On Mon, 28 Feb 2022, gene heskett wrote:
Date: Mon, 28 Feb 2022 20:11:35 -0500
From: gene heskett <ghesk...@shentel.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Subject: [Emc-users] Q for Peter?
Greetings Peter;
The 7i76 has, I recall reading, the ability to do analog to digital
conversions on the first 4 of its inputs. But the full scale range is 36
volts if I recall right. I don't recall the bit range, though, whether
its 8 bit, or 16.
Would it be possible to lower the full scale range to 0-5 volts with a
firmware change?
I have acquired a couple pressure sensors rated at 0-10 psi with a 5 volt
input, .5 to 4.5 volt outbut and want to use them to monitor, and control
the speed by pwm means as the mister(s) only need 3 or 4 psi to do their
job if the nozzle is close enough to the cutting face. Inch or so.
Thanks Peter, take care and stay well.
Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
Not with firmware but you could replace the low side resistor network on the
first 4 inputs with say 22K (was 1.8K) to get about a 5V full scale range
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Mesa Electronics
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