192277 - Micron Technical Reference V9 Volume 1.pdf - 第43页
SAFETY FEATURES HIGH VOLTAGE PROTECTION Chapter Issue 15, Nov 18 Technical Reference Manual 2 .17 HIGH VOL T AGE PROTECTION Access Where incoming supply voltages are present, pro tection is af for ded by controlling acce…
SAFETY FEATURES
PRINTHEAD COVER
2.16 Technical Reference Manual Chapter Issue 15, Nov 18
PRINTHEAD COVER
Safety Interlocks The safety features designed into the printer are for the protection of all
operators and maintenance personnel. ASM strongly recommend safety
devices are never overridden.
Opening the printhead cover allows access to the following areas:
• Printhead
• Paste Dispenser
• Squeegee/ProFlow
• Stencil/Screen
• Under Screen Cleaner
• Tooling
The printhead cover is accessible to the operator and an interlock safety switch
protects personnel from the mechanisms during normal line operations. Lifting
the cover cuts power to all motors and selected actuators, via the E Stop
module, to all printer modules.
Full details of the device types fitted can be found in the covers chapter of this
manual.
NOTE
The pass through lane belt motors on the dual lane printer continue running
when the printhead cover is open but stop when the E Stop is pressed.
Pneumatically operated lid bolt(s) prevents the cover being raised during the
print cycle. The lid bolt is withdrawn and the cover may be raised:
• When Open Cover is requested by software
• When pause or stop is selected during a print cycle
• When the E Stop is pressed
Recovery When the printhead cover is closed, normal working condition is restored and
the line may be restarted. Pressing the system button enables resumption of
operations, where this is allowed by the control system.
SAFETY FEATURES
HIGH VOLTAGE PROTECTION
Chapter Issue 15, Nov 18 Technical Reference Manual 2.17
HIGH VOLTAGE PROTECTION
Access Where incoming supply voltages are present, protection is afforded by
controlling access to the enclosures that house the supply. The printer is fitted
with a mains isolator switch that cuts power to all circuits located beyond the
switch.
Hazard Warning
Labels
Hazard warning labels are placed on the outside of enclosures where
dangerous voltage (100V-240Va.c 50-60Hz) terminations are present within.
SAFETY FEATURES
HIGH VOLTAGE PROTECTION
2.18 Technical Reference Manual Chapter Issue 15, Nov 18
Earth Bonding All external metal surfaces are mechanically and electrically bonded to the
printer’s protected earth point. The bonding wire used is identified by its green
and yellow insulation and is commonly used to earth bond throughout. Care
should be taken when removing these links that when they are replaced they
are secured tightly and cleanly.
Printer Protected Earth Point
1 PSU M37 Module Earth Bond Stud 4 Printer Protective Earth Chassis Stud
2 Earth Busbar 5 Earth Busbar Connected to Printer
Frame
3 Printer Bonding Earth Chassis Stud 6 Printer Earth Connections
Printer Protected Earth Stud and Earth Busbar
Earth Point and Labels - RHS of Printer Chassis