Dek 248 Screen Printer

• Flexible, entry level screen printer
The 248 Dek screen printer is an entry level unit developed for customers requiring a flexible, semi-automatic machine with high precision and high yield capabilities.

Dek 248

The 248 uses precision design and technology to achieve a high level of screen printing accuracy. For fine pitch applications, the DEKalign 4 vision system allows 248 users to check board alignment for accuracy prior to printing, enabling fine pitch printing to be achieved regardless of errors in PCB dimensions. In addition, an align/inspect mode is programmable via the machine menu function, allowing the operator to select board frequency. DEKalign 4 is available as an option or a retrofit package.

The casting and machine tool bearings used in the 248 screen printing ensure accuracy and repeatability for demanding fine pitch applications. Features include: micro controlled set-up and operation; motorised squeegee drive; programmable PCB/stencil separation; and a double squeegee with single pressure setting and independent control of front and rear blades.

• Ease of Operation
Operation control is menu-driven via a backlit LCD touch-sensitive control panel. This includes a full range of diagnostic functions.

Set-up is fast and simple, with the facility to store up to 30 programs for rapid recall.

• Tooling
Squeegee supports and PCB registration, which uses fixed pins that locate in holes provided in the PCB along with the magnetic pin board, are supplied as standard with every machine.

Magnetic vacuum cups hold the board in place to ensure separation from the stencil after printing. For boards without tooling pin locations, edge clamp tooling can be provided. Using 3 fixed and 2 pneumatically-operated registration pins, these grip the edge of the board (1mm minimum board thickness) giving repeatable registration.

Dedicated tooling for special applications can also be offered following consultation with our application team.

• DEKalign 4
DEKalign 4 uses Windows NT with icons and a mouse pointer-based operator interface to provide an intuitive and easy-to-use system for the alignment of PCBs. It shows images from two monochrome cameras on a single high resolution display complete with transparent coloured overlays of a trained pad or fiducial.

The live video can be clearly seen through the overlay, which colours the image. The colour of the overlay signifies whether or not the board is aligned and ready for printing. Red indicates mis-alignment, whilst green or blue indicates that the board is correctly aligned, thus providing a greater level of process control and higher yields.

On the 248 this interface takes the form of a standard single PC monitor and hand held track-ball mouse.

• New Camera Alignment
A pneumatically operated ‘Single Point Release Button’ reduces set-up time. For more accurate positioning, the linear bearing system ensures smooth, robust motion when aligning the cameras to the PCB or mylar.

DEKalign 4 has improved the handling of HASL boards, and is a system that can be easily extended as new vision enhancement packages are developed.

The system makes use of ‘off-the-shelf ’ components, thereby enabling local sourcing of spare parts.

• Build Quality and Performance
To document machine-specific performance, SPC data is collected and supplied with every machine.

DEK’s ISO 9001 certification is an indication of the company’s total commitment to quality, as is our adherence to maintaining CE approval at each stage of the 248 build program.

• Process and Operator Training
DEK has developed machine operation, preventative maintenance and process control courses using Performance Based Equipment Training (PBET) – a range of techniques that make all training courses highly focused.

These courses are designed to enable customers to achieve effective and efficient utilisation of their DEK 248 screen printer.

Training may take place either at a local DEK Training Centre or, alternatively, at the customer’s own site.

Dek 248 Printers Technical Specification:

For Technical data spesicications please visit: www.dek.com