Troubleshooting The Encoder; Cleaning; Transportation - THORLABS MAX200 Manual

Chapter 4 Installation

4.3 Troubleshooting The Encoder

The green Power/Calibration indicator will not come on.
Ensure that the SmartSignal electronics' 15-pin D-sub connector is fully seated and
connected.
The green, 'Proper Alignment' indicator doesn't stay illuminated over the full length of
travel.
Verify that the mid point of the actuator travel has been correctly aligned to the
midpoint of the stage travel.
Ensure that the encoder scales are clean over their entire length - see Section 4.4.
The green Power/Calibration indicator is flashing.
The 'SmartSignal electronics' Index/Calibration process is activated by pressing the
recessed button in the SmartSignal electronics' connector body. When this button is
pressed, the Power/Calibration LED will flash until the internal sensor passes over the
midpoint of the stage at least once in each direction.

4.4 Cleaning

To ensure trouble free operation, periodic cleaning of the encoder scales is advised.
Frequency depends upon usage and environment.
1) Invert the stage, and push the moving platform to one end of its travel. Part of the
encoder scale is now accessible.
2) Blow off any loose particles with an aerosol air duster. Pay particular attention to
the unexposed portion of the scale.
3) Move the platform to its opposite end of travel and repeat item (2).
4) If problems persist, the scale may be cleaned with an optical wipe, dampened with
isopropyl alcohol or acetone. Use only products described as 'suitable for cleaning
optical components'. These can be obtained from stockists such as RS
Components. Do not scrub the scale.

4.5 Transportation

Caution. When packing the unit for shipping, use the original packing. If this is not
available, use a strong box and surround the unit with at least 100 mm of shock
absorbent material.
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