192277 - Micron Technical Reference Volume 3 - 第181页

AIR IONIZER MODULE OVERVIEW Chapter Issue 5, Aug 14 Technical Reference Manual 31.1 CHAPTER 31 AIR IONIZER MODULE OVER VI EW Item Descrip tion Item Description 1 Air Inlet 4 Air Regulator 2 Air Ionizer Bracket (in 2 posi…

PASTE ROLL HEIGHT MONITOR

REPLACEMENT PROCEDURES

30.12 Technical Reference Manual Chapter Issue 3, Aug 14

7. On completion, power up and initialize the machine and carry out Squeegee

Reference Height setting.

Removal Carry out the following procedure to remove the Roll Height Monitoring from the

machine:

1. Ensure the machine is powered down.

2. Release the front squeegee thumbscrews and remove the front squeegee.

3. Disconnect the electrical connector 9PL60 from 9SK60.

4. Using a 4mm Allen key, loosen the three Roll Height Monitor assembly

securing screws and remove the monitor assembly from the machine.

5. Fit the front squeegee ‘I’ bar and secure with the three cap headed bolts and

refit the front squeegee to the front squeegee ‘I’ bar.

6. On completion, power up and initialize the machine and carry out Squeegee

Reference Height setting (see Squeegee Module, Infinity Technical Refer-

ence Manual for details).

AIR IONIZER MODULE

OVERVIEW

Chapter Issue 5, Aug 14 Technical Reference Manual 31.1

CHAPTER 31 AIR IONIZER MODULE

OVERVIEW

Item Description Item Description

1 Air Inlet 4 Air Regulator

2 Air Ionizer Bracket (in 2 positions) 5 +24VSW Power In

3 Air Ionizer 6 Air Ionizer Electrodes

AIR IONIZER MODULE

OVERVIEW

31.2 Technical Reference Manual Chapter Issue 5, Aug 14

The air ionizer reduces the amount of static electricity to +100V, making it safe

for most static sensitive components which enter the machine.

Air is supplied to the input of the ionizing unit. An array of electrodes, mounted

on the base of the unit, ionizes the air supply. The electrodes consist of a pair

of corona discharge needles which receive a positive and negative dc waveform

at 7kV, 20Hz: producing an ionizing potential of+100V.

The electrodes are housed in a cartridge, which makes them easy to fit and

remove from their housing. Three types are available:

• Tungsten: ion balance +30V

• Silicon: ion balance +30V (used in environments sensitive to metal con-

tamination)

• Stainless Steel: ion balance +100V

Currently, ASM supply the stainless steel electrode units.

The air supply, set to 2 bar, is routed over the electrodes, ensuring a wide

dispersal of ionized air; this functionality increases the speed of static reduction.

Modes of

Operation

There are three modes of operation:

• Sensing DC Mode

• Pulse DC Mode

• DC Mode

Pulse DC Mode Currently, ASM utilise the Pulse DC Mode. The ionizer alternately emits positive

and negative ions (pulsed dc) to dissipate any spatial static charge, which may

be present in the working area.

If the ion balance voltage exceeds +100V, this may be due to needle contami-

nation; the ionizer outputs a maintenance signal. This action causes a needle

check indicator to initially pulse on and off, signalling that there may be needle

contamination. After a period of time, the indicator stays on signalling that

maintenance is required. Usually this consists of cleaning the electrode pairs.

Power Supply The air ionizer derives its power from the 24V switched supply (M37) and is

disabled when the printhead cover is open or the E Stop is pressed.

NOTE

When the air ionizer is electrically disabled, air pressure continues to flow

through the electrodes.