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Determining décimal points
The following table shows the digital point principle of the digital indicators. For example, to obtain the reading "10.0", the indicator must count "100" with the decimal place 1 after the first rotation. During series production, the decimal point is marked by a colored intermediate ring. SIKO deals with the relationship between the spindle pitch and decimal point as fol-lows: The spindle pitch serves as a reference. If this is 4 mm, the gear unit is designed so that 4.0 appears on the display after the first rotation.
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Sense of rotation
The sense of rotation of the axis influences the gear unit in-stalled in the digital indicator. Digital position indicators are available in two directions of rotation in relation to the machine axis:
"i" stands for clockwise
"e" stands for counter-clockwise
Ascending values are shown on the display in accordance with the "i" and "e" ordering code.
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"+" shows the direction of rotation of the respective machine shaft. The ordering codes "e" and "i" specify in which direction of rotation the increasing values appear on the display.
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Mounting position
Two factors determine this ordering code:
a) The orientation of the machine shaft
b) The line of vision to the window (decades)
The number and orientation of the digital indicator window and the visible decades are determined with a numeric code (e.g., 02, 04, etc.).
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Orientation aid for the counting direction
The "direction arrow" can be printed on the DA04 and DA09S models as an option. Combined with "+" and this shows clearly in which direction of rotation of the shaft/spindle the decades are increased or decreased [Fig. 1]. Printing is not available on black housings.
Axial seal
When axial seals are used [Fig 2], the set screw should not pro- 1
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trude over the shaft surface. Please screw in until it is flush; if necessary provide a recess in the shaft.
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