Cursor

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Contents

The cursor project is an ElN project done at the end of the first semester. It consists in driving a DC motor which moves the cursor chariot with the help of a screw.

Cursor in Action

Components

The system consists of

Power circuit

The chariot DC motor is powered with 12 V. The power circuit contains an H-bridge controlled by digital signals. On the power board, a 5 V regulator generates the proper voltage for powering the FPGA board.

DC motor

The DC motor is controlled by a L6207 H-bridge driver.

Encoder

The angle of the screw can be measured with the help of an incremental encoder module. The model used on the assembly is a AEDB-9140-A12, which has 500 Counts Per Revolution (CPR).

Toplevel Design

There is a Empty and a Demo Toplevel Design. the Empty for the Students to create their own system and the Full is our example.

Specification

  • On reset the cursor moves to the end of the chariot
  • By pressing the pos 1 button the cursor need to move to position 1 with an acceleration and deceleration phase
  • By pressing the pos 2 button the cursor need to move to position 2 with an acceleration and deceleration phase
Position Range Diagram

Get the source svg here.

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