88242361-04-01 Vol 1 DEK TQ TECHNICAL REFERENCE (1) - 第40页

4 MACHINE OVERVIEW 4.1 MODULE OVERVIEWS 40 TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 5 4 3 2 1 Fig.1: 1 Vacuum Pump 4 Vacuum Filtration Unit 2 Under Stencil Cleaner (USC) 5 Solvent Tank 3 USC Driptray

4 MACHINE OVERVIEW

4.1 MODULE OVERVIEWS

TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 39

4.1.6.2 Auto Coplanarity

Auto coplanarity aligns the chase with the tops of the centre section of the front and rear transport

conveyors. This ensures that when the board is presented to the stencil for the print stroke, they

are level.

This is achieved by using two lasers (1) mounted left and right of the print carriage. Four measure-

ments are taken on the stencil directly above the transport conveyors. The stencil is removed and

four measurements are taken in the same place on the tops of the transport conveyors. The meas-

urements are compared and the chase is levelled to the conveyors using motors (2 and 3) left and

right at the front of the chase. The chase is pivoted from the rear of the chase (4) which also sets

the height of the chase.

4.1.7 Under Stencil Cleaner (USC)

The USC module automatically cleans the underside of the stencil, reducing the build-up of print

medium.

The module consists of:

●

Under Stencil Cleaner

●

Solvent Tank

●

Vacuum Pump

●

Vacuum Filtration Unit

The vacuum filtration unit aids in removing excess print medium from the underside of the stencil

and fumes created by the solvent/print medium.

The USC traverses in the Y direction using the Y drive linear motor. The Y drive is also shared by

the camera carriage.

4 MACHINE OVERVIEW

4.1 MODULE OVERVIEWS

40 TECHNICAL REFERENCE MANUAL DEK TQ 04/2021

Fig.1:

1 Vacuum Pump 4 Vacuum Filtration Unit

2 Under Stencil Cleaner (USC) 5 Solvent Tank

3 USC Driptray

4 MACHINE OVERVIEW

4.1 MODULE OVERVIEWS

TECHNICAL REFERENCE MANUAL DEK TQ 04/2021 41

4.1.8 Transport Conveyors Module

The transport conveyor is a programmable width system, designed to transport the board through

the machine (using belts) and to secure the board during the print stroke.

The front conveyor is fixed whilst the rear conveyor is adjusted by software to the board width.

There are two types of conveyor systems:

●

Over the Top Clamping (OTC)

●

All Purpose Clamping (APC)

Both conveyor systems have three stages allowing three boards in the printer at any one time. The

input auxiliary section can hold an incoming board until the print section is available. The print sec-

tion secures the board and lifts the board up to the stencil, ready for printing. The output auxiliary

section can hold a printed board until the downline machine is available.