Appendix B: Theory of Operation
Marksman Matrix & Elite
2465-623 User Manual Rev F
Page 82
Appendix B: Theory of Operation
The Marksman© Matrix & Elite
The Marksman Elite and Matrix are high-resolution ink jet coders used to print fixed and/or
variable information onto cartons as they pass in front of the print heads on a conveyor.
The Marksman Elite and Matrix are industrial PC-Based controllers that use a single board
computer (SBC) running Windows Embedded Systems 7 to process and generate the
images to be printed. Included on the SBC are all the peripherals associated with the com-
puter, such as the video controller, Ethernet controller and USB controllers. In addition to
the SBC, there are USB print head controller boards (USBPHC). The USBPHC board is
responsible for converting an image from the SBC to image data that the print head can
print. The USBPHC board uses a USB port to relay head status information from the head
to the SBC. The USBPHC board sends and receives data to the head through the print
head cable (DB25) as needed.
Messages are entered using the touch screen display with software keyboard. All message
and programs are stored on a solid state hard drive and is recalled as needed when a mes-
sage is selected. For the Elite, power for the system is create from two different power sup-
plies, 12V needed for the SBC and display and 24V for print head heaters and the DC-DC
converter. The Matrix only requires an external 24V power supply. The 12V is generated
internally from the 24V supply.
Print Heads
The Marksman© Matrix & Elite supports all the Marksman series printheads. A typical prin-
thead includes a reservoir section, drive electronics, and a print engine. The information
and power needed for printing are sent to the print head through the DB25.
The drive electronics include a Universal Driver Board and Marksman© Driver Board. The
Universal Board takes 24VDC and generates the high voltage needed by the print engine.
The
APS
includes an ink collection bottle, vacuum pump, APS board, purge pump and res-
ervoir. The APS cycle is controlled by the Controller via a DB9 cable. Parameters are set
through the software. It is important for the cable to be connected. The power and low ink
signals are sent to the Controller through the DB25 cable. The ink collection bottle stores
the used ink from the APS cycles. If the bottle becomes full, or the reservoir is low, the APS
is disabled and the red LED on top of the Ink Supply will turn on.
Photosensor
The photosensor detects a product as it passes in front of the sensor. The signal starts the
printing process. Once the printing process has started it will continue until the label is com-
plete, regardless of what the photosensor signal does.
Encoder
The encoder is used to signal the controller when to print another column of ink. There are
two encoder options, external or internal. The external encoder rides on the conveyor to
determine how often to print a column of ink. As the conveyor's speed changes, so will the
period of time between the printing of the columns of ink. The internal encoder is timed-
based so that if the speed of the conveyor changes the print will be stretched or com-
pressed until the encoder speed is corrected.