Banner R55E Series - Manual (Page 4)

R55 Color Mark Sensor
page 4
The lens of the R55 may be installed at
either of two lens ports (see Figure 3).
The lens and the lens port cap are both
threaded and may be exchanged by hand;
no tools are required. The lens and cap
both include an o-ring seal.
The R55 includes a total of eight size M5
threaded holes used for mounting (see
dimension drawing on page 8). These threaded holes are positioned to match the mounting hole patterns found on competitive
color mark sensors. The R55 includes four M5 x 0.8 x 6 mm stainless steel cap screws and a hex key wrench.
The R55 focus is located at 10 mm (0.39") ahead of the lens surface. The R55 must be mounted within 3 mm (0.12") of this
distance from the surface of the material for reliable sensing (Figure 3).
Consider the following when mounting the R55:
1) When sensing a color mark on a reflective (shiny) material,
mount the R55 at an angle which places the lens centerline at
approximately 15º off perpendicular to the material’s surface (see
Figure 4b). This “skew angle” will minimize strong direct
reflections (which tend to overwhelm the sensor), and allow the
sensor to discern the relatively small optical contrast offered by
difference in colors.
2) Clear materials are poor reflectors of light. When sensing a mark
printed on a clear material (e.g., a clear poly web), position a
reflective surface directly behind the clear material which will
return light to the R55. The printed mark, regardless of its color,
then becomes the dark condition, as it blocks the light from
reaching the reflective surface. Most clear materials are also shiny;
it is important also to include a 15º skew angle when sensing clear
materials (Figure 4b).
3) Whenever possible, it is a good idea to sense a web material at a
location where it passes over a tension bar or roller, to minimize
the adverse affects of web “flutter” or sag (Figure 4a).
Lens
Cap
10 ± 3 mm
Cap
Surface of
Material
Lens
10 ± 3 mm
90º
Roller or Tension Bar
Opaque, Non-reflective
Web Material
Focus Distance
10.0 mm (0.39 in)
R55
Mount the R55 Perpendicular to
non-reflective (matte) materials
Approximately 15º
Focus Distance
10.0 mm (0.39 in)
Mount the R55 at approximately 15º from perpendicular to
transparent and opaque reflective materials
Roller or
Tension Bar
Transparent or
Opaque Reflective
Web Material
R55
Figure 3. R55 Lens Positions
Figure 4a. Mounting for sensing opaque non-reflective
materials
Figure 4b. Mounting for sensing opaque reflective and
transparent materials
Lens Location
Mounting