Emergency Stop Considerations - JVL MAC050 User Manual

6.7

Emergency stop considerations

6.7.1 Emergency stop
Fundamental considerations regarding the safety of machines:
In the construction of machines there are several basic requirements that a machine
manufacturer or producer must fulfil. It is the machine manufacturer's responsibility
to ensure that applicable regulations are fulfilled.
The following presents a broad overview of the applicable regulations in Europe (the
EEC). If a machine manufacturer markets its products in other countries, it is the manu-
facturer's responsibility to ensure compliance with local national regulations.
It cannot therefore be assumed that a machine that is produced in accordance with Eu-
ropean requirements will automatically also comply with regulations that are applicable
in other markets, even though these are acknowledged in several countries.
The most important European regulation in this context is the Machinery Directive,
which in Denmark is implemented via the Danish Working Environment Authority's
Executive Order no. 561.
This Executive Order prescribes requirements to ensure that machines are safe, that
a technical dossier including a health and safety risk analysis is prepared, and that the
machine is supplied together with instructions for use a EC declaration of conformity and
furthermore that the machine is CE marked.
The Essential Health and Safety Requirements are specified in the Directive's appendix 1.
To ensure compliance with these requirements, it is advantageous to use various stand-
ards which are described later.
Overall, the most important requirement is to fulfil the Machinery Directive's require-
ments regarding safety integration, which in brief can be described as follows:
- 1.st. priority: the machine's construction must ensure that is it not dangerous.
Example:
The machine construction is such that it is not possible to come into contact with rotating
parts of other potentially dangerous components, either during operation, set-up or
maintenance.
- 2nd priority: in cases where it is not always possible to achieve a construction that
does not present a potential hazard, additional protective measures must be incor-
porated to eliminate risk.
Example:
No direct access to rotating or other potentially hazardous parts and components is pos-
sible without the removal of a screen, guard, protective cover or other means of protec-
tion.
- 3rd priority: to the extent where a machine construction and the built-in safety
measures still leave some potential risk, clear warnings of hazard must be given using
signs on the machine itself, and by information in the operation manual and by train-
ing if necessary.
It is the risk evaluation of the machine that determines what is necessary to fulfil the es-
sential health and safety requirements of the Machinery Directive and thus also which
protective measures are required.
It is also the risk assessment that determines whether an emergency stop function is re-
quired.
384 JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500