to risk reduction which are equally effective but are less rigidly structured. If you…Read More
Can emergency stop devices that a prone to unintended operation be guarded? Find out!Read More
Did you know that interlocked gates require stopping performance testing?
Machinery needs to be able to stop in the time it takes a person to open the guard and reach the hazard. If the distance from the guard opening to the hazard is short enough that a person can reach the danger point before the hazard can be controlled, the guard is useless. The resulting situation may be worseRead More