2.2.3. H&V moving unit
This unit contains slides to move the sample sampling needle in Horizontal and Vertical
directions, two stepper motors, XYR opto board, opto wheel, washing head and the sampling
needle. It moves the needle to the desired position: from sampling position, to washing head,
and to the measuring chamber.
Both stepper motors have optical end-switch sensors for detecting these positions. These
are required for correct initialization and error detection. All sensors have status LEDs to
show actual conditions.
The Vertical motor works with a special opto wheel for detecting home & end positions. See
the Adjustment section of this manual to place this wheel to the proper position.
Greasing of the horizontal/vertical guiding rods should be done regularly using
“Photolube” (A598), a PTFE-based thin lubricant.
It is recommended to check and repeat greasing of guiding rods every year, or after
10000 measurements.
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