{"id":1548,"date":"2018-09-07T11:46:09","date_gmt":"2018-09-07T09:46:09","guid":{"rendered":"http:\/\/dev.hhb.eu\/?page_id=1548"},"modified":"2025-03-14T09:24:18","modified_gmt":"2025-03-14T08:24:18","slug":"machine-safety-stop-time-measurement","status":"publish","type":"page","link":"https:\/\/hhb.eu\/en\/machine-safety-stop-time-measurement\/","title":{"rendered":"Machine Safety and Stop Time Measurement"},"content":{"rendered":"

Machine Safety and Stop Time Measurement<\/h1>\n

Machine safety ensures that the operator cannot reach the danger point before the machine has been stopped via the protective device.<\/h3>\n
\n

The European machinery directive (EU machinery directive 2006\/42\/EC<\/a>) specifies the general requirements for safety on machines in the<\/span> entire European Economic Area.<\/span> The European Use of Work Equipment Directive 2009\/104\/EC <\/a><\/span>defines<\/span> the minimum health and safety requirements for the use of work equipment by workers at work.<\/span><\/p>\n

European standards define moreover concrete requirements for protective devices and the application of <\/span>protective devices on machines.<\/span><\/p>\n

Protective devices such as light curtains, opt<\/span>ical<\/span> access guarding systems, laser scanners and two-hand controls allows a more or less unrestricted access to the danger<\/span> point<\/span>. In this case<\/span>,<\/span> it must be ensured that the <\/span>operator<\/span> can<\/span>not reach the danger point before the machine has been sto<\/span>pped via the protective device.<\/span> This is <\/span>done<\/span> by keeping a certain safety distance between the protective device and the nearest <\/span>danger<\/span> point. This safety distance is calculated <\/span>based on<\/span> the machine stopping performance, the response time of the protective device, the additional distance (penetration depth factor) <\/span>and the assumed approach speed.<\/span> The EN ISO 13855 and ANSI B11.19 as <\/span>worldwide<\/span> valid standards define the formulas for <\/span>the <\/span>calculation of <\/span>safety distance<\/span>s<\/span>.<\/span><\/p>\n<\/div>\n

The Principle of Stop Time Measurement<\/h2>\n
\n

The stopping time is a key factor for machines with dangerous motions when selecting and positioning the protective device. The stopping time essentially determines the safety distance between protective device and danger point. This guarantees that the operator cannot reach the nearest danger point before the standstill.<\/p>\n

The time measure meter safetyman\u00ae<\/sup>\u00a0DT3 is used to determine the stopping time and stopping distance.<\/p>\n<\/div>\n

\"\"<\/p>\n

The Actuator<\/h3>\n
\n

\u2026 triggers a machine stop at a pre-adjusted position (usually at the highest velocity) simulating the response of the protective device. The Relay Unit or the Auto-Hand can be used as actuators. The relay output is usually connected between the output of the protective device and the machine control. The Auto-Hand triggers the protective device directly. Thus, an electrical connection to the machine control is no longer necessary. In addition, the overall stopping time is evaluated.<\/p>\n<\/div>\n

\"\"<\/p>\n

The Sensor<\/h3>\n
\n

\u2026 constantly measures the position and velocity of the movable machine part. The sensor for linear motions is generally a cable transducer and for rotating motions a wheel encoder.<\/p>\n<\/div>\n

\"\"<\/p>\n

The Measuring Device<\/h3>\n
\n

\u2026 determines \u2013 via the sensor\u2019s information \u2013 the stopping time and the stopping distance of the machine between the stopping signal and the machine\u2019s standstill. The safety distance between the protective device and the danger point is calculated. All data of the protective device is taken into account and the valid European standards are considered. Multiple automatic measurements with statistical evaluation increase the precision. All measured values are documented with the aid of the printer or can be transferred to a computer system.<\/p>\n<\/div>\n

\"\"<\/p>\n


\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Machine Safety and Stop Time Measurement Machine safety ensures that the operator cannot reach the danger point before the machine has been stopped via the protective device. The European machinery directive (EU machinery directive 2006\/42\/EC) specifies the general requirements for safety on machines in the entire European Economic Area. The European Use of Work Equipment […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1548","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/pages\/1548","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/comments?post=1548"}],"version-history":[{"count":22,"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/pages\/1548\/revisions"}],"predecessor-version":[{"id":21082,"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/pages\/1548\/revisions\/21082"}],"wp:attachment":[{"href":"https:\/\/hhb.eu\/en\/wp-json\/wp\/v2\/media?parent=1548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}