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Operation
To set the encoder resolution
If a rotary encoder is connected to the controller, the print speed is automatically matched to
the conveyor belt speed through the impulses of the rotary encoder.
The following parameters must be entered:
Rotary encoder resolution the resolution is the number of pulses per inch (ppi).
Intensity
the intensity in dpi (dots per inch).
Printing width
The number of pixel can be increased or decreased using this parameter. The print
image becomes narrower or wider.
Calculation example of rotary encoder resolution:
The standard rotary encoder has a friction wheel circumference of 200 mm and
generates 5 000 impulses per revolution. If the friction wheel of the rotary encoder runs
directly on the belt, the calculation is as follows:
1.
Conversion
200 mm / 25.4 mm = 7.874 inches
2.
Resolution of the rotary encoder:
5000 impulses / 7.874 inches = 635 impulses/inch = 635 dpi
3.
To get even finer settings, the pulse will be doubled internal.
4.
If you set a divider of 4, you will get a resolution of 318 dpi (635x2/4). This value must be
entered for the intensity.
If a standard rotary encoder is mounted directly onto a shaft, the distance to be measured
is the distance covered by a product on the conveyor belt during a single rotary encoder
revolution (e.g. 300 mm).
5.
Conversion
300 mm / 25.4 mm = 11.81 inches
6.
Resolution
5000 impulses / 11.81 inches = 423 impulses/inch = 423 dpi x2 = 846 dpi.
The result of divider 2 is 426 dpi.
The calculated value must be then fine-tuned, using the test image. (Speedtest.00I)
to
to
of
the
Parameter
Encoder
Print intensity
Printing width
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72800115 Markoprint X4JET
rotary
encoder:
Min.
Max.
Unit
50
5000
ppi
50
900
dpi
10
900
%
inches:
inches:
GB
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