# Through Bore Encoder V1

The REV Through Bore Encoder is designed with the end user in mind, allowing teams to place sensors in the locations closest to the rotation they wish to measure. This rotary sensor measures both relative and absolute position through its ABI quadrature output and its absolute position pulse output.

<figure><img src="https://1166281274-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-ME3KPEhFI6-MDoP9nZD%2Fuploads%2FUJMkTeJq1bK7IRud6vpH%2Fimage.png?alt=media&#x26;token=c07c2197-b109-4803-883f-bb5bb96bcc00" alt=""><figcaption></figcaption></figure>

### Features

* Incremental and absolute magnetic encoder
  * Built-in magnet
  * Quadrature output - A, B, and Index
  * Absolute output - Pulse Width (Duty Cycle)
  * Broadcom AEAT-8800
* Factory-calibrated zero-position
  * Zero calibrated to notch in case
* Through-bore design
  * Easily mounted to any shaft
  * Bore inserts
    * 1/2" Hex (default)
    * 3/8" Hex
    * 5mm Hex
    * 1/4" Round
* Mounting holes
  * Hole spacing matches common FRC gearboxes and chassis

{% hint style="warning" %}
The FTC Control System currently only supports Incremental Encoder input through the motor encoder ports. Absolute pulse input is not supported.
{% endhint %}

{% hint style="danger" %}
**Do not disassemble the sensor.** Disassembling the Through Bore Encoder will dereference the zero position with the physical case notch. It is not possible to recalibrate the zero position as it is permanently saved inside the sensor at the factory
{% endhint %}

### Kit Contents

|                       Part Number                       | Description                                       | Qty |
| :-----------------------------------------------------: | ------------------------------------------------- | :-: |
| [REV-11-1271](https://www.revrobotics.com/rev-11-1271/) | Through Bore Encoder                              |  1  |
|                            -                            | 3/8" Hex Insert                                   |  1  |
|                            -                            | 5mm Hex Insert                                    |  1  |
|                            -                            | 1/4" Round Insert                                 |  1  |
| [REV-11-1275](https://www.revrobotics.com/rev-11-1275/) | JST-PH 6-pin to JST-PH 6-pin Cable                |  1  |
| [REV-11-1817](https://www.revrobotics.com/rev-11-1817/) | JST-PH 6-pin to 4 x 3-pin 0.1" (PWM/Dupont) Cable |  1  |
| [REV-31-1815](https://www.revrobotics.com/rev-31-1815/) | JST-PH 6-pin to JST-PH 4-pin Cable                |  1  |