are you familiar with
https://ieeexplore.ieee.org/document/7151256
full text here:
https://annas-archive.org/search?index=journals&q=%22doi:10.1109/I2MTC.2015.7151256%22
On 11/11/2025 01:53, [email protected] wrote:
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Today's Topics:
1. Re: Questions about Mesa cards (Leonardo Marsaglia)
2. Re: Questions about Mesa cards (andy pugh)
3. Re: Questions about Mesa cards (Leonardo Marsaglia)
4. Re: Questions about Mesa cards (Leonardo Marsaglia)
----------------------------------------------------------------------
Message: 1
Date: Mon, 10 Nov 2025 14:28:55 -0300
From: Leonardo Marsaglia <[email protected]>
To: "Enhanced Machine Controller (EMC)"
<[email protected]>
Subject: Re: [Emc-users] Questions about Mesa cards
Message-ID:
<cadbxzvptuupp5vhtnm0u6zihdhuifcaa8w-bp5vy0xojpbv...@mail.gmail.com>
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What are you using to convert the output of the LVDT to frequency?
I was hoping to use something like this to drive the LVDT:
https://www.analog.com/media/en/technical-documentation/data-sheets/ad598.pdf
And then convert the voltage output from the AD598 to frequency using a 555
timer. I don't have all of this figured out yet, that's why I'm still
defining which boards to use. But for some reason I feel more
comfortable using the encoder inputs as counters.
El lun, 10 nov 2025 a las 13:34, andy pugh (<[email protected]>) escribi?:
On Mon, 10 Nov 2025 at 16:06, Leonardo Marsaglia <[email protected]>
wrote:
Also, the encoder reading on mesa cards is super fast and reliable so I'm
confident that it will work as I plan.
What are you using to convert the output of the LVDT to frequency?
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
? George Fitch, Atlanta Constitution Newspaper, 1912
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Message: 2
Date: Mon, 10 Nov 2025 19:33:18 +0000
From: andy pugh <[email protected]>
To: "Enhanced Machine Controller (EMC)"
<[email protected]>
Subject: Re: [Emc-users] Questions about Mesa cards
Message-ID:
<CAN1+YZWMPqsea_gZZGrnhYEY11AkE3yn=ekzjev0aokyfmh...@mail.gmail.com>
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On Mon, 10 Nov 2025 at 17:32, Leonardo Marsaglia <[email protected]> wrote:
https://www.analog.com/media/en/technical-documentation/data-sheets/ad598.pdf
That seems like a reasonable choice.
And then convert the voltage output from the AD598 to frequency using a 555
timer.
I think that this part is not the best way, an analogue output voltage
would be best measured directly by an ADC, and is likely to offer
better repeatability than a 555 timer circuit.
The 7i87 is s smart-serial card, and three of them could connect to
the 7i74 you were considering.
What's the machine? LVDTs and RDVTs are interesting and precise, but
somewhat old-fashioned.
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