Machinery Safety 101

EU Machinery Directive Public Review

Rule books stacked up on a table in a library.

If you ship machinery products to the EU the Machinery Dir­ect­ive affects you. You have a chance to con­trib­ute to the review of this doc­u­ment.

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Force and injury — How hard is too hard? ISO 21260 will help

ISO/TS 15066 body model
This entry is part 5 of 5 in the series Hier­archy of Con­trols

Force rep­res­ents the mech­an­ic­al energy that causes injury to the human body. ISO/TC 199 has been work­ing on answer­ing that ques­tion since 2012.

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Instructions for Use – the New ISO 20607

Instruc­tions are one of the basic items that users expect to get when they pur­chase a product, and yet these import­ant doc­u­ments are often poorly writ­ten, badly trans­lated, and incom­plete. Key product fea­tures are badly described, and inform­a­tion on fea­tures, set­tings and haz­ards may be absent. All of this des­pite the fact that the min­im­um require­ments…

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More E‑Stop Questions

This entry is part 17 of 16 in the series Emer­gency Stop

Here are some more ques­tions I’ve been asked regard­ing emer­gency stop require­ments. These ones came to me through the IEEE PSES EMC-PSTC Product Com­pli­ance For­um mail­ing list. Primary Sources There are three primary sources for the require­ments for emer­gency stop devices: [1] Safety of machinery — Emer­gency stop — Prin­ciples for design, 3rd Edi­tion. ISO 13850. 2015. [2] Safety of…

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Can Emergency Stop be used as an “on/off” control?

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

Every couple of months I get an email ask­ing me if there is any reas­on why e‑stop func­tions can­’t be used as the primary power con­trol (on/off but­ton) for machinery. Fol­low­ing a recent exchange, I thought I would share the reas­ons for why this is such a bad idea. The short answer The short answer is an unequi­voc­al NO. Don’t…

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Introduction to Functional Safety Seminars

Man training a group of people, pointing to Functional Safety topics on the whiteboard

If you are inter­ested in func­tion­al safety, and I know many read­ers are based on the stat­ist­ics I see for my oth­er func­tion­al safety-related posts, I think you will be inter­ested in this. I am col­lab­or­at­ing with the IEEE Product Safety Engin­eer­ing Soci­ety’s Vir­tu­al Chapter to provide a series of three 35 minute sem­inars dis­cuss­ing the fun­da­ment­als of func­tion­al safety. The…

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1,000,000

1 Million Views!

1,000,000 views! Today marks a fant­ast­ic mile­stone for the Machinery Safety 101 blog – 1,000,000 views! When I star­ted writ­ing this blog back in Octo­ber 2008, I had high hopes that a few dozens, or per­haps as many as 1 000 people would find my art­icles inter­est­ing enough to spend some time read­ing. Nev­er in my wild­est ima­gin­ings did I think…

Do-It-Yourself Safety Labels, Signs and Tags

Safety label on a roller conveyor
This entry is part 1 of 5 in the series Hier­archy of Con­trols

One of the great chal­lenges that all product design­ers face is the sourcing of appro­pri­ate product safety labels. There are many sources for off-the-shelf labels includ­ing some of the biggest names in mark­ing and labelling, but until now, none have offered a way for product man­u­fac­tur­ers to devel­op stand­ards-com­pli­ant haz­ard warn­ing signs and labels them­selves. If…

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Emergency Stop Pull-Cords

This entry is part 15 of 16 in the series Emer­gency Stop

This art­icle was updated 2019-04-26, adding spe­cif­ic details related to IEC 60947 – 5‑5. When it comes to emer­gency stop devices there is no doubt that the red mush­­room-head push but­ton is the most com­mon – they seem to be every­where. The second most com­mon emer­gency stop device is the pull-cord, and like the light-cur­­tain in safe­guard­ing…

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5 Things You Need to Know About ANSI

Have you ever wondered about ANSI? Needed to know how ANSI stand­ards are developed? Find your answers and more in this post!

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