IJ4000 Impulse Jet
Section 2: Quick Start
5765-018 Operations Manual Rev J
Page 24
Step 10: Mount Photosensor and Encoder
Photosensor
1. Position the photosensor (5760-383) upstream
from the first print head. The maximum place-
ment distance is 685,9mm [27in] from the pho-
tocell to the print head.
2. Refer to the instruction sheet included with the
photosensor for calibration.
3. Refer to the “Photosensor Sensitivity Test” on
page 41 of this manual to test the calibration.
Encoder
The encoder uses a wheel that rolls against the conveyor line to track the speed. It
sends a signal to the controller, which makes adjustments for reported changes in
the line speed.
It is not necessary to install the encoder immediately adjacent to the print heads. It is
more important to place it where it will accurately measure the speed of the con-
veyor. Install it in contact with the conveyor, or with a wheel or roller moving the
same speed as the conveyor.
The encoder's mounting bracket is spring-loaded. Adjust the spring collar to ensure
that the encoder maintains stable contact with the conveyor.
CAUTION:
Do not excessively pre-load the encoder wheel against the surface of
the conveyor. A radial force of over 18,14 kg [40 lbs.] will reduce the life of the bear-
ings.
Bracketry
Conveyor
Print Head
Conveyor
Encoder
Encoder Wheel
Spring