Printer 710_810 v8 Safety Features.pdf - 第10页

SAFETY FEA TURES PRINTHEAD COVER/SHUTTER 2.10 Technical Reference Manual Chapter Issue 6 O ct 06 PRINTHEAD COVER/SHUTTER Raising the print head cover/shutter allo ws access to the following areas : • Printhead • Paste Di…

SAFETY FEATURES

GENERAL

Chapter Issue 6 Oct 06 Technical Reference Manual 2.9

E Stop Module Shut

Down

If the E Stop loop is opened by pressing the E Stop or opening the printhead

cover(s)/shutter, an emergency stop is initiated via the E Stop module. When

actuated the following areas of the machine are rendered inactive:

•Lid Bolt

• Moving Rail Stepper

• Print Carriage Servo (axis stopped before power is removed)

• Paste Cartridge Tilt Up/Tilt Down Pneumatic Actuator

• Paste Dispense Solenoid and Stepper Motor

• Rail System Front and Rear Belt Motor Drives

• Rising Table Brake (brake engages when power is cut)

• Rising Table Servo

• Squeegee/ProFlow Stepper Motor(s)

•System Lamp

• Underscreen Cleaner Paper Feed Motor

• Underscreen Cleaner Solvent Pump

• Underscreen Cleaner Squeegee Solenoid

• Vacuum Tooling Solenoid

• X Camera Motor (axis stopped before power is removed)

• X Forward, X Rear and Y Chase Alignment Stepper Motors

• Y Camera Motor (axis stopped before power is removed)

Apart from the metal covers machines, the safety circuits have been designed

to conform to EN954 Category 2 and checks for welded contacts before

resetting. Additional safety is achieved by duplication of the power contactors

to provide redundancy.

Recovery When normal working conditions are restored, release the emergency stop

button and, when prompted by a screen message, press the System button.

SAFETY FEATURES

PRINTHEAD COVER/SHUTTER

2.10 Technical Reference Manual Chapter Issue 6 Oct 06

PRINTHEAD COVER/SHUTTER

Raising the printhead cover/shutter allows access to the following areas:

• Printhead

• Paste Dispenser

• Squeegee/ProFlow

• Stencil/Screen

• Under Screen Cleaner

•Tooling

The printhead cover(s)/shutter is accessible to the operator and a cam interlock

safety switch protects personnel from the mechanisms during normal line

operations. Lifting the cover(s)/shutter cuts power to all motors and selected

actuators, via the E Stop module, to all machine modules.

Pneumatically operated lid bolt(s) prevents the cover/shutter being raised

during the print cycle. The lid bolt(s) is withdrawn and the cover/shutter may be

raised:

• On completion of a cycle in single and step mode

• When pause or stop is selected in auto mode

• When the E Stop is pressed

Recovery When the printhead cover(s)/shutter 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 6 Oct 06 Technical Reference Manual 2.11

HIGH VOLTAGE PROTECTION

Access Where incoming supply voltages are present, protection is afforded by control-

ling access to the enclosures that house the supply. The machine 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 danger-

ous voltage (100V-240V) terminations are present within.

Earth Bonding Apart from metal covers machines, all external metal surfaces are mechanically

and electrically bonded to the machine 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.