Printer 710_810 v8 Safety Features.pdf - 第9页

SAFETY FE ATURES GENE RAL Chapter Issue 6 Oct 06 Technical Reference Manual 2.9 E S t op Module Shut Down If the E S top loop is opened by pr essing the E S top or opening t he printhead cover(s) /shutter , an emergency …

SAFETY FEATURES

GENERAL

2.8 Technical Reference Manual Chapter Issue 6 Oct 06

Two Button

Control Switches

The two button control switches or jog switches are positioned such as to

maintain maximum safety for the operator whilst solvent priming or paper

feeding with the printhead cover/shutter open. This requires both buttons to be

depressed simultaneously for the function to become active. The use of these

buttons is dependent on the function selected on the machine monitor. During

normal operation these buttons control paper feed and solvent prime opera-

tions. When in maintenance mode, the two button control switches control the

following diagnostics:

• Print Carriage

• Squeegee Assembly

• Camera Axes

• Rail System

• Screen Alignment

• Rising Table

• ProFlow

Only one button is required to drive the selected mechanism, the two buttons

are used to drive the mechanism in opposite directions, ie jog forward or jog

back.

Emergency

Shutdown

The machine is fitted with an emergency stop push button control switch (E

Stop). The E Stop switch, once pressed, is a latching switch and requires

resetting.

To reset the E Stop, turn the button clockwise until it unlatches.

Pressing the E Stop or raising the printhead cover/shutter cuts the servo axes

power supply. A warning of this condition is reported on the machine monitor.

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.