OPTIMUM
M A S C H I N E N - G E R M A N Y
Safety
Version 1.1.6 dated 2014-10-16
Page 18
Original operating instructions
F150
GB
WARNING!
When chipping magnesia materials (aluminium-/magnesium alloys) spontaneously
inflammable or explosive particles (powder, dust, chips) might be generated which might
result in a fire and/or an explosion (deflagration).
Magnesium is designated as a dangerous material in the list of dangerous materials and
preparations according to §4a of Ordinance of Hazardous Substances.
In case of a fire with magnesium only use appropriate and admitted extinguishing
agents. Never extinguish using water. If you extinguish burning magnesium with water it
might lead to dangerous reactions (detonating gas). Water would be decomposed in its
components hydrogen (H) and oxygen (O).
Only the following extinguishing agents are admitted:
solid extinguishing agent of the fire class D (fires of metals)
dry covering salts for magnesium
a mixture of sand and cast chips
argon (Ar) or nitrogen (N
2
)
If fine mist and smoke is generated in the working room, suction unites need to provided
in order to avoid the accumulation of ignitable mixtures and emissions.
We provide information about the specific dangers when working with and on the CNC machine
in the descriptions for these types of work.
1.12
Safety during maintenance
Inform the operators in good time about any maintenance and repair works.
Report all safety relevant changes and performance details of the multifunctional CNCma-
chine. Document all changes, have the operating instructions updated accordingly and train
machine operators.
1.13
Disconnecting and securing the CNC machine
Turn off the main switch of the CNC machine before starting any maintenance or repair work.
Use a padlock to prevent the switch from being turned on without authorization and keep the
key in a safe place.
All machine parts as well as all dangerous voltages are switched off.
Only the positions which are marked with the pictogram on the side constitute an exception.
These positions may be live even if the main switch is switched off.
Attach a warning sign on the CNCmachine.
Img.1-4:
Warning sign
WARNING!
Live parts and machine part movements can lead to severe injury to you or others!
Proceed with extreme care if you cannot switch off
the CNC machine by turning off the main switch due to required works (e.g. functional
control).
