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Chapter 9 Setup
9–11
(2) Feedback direction of linear scale
The linear scales include the AT342 scale and Heidenhain scale, etc. The feedback direction of
the AT342 scale is shown below. When moved to the left, looking from the direction with the
detector head facing downward and the AT342 display facing forward, the feedback moves in the
plus direction. When moved in the opposite direction, the position moves in the minus direction.
The plus/minus directions of the Heidenhain scale are the opposite of the AT342 scale.
AT342 scale unit
Plus direction Minus direction
Detection head
Signal cable
Scale unit body
Heidenhain scale unit
Minus direction Plus direction
Detection head
Signal cable
Scale unit body