Owner's manual

EZA-TE Series Tubular Enclosures
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: [phone]
2 P/N 117107 Rev. D
Do not position reflective surfaces
within the shaded area
Receiver with
enclosure
Emitter with
enclosure
d
d
Operating Range to 3 m (10'): d = 0.26 m (10")
Operating Range > 3 m (>10'): d = 0.0875 x R (m or ft)
Operating
Range (R)
Figure 2. Adjacent reflective surfaces
Adjacent Reflective Surfaces
A reflective surface located adjacent to the defined area may deflect one or more beams
around an object in the defined area. In the worst case, an “optical short circuit” may
occur, allowing an object to pass undetected through the defined area (see Figure 2).
This reflective surface may result from shiny surfaces or glossy paint on the machine,
the workpiece, the work surface, the floor or the walls. Beams deflected by reflective
surfaces are discovered by performing the trip test portion of the final alignment
procedure and the periodic checkout procedures (Section 3.4.4 of the EZ-SCREEN
Instruction Manual).
To eliminate problem reflections:
• If possible, relocate the sensors to move the beams away from the reflective
surface(s), being careful to maintain adequate separation distance (see Figure 2).
• Otherwise, if possible, paint, mask or roughen the shiny surface to reduce its
reflectivity.
• Where these are not possible (as with a shiny workpiece), mount the sensors in
such a way that the receiver’s field of view and/or the emitter’s spread of light are
restricted.
• Repeat the trip test to verify that these changes have eliminated the problem
reflection(s). If the workpiece is especially reflective and comes close to the defined
area, perform the trip test with the workpiece in place.
It is important to note that using these tubular enclosures will increase (effectively
double) the distance “d” shown in Figure 2. The curved surfaces increase the potential
angle of the beams. Calculate the position of the emitter and receiver based on the
formula shown in Figure 2 (in addition to the separation distance information presented in
the EZ-SCREEN manual).
WARNING . . . Avoid Installation
Near Reflective Surfaces
Avoid locating the defined area near
a reflective surface; it could reflect sensing beam(s)
around an object or person within the defined
area, and prevent its detection by the EZ-SCREEN
System. Perform the trip test, as described in
Section 3.4.4 of the EZ-SCREEN Instruction Manual,
to detect such reflection(s) and the resultant optical
short circuit.
Failure to prevent reflection problems will result in
incomplete guarding and could result in serious
bodily injury or death.