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Automatic Height Calibration system
One of the most critical parameters during dispensing is the correct offset from the nozzle to the PCB. The CDS dispensing systems can be equipped with a fully automatic height calibration systems.
It is possible to program a measuring grid which covers the dispense area for each board type.
Within this defined grid the system automatically measures the correct height before each production run.
the laser and vision based system avoids damage to the PCB as it completely eliminates the need for having a stand off foot on the nozzle. Additionally it allows dispense of dense dot positions as no space is required for the stand off foot.
PCB fixtures on stand alone systems
Both system platforms are equipped as standard with a PCB fixture designed for single or double sided boards.
Additional support or bacuum pins can be mounted. Also available is a vaccum plate with an external vacuum for flexible or sensitive board fixing.
PCB fixtures on stand alone systems
Both system platforms are equipped as standard with a PCB fixture designed for single or double sided boards.
Additional support or bacuum pins can be mounted. Also available is a vaccum plate with an external vacuum for flexible or sensitive board fixing.
Time/pressure valves
The time/pressure valve is ideal for dispensing adhesives. The liquid does not get in direct contact with the valve itself and reduces the need for regular cleaning of the valve.
In combination with the unique feature of height compensation and the vision system for automatic dot sie calibration this valve is used for precise and fast applications.
The time/pressure valve is available either on a pneumatic(CDS6705) or on a motor driven, height programmable Z-axis.
 
The CDS6700 system platform includes a mechanically stable x/y system which is already in use worldwide as the base for a fully automatic SMD pick and place system. Avaiety of different valves can be adapted to fulfil many of today's standard dispensing applications It is available as a table top, stand alone or as a single-stage SMEMA inline system.

  CDS6705 CDS6710 CDS6720 CDS6740
Application   Adhesives, encapsulation, potting, sealing   Adhesives, encapsulation, potting, sealing   Solder paste, adhesives, encapsulation, potting, sealing   Adhesives, encapsulation, potting, sealing, dam / fill
Installed valve(s)   Time/pressure   Time/pressure   1xPositive Displacement
(Archemedian screw)
  2x Time/pressure
Dispensing types   Dot, not interpolated lines, curves, circles   Dot, not interpolated lines, corves, circle   Dot, not interpolated lines, corves, circle   Dot, not interpolated lines, corves, circle
max. speed Dot/hour   15000 dots/h
System type   table top or optional stand alone system
Stand alone system   Adjustable PCB fixture with optional support and vacuum pins
maximum board size   550x568mm(21.6x22.3")
maximum dispensing area   450x440mm(17.7x15.7")           380x400mm(15x15.7")
Inline System   SMEMA compatible single stage conveyor
maximum board size Inline   600x548mm(26.3x21.5")
maximum dispensing area Inline   450x400mm(17.7x15.7")           380x400mm(15x15.7")
Free height below PCB(Inline)   20mm(0.78")            
Standard features   Direct pick and place data transfer from ESSEMTEC machines, Teach In Camera
Options   Welded steel base, fiducial recognition, full pattern fiducial recognition, automatic touchless height measuring system, automatic dot size calibration, CAD data conversion software, direct pick and place data transfer from different suppliers, nozzle and PCB heating systems, nozzle cleaning systems
Motor control system   Microstepper motors on x-y axis
  Pneumatic z-axis   Microstepper z-axis   Microstepper z-axis   Pneumatic z-axis
Please consult the separate available data sheet for further information
 
 
 
Automatic fiducial recognition software
An automatic board fiducial recognition software package is available. It allows the machine to automatically find two board reference marks. Stretched, shrunk or skewed boards can be automatically detected and the program adjusts the necessary dispensing coordinates accordingly. This feature comes as a standard on all inline systems, or as an option an all stand alone machines.
Two different vision systems are available, One for standard fiducials or an extended version for difficult fiducials with less contrast.
Hot plates for heating the substrates
In some cases in conjunction with the nozzle heating system, it is necessary to preheat the substrate. When encapsulating chips, the preheat is necessary to allow a thermal reaction to prevent voids around the chips.
It is equipped with a PID controller which sets and controls the temperature precisely.
Combined dispensing systems
Some applications require dispensing two or more products in one process.Examples:
Dam & fill application
To dispense; first dam around an area with the material having a medium viscosity and then fill that area using a low viscosity material, a system with two dispensing valves is used(CDS6940)
Solder paste and glue application
To fulfill on one system the need for dispensing solder paste(ie for prototypes, small batches or selective dispensing) and adhesive dispensing(i.e. for wave soldering of SMD components) Two different valves can be installed(CDS6930)
CAD-conversion
The CDSCAD software allows to automatically generate dispensing coordinates from placement files from any CAD software.

  CDS6910 CDS6920 CDS6930 CDS6940
Application   Adhesives, encapsulation, potting, sealing   Solder paste, adhesives   Solder paste, adhesives, encapsulation, potting, sealing, dam / fill   Adhesives, encapsulation, potting, sealing, dam / fill
Installed valve(s)   Time/pressure   Positive Displacement Valve(Archemdian Screw)   1Time/pressure, 1xPositive Displacement
(Archemedian screw)
  2x Time/pressure
Dispensing types   Dot, Line interpolated, curves, circles, 3-D   Dot, Line interpolated, curves, circles,
3-D
  Dot, Line interpolated corves, circle, 3-D   Dot, Line interpolated corves, circle, 3-D
max. speed Dot/hour   18'000 dots/h
Stand alone   Adjustable PCB fixture with optional support and vacuum pins
maximum board size   600x568mm(23.6x22.3")
maximum dispensing area   500x500mm(19.7x19.7")       420x500mm(16.5x19.7")
Inline System   SMEMA compatible,3-stage conveyor system for fastest transfer times,
optional support and vacuum pins
maximum board size (Stabdard Cibvetir)   400x300mm(15.7x11.85")
maximum board size (Extended conveyou)   400x450mm(15.7x17.7")            
Free height below PCB   30mm(1.18")            
Standard features   Full pattern fiducial recognition system, Automatic touchless height measuring system,
automatic dot size calibration, direct pick and place data transfer from ESSEMTEC machines,
Teach0In camera, welded steel base,
Options   CAD data conversion software, direct pick and place data transfer from different suppliers,
nozzle and PCB heating systems, nozzle cleaning systems
Closed loop control system   Servomotors with linear encoders for highest precision(x,y), Servomotor with encoder (z-axis)