Interlock Safety System - Oce Arizona 200 GT User Manual

Interlock Safety System

Interlock Safety System
Introduction
The Arizona 200/250 GT printer has an integrated safety interlock system that stops
all machine motion when a situation that might compromise operator safety occurs.
The printer has three Emergency-Stop buttons: one on each end of the gantry, and
one on the Control Station podium. Activating an Emergency-Stop button will
switch the Safety Monitoring Relay input circuits. This causes the system to isolate
the power to the motion control motors, and also turns off the Arizona 200/250 GT
curing system (UV lamps). The Maintenance Station and the Safety Gate on the
carriage also have an interlock function. Beacons lights indicate the status of the
safety system as explained in this section.
How the Interlock System Works
All system Interlock circuits operate as one. This means that any open interlock
switch and/or Emergency Stop switch kills motion ability in all system electronics.
Drive(s) needed for media loading purposes are exempt from this requirement. Both
System PCB's contain the same Safety Interlock Circuit that functions as a single
unit. However, an over-current condition in the Drive circuit on one PCB can disable
itself without the knowledge/action of the other PCB's.
Emergency Stop Function:
There are three Emergency Stop buttons, one is located at the Operator Control
Station, and one at each end of the Gantry. The fourth Emergency Stop is the AC
power Supply Disconnect. Motion Motors that are disabled include the Gantry
Drive, Carriage Drive, Z-Axis Drive (Carriage up and down movement), all Ink and
Maintenance Pumps, Heaters, Table Vacuum Pump, and UV Lamps (not UV
Cooling Fans).
Upon release (reset) of an Emergency Stop, no motion may be initiated without
acknowledgment of the Operator, i.e. User interface message on the LCD display
with Operator intervention acknowledgment. To re-activate the printer after you
press an Emergency Stop button, turn the button counter-clockwise. If the printer has
encountered an error, you must correct that error first. Errors are displayed on the
LCD panel that is part of the Control Station. When the error is corrected, release the
Emergency-Stop button, acknowledge the User interface message and continue
printer operation.
Maintenance Station Interlock Function:
The Maintenance Station is located under the carriage and provides access to clean
the printheads. Carriage and Gantry motion motors are disabled and UV lamps are
turned off (if they were On), when the station sliding door is open. This includes the
Gantry Drive and Carriage Drive. Interlock system is automatically reset when
sliding door is closed. No User interface message with operator acknowledgment is
required to re-enable function of the printer.
30 Chapter 3 Safety Information