HS50_advance_level 2 - 第23页
Stud ent Gu ide HS-5 0 Adva nced II 07/2 002 Ed ition 1 Saf ety Co nsider atio n 9 6DIHW \ LQVWUXFWLRQV IRUFKDQJL QJWKH FRPSRQHQWW DEOH W ARNING Never reac h into the g aps between the c ompon ent ch angeover…
07/2002 Edition Student Guide HS-50 Advanced II
1 Safety Consideration
8
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To prevent all risk of injury when closing the protective covers on the machine, all personnel must
be required to follow the instructions below when closing the covers.
RISK OF INJURY HANDS IF THE PROTECTIVE COVERS ARE NOT CLOSED
CORRECTLY
(1)Protective covers
(2)Recessed grips
➠ When opening or closing the protective covers, always hold the covers by the recessed grips.
If the shock absorbing capacity of the protective covers reduces over time, for example, your
hands can easily be crushed if you do not close the covers using the recessed grips.
Student Guide HS-50 Advanced II 07/2002 Edition
1 Safety Consideration
9
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WARNING Never reach into the gaps between the component changeover table and
the placement system frame while the machine is running (item 1 in Fig. 1.1 - 2).
WARNING Always check that the component table is docked on the placement sys-
tem before connecting or disconnecting the power cable for the component changeover table at
the socket on the placement system (item 2 in Fig. 1.1 - 2).
WARNING NEVER connect the connecting cable for the component table to the
socket on the placement system and then operate the component table outside the machine via
the compressed air control unit (item 3 in Fig. 1.1 - 2).
07/2002 Edition Student Guide HS-50 Advanced II
1 Safety Consideration
10
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Almost all of the modules in use today are equipped with highly integrated MOS blocks and com-
ponents. The manufacturing techniques used mean that these electronic components are ex-
tremely sensitive to overvoltage and thus to electrostatic discharge.
The abbreviation for such modules is ’ESD’(Electrostatic Sensitive Device). This is used interna-
tionally, although the German abbreviation ’EGB’ may also be seen.
The following symbol on cabinet rating plates, racks or packaging indicates that components
which are sensitive to electrostatic discharge have been used and thus that the modules con-
cerned are also touch-sensitive.
ESDs can be destroyed by voltages and power levels that are far below the level
that can be perceived by humans. Such voltages occur if a person touches a com-
ponent or module without grounding themselves. Components that are exposed
to such overvolt-ages do not generally appear to be defective immediately - incor-
rect behavior starts after the component or module has been in operation for some time.
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➠ Most plastics can easily become charged and must therefore be kept away from at-risk com-
ponents.
➠ Always ensure that people, the workplace and packaging are safely grounded when handling
electrostatic sensitive components.
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Do not touch electronic modules unless it is absolutely essential to do so in order to carry out other
work. If it is necessary, make sure that you do not touch the pins or printed conductors when you
pick up flat modules.
Do not touch components unless
➠ you are constantly grounded by an ESD wrist strap or
➠ you are wearing ESD shoes or ESD shoe grounding strips on an ESD floor.
Always discharge yourself before you touch an electronic module. To do this, simply touch a con-
ductive and grounded object immediately before you touch the module (such as unpainted parts
of a switch cabinet, a water pipe, etc.).
Do not allow modules with chargeable and highly insulating materials to touch one another, e.g.
plastic films, insulating table surfaces or items of clothing made from synthetic fibers.