Installation manual

STS400™ INSTALLATION MANUAL
26
2
2.6 PRESENCE SENSOR POSITIONING
The STS400™ system comes with a pair of photocells that can be used to detect the
presence of the tire on the conveyor and trigger the beginning and the end of the reading
phase. When used, they must be positioned and mounted at the conveyor belt level
depending on the size of the tires that must be handled.
Position the presence sensors according to the following procedure:
1. Retrieve the size of the minimum
tire height (H
min
) and the minimum tire width (W
min
) of
the tires.
2. Determine the field of view along the conveyor direction (FOV
v
) at the maximum distance.
See the table below.
3. If the minimum tire height (H
min
) is less than the FOV
v
/2 at the maximum distance, then
both Reading Phase ON and Reading Phase OFF presence sensors are required and
they must be mounted at the H
min
distance from the edges of the vertical FOV as shown
in the figure below:
Top Reading Station with Two Presence Sensors
STS400™ Model
Reading Station Type
Vertical FOV @ Maximum
Reading Distance mm (in)
STS400-01x Top Reading Station High Resolution
for Car/Light Truck Tires
190 (7.5)
STS400-00x Top Reading Station Standard Resolution
for Car/Light Truck Tires
240 (9.5)
STS400-10x Top Reading Station Standard Resolution
for Commercial Vehicle Tires
270 (10.6)
STS400-20x Bottom Reading Station * see note
STS400-30x Hook Chain (Side) Reading Station 159 (6.3)
PS1
max distance
H
min
= minimum tire height (lowest profile tire)
W
min
= minimum tire width (narrowest tire)
PS1 = Reading Phase ON Photocell
PS2 = Reading Phase OFF Photocell
FOV
v
@ max dist
H
min
PS2
Tire Height
Tire Width
W
min
H
min