How to use a differential encoder with an arduino?

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1

I'm trying to use a Mega 2560 r3 to interface with multiple E5-1000-276-EN-D-D-D-1 US Digital encoders which have both the + and - signals as different pins. Is there a way I can wire this up to my aurduino shield using just interrupt pins and jumper cables, or do i need something to adapt the signals to single level (10pin to 5 pin) first to do that? Any help would be greatly appreciated.

2

Please give a link to the encoder documentation.

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3

See https://www.usdigital.com/datasheets/E5-Datasheet.pdf

The D option indicates differential (+/-) line driver outputs, for long distance communications in noisy industrial environments. Best to use line receiver ICs for those.

Check the U.S. Digital product page for wiring and application notes.

4

Hi, @firehawk4427
Welcome to the forum.

Can you please tell us what your project is?
That way we can provide relevant answers.

Thanks... Tom.... :smiley: :+1: :coffee: :australia:

5

From the way I read the data sheet you should be able to use the A+/B+ or A-/B- pair just as you would the A/B signals from a single ended (not differential) encoder.

6

According to this post, using just A+ and B+ works with Arduino. I've never had one to try.

7

You can check the datasheet. They usually contain examples.

8

Do you have noisy environment? And long wiring between the encoder and your Arduino?

If so, you need some additional hardware that has the differential pairs A+/A- and B+/B- as input signal and does the conversion into single-ended A and B signals. It will be two times the same circuit.
If not, either use A+ and B+, or A- and B-. There are both TTL if I understood the data sheet correctly, so both signals have to be just the same type (either '+' or '-')

9

Connect A+ and B+ to Arduino input pins and set pinMode to INPUT_PULLUP, connect A- and B- to GND through 4.7k resistors.

10

This is a pretty standard encoder type ( its optical ).

It is a Quadrature Rotary Encoder.

As said before, Us A+ & B+ connect to relevant pins.

Use the encoder.h library

Its a good encoder, but make sure you have the encoder disk running on centre or you will get some odd readings

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