Installation

Install the Lens

The lens may be installed at either of two lens ports (see Figure 2 on page 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.

Note: The lens port cap must be installed on the unused port for reliable operation. Fully seat the lens cap to ensure

a liquid-tight seal.

Mounting Considerations

The R58 Expert includes a total of eight size M5 threaded holes used for mounting. These threaded holes are positioned to match the

mounting hole patterns common to other registration mark sensors. The R58E includes four M5 x 0.8 x 6 mm stainless steel cap screws

and a hex key wrench.

The R58E focus is 10 mm (0.39 in) from the lens surface. The R58E must

be mounted within 3 mm (0.12 in) of this distance from the surface of the

material for reliable sensing (Figure 2 on page 3).

Consider the following when mounting the R58E:

• When sensing a registration mark on a reflective (shiny) material,

mount the R58E at an angle which places the lens centerline at

approximately 15° off perpendicular to the material’s surface

(Figure 4 on page 3). This minimizes strong direct reflections

(which tend to overwhelm the sensor), and allows the sensor to

discern the relatively small optical contrast offered by differences

in colors.

• Clear materials are poor reflectors of light. When sensing a mark

printed on a clear material (for example, a clear poly web),

position a reflective surface directly behind the clear material to

return light to the R58E. 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 to include a 15° skew angle when sensing

clear materials (Figure 4 on page 3).

• Whenever possible, sense a web material at a location where it

passes over a tension bar or roller, to minimize the adverse

effects of web “flutter” or sag (Figure 3 on page 3).

Cap

Lens

10 ± 3 mm

Lens

Cap

10 ± 3 mm

Surface of

Material

Figure 2. Mounting Distance and Lens Positions

90º

Roller or

Tension Bar

Opaque,

Non-reflective

Web Material

Focus Distance

10.0 mm (0.39")

Sensor

Mount the sensor perpendicular to

non-reflective (matte) materials

Figure 3. Mounting for Matte Material

Focus Distance

10.0 mm (0.39")

transparent and opaque reflective materials

Roller or

Tension Bar

Transparent or

Opaque Reflective

Web Material

Sensor

Figure 4. Mounting for Transparent and Opaque Material

P/N 122928 Rev. D

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