Printer 800 Safety Features.pdf - 第8页

SAFETY FEA TURES PRINTHEAD COVER 2.8 Installatio n Manu al Chapter I ssue 1 Jul 03 PRINTHEAD COVER Raising the print head cover allows access to the following areas: • Printhead • Squeegee/ProFl ow • S tencil/Screen • Un…

SAFETY FEATURES

EMERGENCY SHUTDOWN

Chapter Issue 1 Jul 03 Installation Manual 2.7

E Stop Module

Shut Down

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

cover, 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 Motor

• 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)

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 press the system button when prompted.

SAFETY FEATURES

PRINTHEAD COVER

2.8 Installation Manual Chapter Issue 1 Jul 03

PRINTHEAD COVER

Raising the printhead cover allows access to the following areas:

• Printhead

• Squeegee/ProFlow

• Stencil/Screen

• Under Screen Cleaner

•Tooling

The printhead cover is accessible to the operator and is supported, in the open

position, by two gas struts and springs. A cam 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

machine modules.

The printhead cover has an additional safety feature. A pneumatically operated

lid bolt prevents the cover being raised during the print cycle. The lid bolt is

withdrawn and the cover may be raised:

• On completion of a cycle in single and step mode

• When pause, stop or end is selected in auto mode

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

MACHINE COVERS

Chapter Issue 1 Jul 03 Installation Manual 2.9

MACHINE COVERS

In order to protect personnel and prevent damage to the machine, eight panels

are fitted around the base of the machine.

• Front Panel

• Rear Panel

• Corner Panels (4 positions)

• Side Panels (2 positions)

The upper part of the machine is protected by the opening printhead cover, one

rear fixed printhead cover and two upper side panels which house the control

switches.

Figure 2-3 Machine Panels

NOTE

Some of the covers can only be removed in a specific order due to the covers

interlocking with each other.

Item Description Item Description

1 Right Hand Upper Side Panel 6 Side Panel (in 2 positions)

2 Printhead Cover 7 Rear Corner Panel (in 2 positions)

3 Right Hand Front Corner Panel 8 Safety Cover (in 2 positions)

4 Front Panel 9 Rear Printhead Cover (fixed)

5 Left Hand Front Corner Panel 10 Left Hand Upper Side Panel