analog 0-10 volt putting out 24v <resolved>

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jimw
Posts: 17
Joined: Thu Apr 16, 2020 4:47 pm
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analog 0-10 volt putting out 24v <resolved>

Post by jimw »

I wish to use the acorn board to control a VFD. I have run the CNC12 utility to calibrate the 10v output. s1000 = 33v s1500 = 5v etc. no problem. My concern is that until I start the spindle the analog output is 24v. I am reluctant to put 24v onto what is expecting 10v. What am I missing? Report attached.
ShawnM
Posts: 2190
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Location: Clearwater, FL

Re: analog 0-10 volt putting out 24v

Post by ShawnM »

Hi Jim, we need to know more about the VFD and post a link to the VFD manual so we can help. Start a Google album and share pics of the current wiring and components. We need much more info to help you. Are you saying the Acorn is putting out 24 volts on the analog output?
jimw
Posts: 17
Joined: Thu Apr 16, 2020 4:47 pm
Acorn CNC Controller: Yes
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CNC12: Yes
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Re: analog 0-10 volt putting out 24v

Post by jimw »

yes the Acorn board is outputing 24v on the 10v analog connection lugs.
cnckeith
Posts: 7164
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Re: analog 0-10 volt putting out 24v

Post by cnckeith »

jimw wrote: Thu Mar 30, 2023 11:00 pm yes the Acorn board is outputing 24v on the 10v analog connection lugs.
post a link to the VFD manual so we can help. Start a Google album and share pics of the current wiring and components
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
jimw
Posts: 17
Joined: Thu Apr 16, 2020 4:47 pm
Acorn CNC Controller: Yes
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CNC Control System Serial Number: 1862E483DECF-0403203102
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CNC12: Yes
CNC11: No
CPU10 or CPU7: No

Re: analog 0-10 volt putting out 24v

Post by jimw »

Here is the manual for my VFD. I still think the problem is with the Acorn board. Where does the 10v come from? Somewhere i read that it can also pot out 0-5v. Is this true? I will send pictures if necessary.

Thanks,
Jim

https://www.tecowestinghouse.com/Manual ... manual.pdf
Nigelo
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E415F6F70BC3-0318203049
98F07B91FC6B-0123236802
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Location: UK

Re: analog 0-10 volt putting out 24v

Post by Nigelo »

How are you measuring 24v? With the VFD connected to the analog Vout / Gnd terminals or with nothing connected other than your voltmeter? In the former case your wiring is suspect.

Don't forget to post the report.zip as requested above
"You can lead a horse to water but you cannot force it to drink"
Hope this helps
Nigel
ShawnM
Posts: 2190
Joined: Fri May 24, 2019 8:34 am
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CNC12: Yes
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Location: Clearwater, FL

Re: analog 0-10 volt putting out 24v

Post by ShawnM »

As Nigelo stated, measure the voltage on the analog outputs with NOTHING hooked to them other than your multimeter.

As for your VFD, you should be connected to AGND and AVI for the 0-10v signal from Acorn.

This is why we ask for pics and/or diagrams of how you wired it. Without more details we are just guessing. Please start a Google album and share a link here with us. This way ALL your pics are in ONE location.
Ken Rychlik
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Re: analog 0-10 volt putting out 24v

Post by Ken Rychlik »

99% of the time it is operator error on wiring or programming. That is why pics of "(I hooked up this yellow wire in this picture of the board to this pin of the vfd)" with pics of both items. Folks will help you troubleshoot it, but they can't do it blindfolded.

Hopefully your top post here was a typo and you didn't tell it to send 33 volts.
Ken
jimw
Posts: 17
Joined: Thu Apr 16, 2020 4:47 pm
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CNC12: Yes
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Re: analog 0-10 volt putting out 24v

Post by jimw »

First I wish to thank you for your assistance so far. I have attached pictures of my set up. I guess I neglected to point out that I have not connected the 10v to anything but my meter. I have a four conductor shielded wire using black and white on 10v on the board. The other ends are hooked to my meter. As you can see from the pictures I am getting 24+v. I am sure it is my fault but what? And yes the 33v was meant to be 3.3v.


thanks,
jim
Attachments
IMG_0181.jpg
IMG_0177.jpg
IMG_0188.jpg
IMG_0188(1).jpg
ShawnM
Posts: 2190
Joined: Fri May 24, 2019 8:34 am
Acorn CNC Controller: Yes
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Oak CNC controller: No
CNC Control System Serial Number: 7804734C6498-0401191832
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Clearwater, FL

Re: analog 0-10 volt putting out 24v

Post by ShawnM »

Look closer at your meter, it reads 24.9 millivolts.
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