Peel from the case to the element. Follow the readout through this conceptual model.
Drag to rotate; pinch to zoom. With the view focused: arrow keys rotate, + / − zoom, 1–3 choose a layer, Home resets rotation and zoom. Step advances to the next layer; Reset returns to the case and default view. Layer buttons select a view directly. The page does not move on its own.
The enclosure and inner support shown here are teaching examples. The source explains how shaft rotation is read, but does not specify this package cross-section. [Encoder: Theory of Operation]
Teaching view: The dark D-shaped enclosure surrounds a slotted wheel and central hub. The opening gives access to the rotating assembly whose motion the encoder measures.
The enclosure and inner support are simplified teaching examples. The source explains how shaft rotation is read but does not specify this package cross-section. [Encoder: Theory of Operation]
Teaching view: The dark D-shaped enclosure surrounds a slotted wheel and central hub. The opening gives access to the rotating assembly whose motion the encoder measures.
As the slotted wheel turns, its spaces and bars interrupt light between the emitter and detector. [Encoder: Theory of Operation]
Teaching view: The metal wheel has slots around its edge. A light source and lens sit on one side, and a detector sits on the other. The rotating wheel alternately lets light through and blocks it.
The detector electronics produce two pulse signals, A and B, with a timing offset called quadrature. In an ideal worked example, each signal repeats every 4 milliseconds and B follows A by 1 millisecond. That delay is a quarter of the electrical signal cycle, or 90 electrical degrees. [Encoder: Theory of Operation]
Which signal comes first changes when the direction of rotation changes. [Encoder: Definitions / Direction of Rotation]
Teaching view: Photodiodes in the detector produce current when light reaches them through the wheel. As the wheel alternately passes and blocks light, the currents change. The detector electronics turn these changes into the A and B pulse signals.
Explode separates the conceptual layers; X-ray makes the case translucent. External package dimensions follow the model specification; internal teaching geometry is conceptual, not to scale, and is not manufacturer CAD or a wiring diagram.