SMT, PCB Electronics Industry News

SMT, PCB Electronics Industry News

News from ESSEMTEC


Essemtec to Display CDS6700 Solder Paste Dispenser at Productronica 2007

Oct 29, 2007

Aesch/Switzerland � Essemtec AG, a leading manufacturer of surface mount technology production equipment, announces that it will highlight the CDS6700 dispenser with the new piezo flow valve for solder paste dispensing in booth A5-277 and A5-278 at the upcoming Productronica 2007 exhibition and conference scheduled to take place November 13-16, 2007 at the New Munich Trade Fair Center in Munich, Germany.

CDS-PFV (Piezo Flow Valve) has been developed for "filled" liquids. The special valve sealing technique allows the dispensing of media with weak materials such as solder paste. CDS-PFV provides fast and accurate metering of solder paste or conductive adhesive, is recommended for pasty liquids, small dot metering and continuous line dispensing, and provides integrated valve heating.

CDS-PFV is a sliding valve with piezoelectric actuators. It is possible to influence the metering mass as well as the drop diameter by means of pressure, temperature, opening time and needle diameter. Undercuts causing gas bubbles and, thus, improper meterings can be reduced due to the special connecting geometry. Precision metering needles are available within an inner diameter range of 0.1 to 1.37 mm. The ceramic tight fit plates can be disassembled for cleaning purposes.

Due to the maintenance-free and extremely fast piezoelectric drive, it is possible to achieve meterings with a frequency up to 10 Hz. The minimum metering time of 2 ms allows smallest metering quantities up to approximately 10 nl (depending on the medium). Because of the incremental width of 10 μs, it is possible to effect a very exact setting of the metering quantity.

Due to the arrangement of the robust piezoelectric actuators and the exchangeable sealing parts, the lifetime of the drive and the valve seal is high. Maintenance and control of the valve seal is recommended after 3,000,000 metering cycles (depending on the medium). Also, programmable valve opening time provides programmable dispensing volume and integrated valve heating provides viscosity control independent of surrounding conditions.

CDS6700 with PFV solves numerous issues, including solder paste dispensing instead of printing, dispensing of liquids filled with ductile particles (such as solder paste or silver-filled glue), dispensing of solder paste dots as small as 100 �m (4 mil), prototype dispensing instead of printing in SMT assembly and versatile use of the dispensing system for other applications with short changeover times. The system is targeted to startup SMT manufacturers with small series, flex circuit electronics manufacturers (e.g., sensors), membrane keyboard manufacturers and the general assembly industry. CDS6700 with PFV is an affordable solution designed for entry-level companies doing SMD prototyping.

The CDS6700 platform provides numerous benefits to users, including the following: an exchangeable valve that provides quick changeover and versatile use of the dispensing platform for other applications; XYZ drive system that allows for the dispensing of dots, lines and circles; and automatic dot size adjustment (ADSA-System) that provides automatic correction of the dispensing parameters if liquid conditions have changed, automatic temperature compensation, automatic viscosity change compensation and automatic cartridge fill level compensation. Available as benchtop, standalone or inline, the platform is field upgradeable, allowing the dispenser to grow with production requirements. Additionally, the systems feature surface scanning and automatic height calibration that allow for automatic correction if the substrate is not flat as well as touchless dispensing with controlled needle-substrate distance. Internet-based remote support provides shorter problem solving times, saves travel costs for product specialists and results in constant support � anywhere at any time.

About the company:

Essemtec is a worldwide leader in the manufacturer of Surface Mount Technology (SMT) production equipment. Essemtec specializes in high mix production equipment for Printed Circuit Boards (PCB) using Surface Mount Technology.

Essemtec is the only manufacturer to cover the entire production process, from Printers and/or Dispensers, to Pick-and-Place and Soldering equipment. Therefore, customers benefit from unparallel knowledge and the ability to select, from a single source, a complete process solution to meet their requirements.

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