On Wed, 29 Jan 2025, Sam Sokolik wrote:
Date: Wed, 29 Jan 2025 17:41:45 -0600
From: Sam Sokolik <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: Re: [Emc-users] 7i97 issue with pwmgen.04
ugh - I had mouse pads..
Anyway - I did some testing.
If you set 'setp hm2_7i97.0.pwmgen.04.enable.invert_output true'
the output instantly goes to -10v
When you enable the pwmgen - then it goes to 10v..
It works normally if you don't invert the enable.
It does invert the enable though (this drive needed an inverted enable to
work)
sam
Yeah, you cannot do that (invert the enable) on a 7I97/7I97T/7I36 as the PWM
enable also effects the analog circuitry. It also would enable your drive
(OPTO off) on a watchdog bite or at power up.
Probably need to use an external relay or form B opto
On Wed, Jan 29, 2025 at 5:11??PM Sam Sokolik <[email protected]> wrote:
On Wed, Jan 29, 2025 at 9:56??AM Sam Sokolik <[email protected]> wrote:
I thought that inverted the enable output? (I mean - it worked for this
drive...) The reason I switched to the 4th pwm is that the enable is
separated compared to 0-3..
sam
On Wed, Jan 29, 2025 at 9:53??AM andy pugh <[email protected]> wrote:
On Wed, 29 Jan 2025 at 14:28, Sam Sokolik <[email protected]> wrote:
> setp hm2_7i97.0.pwmgen.pdm_frequency 75000
> setp hm2_7i97.0.pwmgen.00.offset-mode TRUE
> setp hm2_7i97.0.pwmgen.00.output-type 1
> setp hm2_7i97.0.pwmgen.04.output-type 1
> setp hm2_7i97.0.pwmgen.04.offset-mode TRUE
> setp hm2_7i97.0.pwmgen.04.enable.invert_output true
> #setp hm2_7i97.0.pwmgen.00.enable true
> what am I doing wrong?
The obvious difference is the "invert output"
What happens without that?
--
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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Peter Wallace
Mesa Electronics
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