Acorn Encoder Signal and Power

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gurubikes
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Acorn Encoder Signal and Power

Post by gurubikes »

Hi,

Does Acorn Encoder (Connector P10) can accept only four signals : A+, A-, B+ and B- without Z+ and Z- ?

What is the Max current (mA) that the pin 9 of the connector P10 can supply the external encoder ?

Thank You for help

Gregory
cnckeith
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Re: Acorn Encoder Signal and Power

Post by cnckeith »

gurubikes wrote: Thu Mar 22, 2018 1:41 pm
Does Acorn Encoder (Connector P10) can accept only four signals : A+, A-, B+ and B- without Z+ and Z- ? << no, please see. viewtopic.php?f=60&t=921>>

Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
metzenw
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Re: Acorn Encoder Signal and Power

Post by metzenw »

gurubikes wrote: Thu Mar 22, 2018 1:41 pm What is the Max current (mA) that the pin 9 of the connector P10 can supply the external encoder ?
Old post, but figure better to post here than make new.
What is the max amperage draw from the P10 connector? Didn't see anything in the manual.
My encoder draws 300mA, as it's an old encoder from 1978.
Want to make sure this won't hurt the Acorn board.
martyscncgarage
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Re: Acorn Encoder Signal and Power

Post by martyscncgarage »

metzenw wrote: Sat Jan 30, 2021 3:41 pm
gurubikes wrote: Thu Mar 22, 2018 1:41 pm What is the Max current (mA) that the pin 9 of the connector P10 can supply the external encoder ?
Old post, but figure better to post here than make new.
What is the max amperage draw from the P10 connector? Didn't see anything in the manual.
My encoder draws 300mA, as it's an old encoder from 1978.
Want to make sure this won't hurt the Acorn board.
I would not bother with an encoder that old. However, if you would take the time to post the MAKE and MODEL number of the encoder along with a cut sheet we can take a look.
Automationdirect.com sells good encoders reasonably priced.

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
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cnckeith
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Re: Acorn Encoder Signal and Power

Post by cnckeith »

encoder thread. viewtopic.php?f=63&t=921
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
cncsnw
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Re: Acorn Encoder Signal and Power

Post by cncsnw »

Keith,

Where, in the thread that you linked, is the information that gurubikes and metzenw asked for? Specifically, the maximum current or power draw that the Acorn encoder receptacle can supply? I assume it is in there somewhere, or you would not have posted the link; but in a quick scan, I did not see it.
metzenw
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Re: Acorn Encoder Signal and Power

Post by metzenw »

Ok, I got some information on it.

The ACORN is intended to supply around 50mA that is typical of most encoders.

The encoder is supplied by the 5V 1A regulator that powers the BeagleBone. There should be enough power left over for your encoder now. The problem is that a different processing load may increase the BeagleBone power consumption in the future.

So my higher draw encoder is far from Ideal. To be safe I'd have to power it externally.
cnckeith
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Re: Acorn Encoder Signal and Power

Post by cnckeith »

cncsnw wrote: Sun Jan 31, 2021 7:53 pm Keith,

Where, in the thread that you linked, is the information that gurubikes and metzenw asked for? Specifically, the maximum current or power draw that the Acorn encoder receptacle can supply? I assume it is in there somewhere, or you would not have posted the link; but in a quick scan, I did not see it.
i'll be more clear on the intent of my post. i was suggesting to post on the encoder thread in hopes to keep all encoder related questions and answer in that thread to make it easier for future users to find information. :D the current information has been added to the first post in the thread. happy cnc'ing.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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Location: Mesa, AZ

Re: Acorn Encoder Signal and Power

Post by martyscncgarage »

metzenw wrote: Sat Feb 13, 2021 3:27 pm Ok, I got some information on it.

The ACORN is intended to supply around 50mA that is typical of most encoders.

The encoder is supplied by the 5V 1A regulator that powers the BeagleBone. There should be enough power left over for your encoder now. The problem is that a different processing load may increase the BeagleBone power consumption in the future.

So my higher draw encoder is far from Ideal. To be safe I'd have to power it externally.
Or buy a newer encoder....
I supposed you could loop the +5V and a COM out of the cable feeding the encoder and run it to the Acorn Power Supply +5VDC/Com Terminals
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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