Incremental Encoder MMS

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5 years 5 months ago #209895 by DC67
Incremental Encoder MMS was created by DC67
Hello
I installed an incremental Encoder for an MMS. After connecting it to the encoder of the MESA7i76e, I was able to call it up in the HAL show, but it doesn't count correctly. What do i have to change? see pictures + video

https://ibb.co/R3qc31r
https://ibb.co/CMSy7H9

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5 years 5 months ago #209903 by PCW
Replied by PCW on topic Incremental Encoder MMS
You have the encoder mis-wired, looks like
A --> A
/A --> B

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5 years 5 months ago #209905 by DC67
Replied by DC67 on topic Incremental Encoder MMS
Ok i will check this out

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5 years 5 months ago #209918 by DC67
Replied by DC67 on topic Incremental Encoder MMS
I couldn't find any fault now. Cabling from encoder to Mesa looks like this (pictures)

Attachment not found


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5 years 5 months ago #209925 by PCW
Replied by PCW on topic Incremental Encoder MMS
Isn't pin D supposed to be the common?

Also make sure the7I76E encoder inputs are jumpered for single ended (TTL) mode

No pullup resistors are needed in single ended mode (they are built into the 7I76E)

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5 years 5 months ago #209931 by DC67
Replied by DC67 on topic Incremental Encoder MMS
this is the circuit diagram. did i make a mistake here?

Attachment not found

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5 years 5 months ago #209932 by PCW
Replied by PCW on topic Incremental Encoder MMS
Yes as I read it, terminal D should be the ground

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5 years 5 months ago #209934 by DC67
Replied by DC67 on topic Incremental Encoder MMS
sorry i had overlooked that when drawing in the cable that the blue cable in the photo from the MESA (ground) is connected to pin D.

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5 years 5 months ago #209937 by PCW
Replied by PCW on topic Incremental Encoder MMS
OK so is the 7I76E encoder jumpered for TTL mode?

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5 years 5 months ago #209942 by DC67
Replied by DC67 on topic Incremental Encoder MMS
I have now removed the resistors that I would not have needed at all, as I found out, the jumpers were already on TTL. Then I turned the rotary encoder again only in one direction (to the right). You can see that it counts from 0 to -1 and then +1 in the video. He then always repeats the whole thing.

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