Installation manual

INSTALLATION
21
2
2.4 SUPPORTING PROFILE HEIGHT ADJUSTMENT
The frame profile supporting the STS400™ must be positioned at the correct height in order
to completely overlap the STS400™ nominal DOF to the application DOF.
Note: The application DOF is the difference between the maximum tire width and the
minimum tire width.
If the DOF required by the application is less than the STS400™ nominal DOF, it’s strongly
suggested to balance the overlap by keeping the centers of both DOFs coincident:
Inst H
Application
DOF
Inst H
In the figure on the right, the STS400™ nominal DOF is perfectly overlapped and centered
on the application DOF.
The installation height (Inst H in the figure), which is the distance from the reader window
surface to the conveyor plane is calculated by the following formula:
Inst H = Tire_W
min
+ (Application_DOF / 2) + DOFc_dist
Where the DOFc_dist is the distance between the reader window surface and the center of
the STS400™ DOF; this value changes according to the model:
STS400™ Model
Reading Station Type
Maximum Reading
Distance mm (in)
STS400-01x Top Reading Station High Resolution
for Car/Light Truck Tires
810 (31.9)
STS400-00x Top Reading Station Standard Resolution
for Car/Light Truck Tires
1015 (40)
STS400-10x Top Reading Station Standard Resolution
for Commercial Vehicle Tires
1080 (42.5)
STS400-20x Bottom Reading Station *
STS400-30x Hook Chain (Side) Reading Station 482.5 (19)
* For Bottom reading stations the reading distance is a fixed value approximately equal to the
top of the conveyor plane. Tire_W
min
is not significant, Application_DOF/2 is negligible.
Inst H is typically set to the minimum reading distance, see par. 2.3.4.