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74 User Manual
Appendix 1:Installations & Setting Up
Print Height
If the printhead is moved nearer to the surface to be printed, height of the printed character will decrease
- if moved further away, its height will increase.
However, adjustment of the print height should be controlled through the SETUP menu.
NOTE:
Do not attempt to adjust the printed character height by changing the printhead-to-
product distance. This may result in deterioration of print quality.
Setting up the Photocell
The photocell is used to detect the presence of a product to be printed on. There are variations in the
way this "trigger" can be interpreted by the system, but usually a message is printed in response to a
signal from the photocell.
The photocell should be mounted upstream of the printhead (so it detects the product before the product
reaches the printhead), as close to the printhead as possible and at a distance from the product which
gives consistently reliable triggering when a product passes it. A delay between the photocell being
triggered and the print taking place can be set by a menu command, to aid fine adjustment of print
positioning on the product.
Photocell Connections
The photocell is connected to the system via a 9-pin D - Type connector. The function of each pin is
described below:
Pin 1
+24 volts
Pin 2
0 volts
Pin 6
Next Object Signal
If the photocell has a screened conductor, it should be connected to the shell of the D - Type connector
and to the printer chassis at the printer end of the cable (it must not be connected to 0 volts).
CAUTION:
Electromagnetic Compatibility performance may be compromised by the use of unsuitable
photocells. Use only EC-JET approved accessories.
Photocell bracket swivels in both axes
To counteract light reflections thus
Improving product detection
EJ110
