Micron Technical Reference V9 Volume 1 - 第39页

SAFETY FEATURES PRINTHEAD COVER Chapter Issue 14, Feb 18 Technical Reference Manual 2.15 PRINTHEAD COVER Safety Interlocks The safety featu res designed into the printer are for the protection of all operators and mainte…

SAFETY FEATURES

GENERAL

2.14 Technical Reference Manual Chapter Issue 14, Feb 18

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

maintain maximum safety for the operator whilst solvent priming or paper

feeding with the printhead cover 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

movement of 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.

SAFETY FEATURES

PRINTHEAD COVER

Chapter Issue 14, Feb 18 Technical Reference Manual 2.15

PRINTHEAD COVER

Safety Interlocks The safety features designed into the printer are for the protection of all

operators and maintenance personnel. ASM strongly recommend safety

devices are never overridden.

Opening the printhead cover allows access to the following areas:

• Printhead

• Paste Dispenser

• Squeegee/ProFlow

• Stencil/Screen

• Under Screen Cleaner

• Tooling

The printhead cover is accessible to the operator and an 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 printer modules.

Full details of the device types fitted can be found in the covers chapter of this

manual.

NOTE

The pass through lane belt motors on the dual lane printer continue running

when the printhead cover is open but stop when the E Stop is pressed.

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

print cycle. The lid bolt is withdrawn and the cover may be raised:

• When Open Cover is requested by software

• When pause or stop is selected during a print cycle

• When the E Stop is pressed

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

HIGH VOLTAGE PROTECTION

2.16 Technical Reference Manual Chapter Issue 14, Feb 18

HIGH VOLTAGE PROTECTION

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

trolling access to the enclosures that house the supply. The printer 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 EPA and metal covers printers, which use the covers to make the

bond, all external metal surfaces are mechanically and electrically bonded to

the printer 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.