4. Start moving the web past sensor. Present at least 2 marks.

5. End the dynamic sampling.

Method

Action

Result

Push Button

Press the TEACH button.

Sensor evaluates contrast.

If adequate mark to background contrast, the sensor

returns to normal operation using the new sense

settings.

If not, the Output Configuration and Emitter Color

Configuration LEDs will alternately flash 4x to

indicate that the TEACH failed and the sensor will

return to normal operation without changing the

sense settings.

Remote Input

Single-pulse the remote line to end Dynamic sampling.

Installation Instructions

Mounting Considerations

The R58B Registration Mark Sensor 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 R58B includes four M5 x 0.8 x 6 mm stainless steel cap screws and a hex key

wrench.

The R58B focus is 10 mm (0.39 in) from the lens surface. The R58B 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 4).

Consider the following when mounting the R58B:

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

the R58B at an angle which places the lens centerline at approximately 15°

off perpendicular to the material’s surface (Figure 4 on page 4). 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 R58B. 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 4).

• 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 4).

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

R58B Registration Mark Sensor

4

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