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TECHNIC AL RE FERENCE ADJUS TMENT S AND SETTINGS 1.40 ProFlow Manual Chapter Issue 8 Dec 02 Figure 1-28 Cassette Low Sensor Adjustment Sof tware Pressur e Adjustment The sof tw are cont rolled regulator c an be instr uct…

TECHNICAL REFERENCE

ADJUSTMENTS AND SETTINGS

Chapter Issue 8 Dec 02 ProFlow Manual 1.39

ADJUSTMENTS AND SETTINGS

Cassette Low

Sensor

The cassette low sensor position can be changed in order to minimize print

material wastage. A graduated scale (millimetre) on the actuator cylinder body

provides a reference point for accurate sensor positioning, (Cassette Low

Sensor Adjustment figure refers). The sensor is moved up or down by loosen-

ing the securing screw, (1.5mm Allen key).

The factory setting for the sensor is set to 20mm on the graduated scale. Each

millimetre movement is equivalent to approximately 43gms of print material

usage.

WARNING

SOLDER PASTE AND SOLVENTS. WHEN USING OR HANDLING ANY SOLDER

PASTE OR SOLVENT FORMULATION THE MANUFACTURERS’ RECOMMEND

SAFETY PRECAUTIONS MUST BE STRICTLY ADHERED TO.

WARNING

PROTECTIVE CLOTHING. APPROVED PROTECTIVE CLOTHING SHOULD BE

WORN BY SOLDER PASTE AND SOLVENT HANDLERS AT ALL TIMES TO

ELIMINATE FUME INHALATION, EYE CONTACT, SKIN CONTACT AND

INGESTION.

The following procedure should be carried out when print material wastage is

excessive.

1. Gain access to the ProFlow unit by opening the machine cover.

2. Lift off the ProFlow pressure mechanism cover.

Cassette Option 3. Noting the present position of the sensor against the graduated marker,

loosen the sensor using a 1.5mm Allen key.

4. With each graduation on the graduation scale being equivalent to approxi-

mately 43gms of print material, move the sensor down by single graduations

until the optimum print material usage position is obtained, (Cassette Low

Sensor Adjustment figure refers).

5. Carefully re-tighten the sensor securing screw.

NOTE

To prevent damage to the sensor, do not overtighten grub screw.

6. Replace the pressure mechanism cover.

7. Close the machine cover.

Rechargeable

Transfer Head

Option

8. When using a rechargeable transfer head and paste low sensor activation

is required at the mid diaphragm point the reed sensor can be inverted so

that a higher sensor initiation can be achieved. (In this position the sensor

cable is at the bottom of the sensor.)

TECHNICAL REFERENCE

ADJUSTMENTS AND SETTINGS

1.40 ProFlow Manual Chapter Issue 8 Dec 02

Figure 1-28 Cassette Low Sensor Adjustment

Software Pressure

Adjustment

The software controlled regulator can be instructed to supply and maintain

pneumatic pressure to the piston crosshead within the range of 0.0 bar to 4 bar,

or no pressure at all.

Software controlled piston pressure has four settings:

• Print Paste Pressure

• Knead Paste Pressure

• Idle Paste Pressure

• No Pressure

NOTE

For ProFlow cassette option - ensure that the

cable of the sensor is configured to the top.

Rechargeable transfer head option - sensor may

be inverted (cable to the bottom) if paste low

activation is required at mid way point.

Securing

Screw

Graduated Scale (1mm increments)

Piston Crosshead

Sensor

20 (mm) Factory Setting

1mm Graduation 43gms Print

Material Usage

TECHNICAL REFERENCE

ADJUSTMENTS AND SETTINGS

Chapter Issue 8 Dec 02 ProFlow Manual 1.41

NOTE

If Advanced ProFlow is set to enabled, Print Paste Pressure is replaced by the

following parameters, which can be independently set:

• FWD Start Pressure

• FWD End Pressure

• RWD Start Pressure

• RWD End Pressure

Print Paste Pressure This is the set operating pressure whilst the ProFlow unit is in the printing mode.

On removal of the print paste pressure (piston pressure), ie on completion of

print stroke, the print paste pressure is reduced to idle paste pressure.

NOTE

Print paste pressure can be adjusted in the product file under edit data or by

selecting the Adjust button during machine running.

Knead Paste

Pressure

This is the set operating pressure whilst the ProFlow unit is in the kneading

mode. On removal of the knead paste pressure (piston pressure), ie on

completion of kneading, the knead paste pressure is reduced to idle paste

pressure.

NOTE

Knead paste pressure can be adjusted in the product file under edit data or by

selecting the Adjust button during machine running.

Idle Paste Pressure A light pressure is applied whilst the ProFlow unit is idle but remaining in contact

with the stencil surface. This pressure is sufficient to prevent air pockets

forming in the ProFlow system but not enough to cause print material seepage.

NOTE

Idle paste pressure does not affect movement of the screen chase.

Idle paste pressure can be adjusted in the product file under edit data or by

selecting the Adjust button during machine running.

No Pressure No pressure is exerted whilst the printer is in the following configurations:

• When refilling or changing a cassette.

• Whilst the ProFlow unit is off the stencil.

• Whilst the ProFlow unit is being placed on, or lifted off the screen.

In the event of an E Stop action, pressure on the transfer head is released

altogether.

Upon restoration of system power any pressure that was previously applied to

the unit is restored, provided that the system is not re-initialized.