Rockwell Automation 2755-L7, -L9 Scanners - Manual (Page 35)

Chapter 6
Maintenance and Troubleshooting
6–3
Do not use abrasive materials, such as disposable paper wipes, to clean the
plastic scan window. Most disposable wipes, or paper towels, use glass
fibers which will scratch and cloud the window. Instead, use the following
materials:
Air: Optics rated clean air
Solvent: Optics rated cleaning solution for use on coated lenses
Wipe: Optics quality lens cleaning paper and cotton–tipped swabs.
Use the following procedure to clean the glass scan window:
!
CAUTION: Do not use organic solvents or abrasive materials,
such as disposable paper wipes, to clean the plastic scan window.
In most cases, they contain glass fibers that will scratch and cloud
the window.
Step 1 Turn the decoder OFF.
Step 2 Check that the PWR ON indicators on both the decoder and scan head
are OFF.
Step 3 Use the lens cleaning paper to wipe any dust or foreign material from
the window. Be careful not to scratch the window with any grit that might be
on the window.
Step 4 Dust off the scan window and adjacent areas with optics rated air.
Step 5 Remove the scan window. Figure 6.1 illustrates the removal.
!
CAUTION: Do not touch the internal mirrors! Smudge from
finger prints will diffuse the beam.
Step 6 Clean the window using the optics rated cleaning solution,
cotton–tipped swabs and lens cleaning paper. To avoid smearing film and
fingerprints, rotate the cotton–tipped swab, while it’s on the glass, nearly one
full turn. Then, discard it.
Step 7 Replace the scan window.
Step 8 Turn the decoder ON. The PWR ON indicators on both the decoder
and scan head should be ON.
When the window is clean, you will barely be able to see the reflection of the
laser beam on the clear glass.
Cleaning the Plastic Window