EC-PACK EC-JET 2000, Manual

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User Manual The1.1 version of 2018 Guangzhou EC-PACK CO.LTD
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constant width print as the line speed increases or decreases.
If an encoder is to be fitted, it should be attached to a suitable production line drive shaft, with
appropriate gearing if necessary. It must be installed and driven in a position where it best follows
the movement of the product being printed on.
The calculations shown in the next few pages should be used to select the optimum arrangement
for your application. EC-JET will be happy to advise on the best position and gearing for shaft
encoder installation.
The selection of encoder and gearing will determine the printed pitch and the maximum possible
ling speed for the application. The printer allows some variation using the Print Width parameter,
but the initial selection of the encoder and gearing is critical.
EC-JET offer a range of shaft encoders:
●
2500 pulses per revolution
●
5000 pulses per revolution
●
10000 pulses per revolution
Each is available with either a 3m or 5m connecting cable.
For applications where the encoder needs to be driven from a conveyor belt or from the product,
EC-JET provide the encoder wheels:
●
188.8mm circumference (60mm diameter)
A given encoder and drive gearing will have a fixed encoder pitch - that is, the distance travelled
by the product for each pulse cycle of the encoder output. The width control in the printer is used
to generate rasters at integer multiples of the encoder pitch. This multiplier is the pitch factor and
will always be a whole number. The calculations on the following pages show how this is used
and explain the difference between pitch factor and print width.
1.7.1
Shaft Encoder Connections
The shaft encoder is connected to the system via a 9-pin D - Type connector. The function of each
pin is described below:
Pin 1 + 24volts
Pin 2 0volts
Pin 3 + 5volts
Pin 8 Single Ended Input
The screened conductor 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: EMC performance may be compromised by the use of unsuitable shaft encoders.
Use only EC-JET approved accessories.
1.7.2
Selecting the Encoder, Gearing, and Print Width
When using a shaft encoder it is vitally important that the calculations are followed and the print
width is computed based on the geometry of the set up. If guessed at, messages will not be printed