Thiele 00900383, Manual

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13
R
eliant
3700 M
anual
STEP 4:
Photo Sensor
Adjustment
Standard photo sensor shipped from the factory
is a diffuse reflective detector. No adjustment for
gain is required or necessary. In preparing for
operation, properly position the Sheet-Detect
photo sensor first.
Only adjust the photo sensor when the feeder
power is Off. Do not attempt to adjust the photo
sensor while the feeder power is On or while the
feeder is running. Doing so will expose you to
pinch points which can cause injury to hands or
fingers.
Potential damage to feeder parts is avoided if
adjustments are made when the feeder power is
Off.
Review
The
Sheet-Detect
photo sensor is mounted on the flexible arrm ex -
tension assembly to detect the leading edge of a product about to be
ejected so as to turn the feeder Off.
The
Flight-Detect
photo sensor is mounted on the line to detect a
target (for example, a conveyor lug) so as to eject a product.
Objective
For the
Sheet-Detect
photo sensor to be effective, it must be adjusted
within a specified range and angle to the product.
Procedure
To adjust the
Sheet-Detect
photo sensor for proper positioning, follow
these steps:
1. Aim and align the photo sensor straight toward (perpendicular
to) the product. If the photo sensor is at an angle, the light will
not be reflected straight back to the receiver.
Sheet Detect
Sensor
On the feeder, such objects as shafts, guides,
belts, and supports may cause false “reads”
if the photo sensor is not adjusted properly
for the product. The resulting problem can be
intermittent or continuous feeding. See Section 4,
Operational Troubleshooting, for a solution.
2. Position the photo sensor at distance between 1 to 1-1/2 in.
(25 to 38 mm) from the product. Initially use the adjustable
arms on the extension assembly. When only the green LED is
On, you will know when the photo sensor is positioned prop-
erly. The amber LED is On when product is staged.
3. When making the adjustment, be aware of any background
objects beyond the product range. On the feeder, such objects
as shafts, guides, belts, and supports may cause false returns
if the photo sensor is not adjusted properly for the product (or
target). The resulting problem can be continuous feeding. See
Section 4, Operational Troubleshooting, for a solution.
Avoid light colored backgrounds in the discharge
area.
For any questions you may have about adjusting
the Flight-Detect photo sensor, consult with a
qualified technician.