Printer 710_810 v8 Safety Features.pdf - 第8页
SAFETY FEA TURES GENER AL 2.8 Technical Reference Manual Chapter Issue 6 Oct 06 T wo Button Control Switches The two button contr ol switches or jog switches are posi tioned such as to maint ain maximum safet y for the o…
SAFETY FEATURES
GENERAL
Chapter Issue 6 Oct 06 Technical Reference Manual 2.7
Figure 2-4 Metal Covers Design
Lid Bolt A lid bolt is fitted to all machines to prevent the front printhead cover/shutter
from being raised during the print cycle. The gull wing cover machine has an
extra lid bolt fitted to prevent the rear printhead cover from being raised.
The lid bolt is withdrawn and the printhead cover/shutter may be raised:
• When Open Cover is requested by software
• On completion of a cycle in single step mode
• When pause or stop is selected in auto mode
• When the E Stop is pressed
Left Jog Button
E Stop
Right Jog Button
System Button
View on Front of Machine
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.