7i76E daughter card compatability
- larry_no11
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13 Mar 2018 18:10 #107288
by larry_no11
7i76E daughter card compatability was created by larry_no11
Hello,
I have a 7i76E (currently driving my 3 axis mill), and I would like to add 3 encoders to my steppers (so I don't lose steps).
As far as I understand, I need to get a daughter card for the extra encoder inputs. However, I am a bit lost which daughter cards are compatible.
Would either of these cards work:
7i85
7i52
And if they do, would I connect them to the 26 pin expansion on the 7i76E?
Thanks,
Larry
I have a 7i76E (currently driving my 3 axis mill), and I would like to add 3 encoders to my steppers (so I don't lose steps).
As far as I understand, I need to get a daughter card for the extra encoder inputs. However, I am a bit lost which daughter cards are compatible.
Would either of these cards work:
7i85
7i52
And if they do, would I connect them to the 26 pin expansion on the 7i76E?
Thanks,
Larry
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- Todd Zuercher
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13 Mar 2018 18:39 #107289
by Todd Zuercher
Replied by Todd Zuercher on topic 7i76E daughter card compatability
You would use a 7i85 (or 7i85s) and connect it to the 26 pin expansion port with something like this.
www.ebay.com/itm/DB25-Male-to-26-Pin-2x1...4:g:makAAOSwZqZaLekO
www.ebay.com/itm/DB25-Male-to-26-Pin-2x1...4:g:makAAOSwZqZaLekO
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- DanMN
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13 Mar 2018 19:04 - 13 Mar 2018 19:05 #107292
by DanMN
Replied by DanMN on topic 7i76E daughter card compatability
I've considered something similar, and was hoping I could do it on the 7i76e without a daughter card. I know you can repurpose the spindle encoder channel on the 7i76e -- and I was hoping I could use the MPG encoder inputs. That would be 3 axes if it worked. I'm guessing your research indicated it doesn't -- or are you running a pendant and using them already?
Last edit: 13 Mar 2018 19:05 by DanMN.
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- Todd Zuercher
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13 Mar 2018 19:18 #107293
by Todd Zuercher
Replied by Todd Zuercher on topic 7i76E daughter card compatability
The MPG inputs might not be fast enough, and there are probably other reasons they are not suitable for positioning.
It is possible to use the bare pins from the expansion ports with the right firmware loaded, but you will be limited to TTL signals for your encoder inputs.
It is possible to use the bare pins from the expansion ports with the right firmware loaded, but you will be limited to TTL signals for your encoder inputs.
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