Machinery Safety 101

Testing Emergency Stop Systems

This entry is part 11 of 16 in the series Emer­gency Stop

I’ve had a num­ber of ques­tions from read­ers regard­ing test­ing of emer­gency stop sys­tems, and par­tic­u­larly with the fre­quency of test­ing. I addressed the types of tests that might be needed in…

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Why should you get involved in Standards Development?

It’s now been more than 30 years since I first learned about stand­ards, in the form of the Ontario Elec­tric­al Code. I was study­ing elec­tri­city and elec­tron­ics in high school, and Steve Struk,…

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Risk Assessment Blunders

Updated 7‑Jul-2014 Recently I read a blog post writ­ten by Dav­id Cant, called, “Are You Mak­ing These Risk Assess­ment Blun­ders?”. Writ­ing in the UK, Mr. Cant spoke to some of the com­mon kinds…

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Translation Bafflement

I’ve been noti­cing a trend with some of my cli­ents that I am hav­ing a really hard time under­stand­ing – maybe a read­er can help me get this… A basic require­ment in the EU

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Get the Basics Right!

For more than 15 years I’ve been teach­ing people about risk assess­ment, machinery safety and CE Mark­ing of machinery in private, onsite classes and through present­a­tions at safety con­fer­ences. Things are…

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Interlocking Devices: The Good, The Bad and the Ugly

This entry is part 1 of 7 in the series Guards and Guard­ing

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…

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How to become Instantly Incompetent

Many engin­eers and design­ers fall into a really simple trap, one that makes them instantly incom­pet­ent. These are not stu­pid people. They have the qual­i­fic­a­tions, so what is it that can catch someone out…

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31-Dec-2011 – Are YOU ready?

This entry is part 8 of 8 in the series Cir­cuit Archi­tec­tures Explored

31-Decem­ber-2011 marks a key mile­stone for machine build­ers mar­ket­ing their products in the European Uni­on, the EEA and many of the Can­did­ate States. Func­tion­al Safety takes a pos­it­ive step for­ward with the…

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Why I wear a Poppy on 11-Nov

In a recent art­icle in the Inde­pend­ent, Robert Fisk writes that the poppy has become noth­ing more than a fash­ion state­ment in the UK. Merely a way to show that you are Brit­ish,…

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Inconsistencies in ISO 13849 – 1:2006

This entry is part 7 of 8 in the series Cir­cuit Archi­tec­tures Explored

I’ve writ­ten quite a bit recently on the top­ic of cir­cuit archi­tec­tures under ISO 13849 – 1, and one of my read­ers noticed an incon­sist­ency between the text of the stand­ard and Fig­ure 5,…

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