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TECHNI CAL REFEREN CE MECH ANICA L DETAIL Chapter Issue 8 Dec 02 ProFlow Manual 1.21 Pneumatic Gun The pneumatic gun is an optional accessor y for the r echargeable tr ansfer head. The gun, supplied with a holster , is f…

TECHNICAL REFERENCE

MECHANICAL DETAIL

1.20 ProFlow Manual Chapter Issue 8 Dec 02

Recharging Recharging the rechargeable transfer head is carried out using the following

standard cartridge:

• 'Semco' type - 500g or 1kg sizes

NOTE

Maximum cartridge diameter should not exceed 43.6mm

These cartridges are utilized by using either of the following:

• Manual 'Mastic' Gun

• Pneumatic Gun (optional)

NOTE

When using a 500g cartridge, an adaptor (supplied) is fitted between the

cartridge and rear of the gun.

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.

Manual Mastic Gun The standard cartridge, as listed above, can be fitted to a general purpose

mastic gun as shown in the Mastic Gun and Cartridge figure.

Figure 1-14 Mastic Gun and Cartridge

NOTE

For detailed procedures of print material filling refer to the Consumable Replen-

ishments chapter of the machine manual or the ProFlow Best Working Practices

guide (DEK Part No. 171280).

TECHNICAL REFERENCE

MECHANICAL DETAIL

Chapter Issue 8 Dec 02 ProFlow Manual 1.21

Pneumatic Gun The pneumatic gun is an optional accessory for the rechargeable transfer head.

The gun, supplied with a holster, is fitted to the machine and is pneumatically

connected to the factory air supply. The gun enables ready access and use for

regular charging of the ProFlow unit.

Figure 1-15 Pneumatic Gun (optional)

NOTE

For detailed procedures of print material filling refer to the Consumable Replen-

ishments chapter of the machine manual or the ProFlow Best Working Practices

guide (DEK Part No. 171280).

TECHNICAL REFERENCE

MECHANICAL DETAIL

1.22 ProFlow Manual Chapter Issue 8 Dec 02

Downstop The downstop applies to GSX, Lt and Infinity machines only. The purpose of

the downstop is to provide ProFlow with a zero pressure datum when ProFlow

is at contact height with the screen.

Downstop Position This is the position where the downstop is pre-tensioning the squeegee suspen-

sion and compression springs. A software offset can be implemented to +/-

10mm from the squeegee reference position.

Figure 1-16 Downstop Shown in Downstop Position

As the squeegee mechanism is mounted on a both positive and negative sprung

suspension system, any force exerted by the squeegee motor (relative to a fixed

position, ie the stencil), creates a damping force, causing the squeegee mount-

ing to move as it exceeds the sprung force.

The ProFlow downstop is fitted to the front squeegee mounting and drives

against the print carriage, compressing the main spring. This causes the

squeegee mechanism to be lifted relative to the print carriage, pre-loading the

system’s main compression spring and effecting a ‘solid’ platform for the

ProFlow to work from.

Side View of Squeegee Mounting Assembly

Front Squeegee Mount

Lowered Downstop in

Contact with Print

Carriage

Squeegee Mechanism

Pre-tensioned to Full

Extent

Print Carriage

Compression Spring

Suspension Spring