Setting Up The Shaft Encoder; Shaft Encoder Connections - EC-PACK EC-JET 1000Pro Manual

and to the printer chassis at the printer end of the cable (it must not be connected to D volts).
CAUTION: Electromagnetic Compatibility performance may be compromised by the use of unsuitable
photocells. Use only EC-JET approved accessories.

1.7 Setting up the Shaft Encoder

Shaft encoders are recommended for production lines where variable speed is likely. A shaft encoder
generates a pulse for a fixed distance of product movement. This can be used to produce 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 line
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 3 m or 5 m connecting cable.
For applications where the encoder needs to be driven from a conveyor belt or from the product, ECJET
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
raster 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 +24 volts
Pin 2 0 volts
Pin3 +5 volts
Pin 8 Single Ended Input
Guangzhou EC-PACK Packaging Equipment Co., Ltd.
EC-JET 1000Pro Continuous Inkjet Printer
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