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Unread 05-02-2017, 10:39
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Re: E4T Encoder Help

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Originally Posted by GeeTwo View Post
+1 ? WT?
This is standard for this sort of encoder. They made a cable that goes to two three pin pwm connections, so one cable provides power and ground to the encoder and the second connection is needed only for the second signal wire.
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Unread 05-02-2017, 14:03
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Re: E4T Encoder Help

So from what I can tell, your DIO 6 (channel B) seems to be disconnected. Connect up a multimeter (or a oscilloscope if you're feeling fancy) and see if you can get a signal anywhere on the wire (at the connector to the encoder, solder joint to the board). From there you can figure out which portion you need to replace.
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Unread 07-02-2017, 22:21
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Re: E4T Encoder Help

Thanks for the suggestions everyone. Unfortunately, nothing we tried solved the problem. The encoder still inconsistently oscillates between 0-n*0.25 where n is the number of ticks/rev set in the code.

Here's what we tried:
  1. Resoldering the connections to eliminate any possibility of faulty wiring
  2. Setting the ticks/revolution in the code among other parameters specified in WPI Screensteps
  3. Switching the wiring to see if the oscillation jumped pins (it did)
  4. Reading the raw output of the encoder

Sadly, nothing we tried got us usable values from the encoder. I guess this means our encoder itself is busted. My advice for anyone reading this thread in the future is to be extra careful when assembling the optical encoders and avoid touching the sensor as much as possible. Thanks again for the help!
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Unread 07-02-2017, 22:49
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Re: E4T Encoder Help

Quote:
Originally Posted by DIyer5465 View Post
Thanks for the suggestions everyone. Unfortunately, nothing we tried solved the problem. The encoder still inconsistently oscillates between 0-n*0.25 where n is the number of ticks/rev set in the code.

Here's what we tried:
  1. Resoldering the connections to eliminate any possibility of faulty wiring
  2. Setting the ticks/revolution in the code among other parameters specified in WPI Screensteps
  3. Switching the wiring to see if the oscillation jumped pins (it did)
  4. Reading the raw output of the encoder

Sadly, nothing we tried got us usable values from the encoder. I guess this means our encoder itself is busted. My advice for anyone reading this thread in the future is to be extra careful when assembling the optical encoders and avoid touching the sensor as much as possible. Thanks again for the help!
did you use all the little spacer tools when installing the encoder to the shaft? alignment is very important. it's also easy to damage the little glass disk. Also verify the cover of the encoder is fully snapped down, one of my students failed to fully snap it down once, and the difference is subtle (you should hear two clicks when installing).

if you take the cover off (carefully) and post a picture (in focus), we can look to see if it looks an installation error.
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