Magnetic Encoder Pair Kit with Side-Entry Connector - Pololu USA

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  • Part No :
  • MOT-3230
  • Availability:
  • In Stock
  • Shipping :
  • Same Day
  • Weight:
  • 0.085Kg
  • Made By:
  • Pololu - USA
  • Mfr.Part.No:
  • 4761
  • Quality Rank:
  • 95/100
Rs 539
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Rs 636
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Add quadrature encoders to your micro metal gearmotors (extended back shaft version required) with this kit that uses a magnetic disc and Hall effect sensors to provide 12 counts per revolution of the motor shaft. The sensors operate from 2.7 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit. These encoders have a side-entry, 6-pin male JST SH-type connector.This module is compatible with all of the dual-shaft pololu micro metal gearmotors.

This kit includes two dual-channel Hall effect sensor boards and two 6-pole magnetic discs that can be used to add quadrature encoding to two micro metal gearmotors with extended back shafts (motors and cables are not included with this kit). The encoder board senses the rotation of the magnetic disc and provides a resolution of 12 counts per revolution of the motor shaft when counting both edges of both channels. To compute the counts per revolution of the gearbox output shaft, multiply the gear ratio by 12. This compact encoder solution fits within the 12 mm × 10 mm cross section of the motors on three of the four sides, and it extends 4.2 mm past the edge of the fourth side.The encoders include a side-entry, 6-pin male JST SH-type connector.

Specifications:

  • Minimum operating voltage:    2.7 V
  • Maximum operating voltage:    18 V
  • Connector:    side-entry, 6-pin male, JST SH-type

Cable options:

Two types of cables with matching JST SH-style connectors that can be used with these encoders.

  • Single-ended cables, with a connector on one end and unterminated wires on the other end.
  • Twisted female-female cables with connectors on both ends.
  • These double-ended cables can be used with JST SH-style connector breakout boards (available in top-entry and side-entry versions) to easily access the motor and encoder pins on a standard solderless breadboard.

Pinout and installation:

The encoder board is designed to be soldered directly to the back of the motor, with the back shaft of the motor protruding through the hole in the middle of the circuit board. One way to achieve good alignment between the board and the motor is to tack down the board to one motor pin and to solder the other pin only when the board is flat and well aligned. Be careful to avoid prolonged heating of the motor pins, which could deform the plastic end cap of the motor or the motor brushes. Once the board is soldered down to the two terminals, the motor leads are connected to the M1 and M2 connector pins as labeled below, and they can be accessed via the red and black wires when used with our corresponding JST cables. The remaining four connector pins are used to power the sensors and access the two quadrature outputs.


The sensors are powered through the VCC (blue wire) and GND (green wire) pins. VCC can be 2.7 V to 18 V, and the quadrature outputs A and B (yellow and white wires) are digital signals that are either driven low (0 V) by the sensors or pulled to VCC through 10 kO pull-up resistors, depending on the applied magnetic field. The sensors’ comparators have built-in hysteresis, which prevents spurious signals in cases where the motor stops near a transition point.


Comparison to previous version:

This encoder version is a modification of the previous version that adds a connector to enable the use of removable cables. The basic schematic is unchanged, and the electrical performance is identical.

Notemotors and cables are not included with this kit

Package Includes:

  • 1x Magnetic Encoder Pair Kit with Side-Entry Connector for Micro Metal Gearmotors, 12 CPR, 2.7-18V
  • 2x 6-pole magnetic discs

Documents / Downloads:

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Magnetic Encoder Pair Kit with Side-Entry Connector - Pololu USA