On Tuesday 08 December 2020 02:04:49 John Dammeyer wrote:
> > I think I'd be measuring the ohmage and inductance of each winding
> > in that motor. A partially shorted winding would be on my suspects
> > list.
> >
> > They should match within a few %. A 10% diff would condemn it in my
> > CET
I found an L290 datasheet. I can see why it would be discontinued. It has
low performance, up to only 20 kHz. Also, most current microcontrollers
have this function on-chip now. Quadrature decoding is so commonly used.
https://www.digchip.com/datasheets/parts/datasheet/456/L290-pdf.php
It
> I think I'd be measuring the ohmage and inductance of each winding in
> that motor. A partially shorted winding would be on my suspects list.
>
> They should match within a few %. A 10% diff would condemn it in my CET
> mind.
>
> Cheers, Gene Heskett
> --
Thanks for the suggestion.
I'll check
On Monday 07 December 2020 23:37:08 John Dammeyer wrote:
> The attached photo is of the last time but this time it's not much
> different. I've resoldered the posts, cleaned everything up including
> polishing the posts and installed a new connector. With only a few
> minutes running the
On Monday 07 December 2020 22:29:51 Jon Elson wrote:
> On 12/07/2020 03:54 PM, Gene Heskett wrote:
> > On Monday 07 December 2020 12:16:35 Jon Elson wrote:
> >
> > And a/o about 13:30 local, I am alone again. My Dee has
> > passed.
>
> So sorry to hear that!
>
> Jon
Thank you Jon.
Cheers, Gene
On Monday 07 December 2020 20:39:32 andrew beck wrote:
> Yep same here Gene.
>
Thank you Andrew.
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)
If we desire respect for the law,
The attached photo is of the last time but this time it's not much different.
I've resoldered the posts, cleaned everything up including polishing the posts
and installed a new connector. With only a few minutes running the connector
is already quite hot.
So I'm guessing the problem is in
Fascinating. I tried again. Must be something to do with my google history or
something. Thanks for the link.
John
> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: December-07-20 7:27 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users]
On 12/07/2020 03:54 PM, Gene Heskett wrote:
On Monday 07 December 2020 12:16:35 Jon Elson wrote:
And a/o about 13:30 local, I am alone again. My Dee has
passed.
So sorry to hear that!
Jon
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On 12/07/2020 01:45 PM, andy pugh wrote:
On Mon, 7 Dec 2020 at 19:42, Todd Zuercher wrote:
Mostly, I was hoping to avoid the thread delays of having to go through hal adding 1-2
more thread cycles to the "staleness" of the data. (Encoder read/process to
velocity, Hal read from Mesa, Hal
On 12/07/2020 11:49 AM, John Dammeyer wrote:
Googling L290 with Counter or Quadrature doesn't yield anything. Got any more
details?
I had no trouble finding it immediately. But, here's a link :
https://www.digchip.com/datasheets/parts/datasheet/456/L290-pdf.php
Jon
On 12/07/2020 11:44 AM, Chris Albertson wrote:
Really? "As much as you want"? It is not hard at all to build a device
that works at the mechanical limits of an encoder but "as much as you want"
could be a lot more than what is possible.
There is going to be quantitation noise of the speed.
Yep same here Gene.
Thinking about you!
On Tue, Dec 8, 2020, 2:18 PM Gene Heskett wrote:
> On Monday 07 December 2020 19:44:50 David Bagby wrote:
>
> > On 12/7/2020 2:02 PM, emc-users-requ...@lists.sourceforge.net wrote:
> > > And a/o about 13:30 local, I am alone again. My Dee has passed.
>
On Monday 07 December 2020 19:44:50 David Bagby wrote:
> On 12/7/2020 2:02 PM, emc-users-requ...@lists.sourceforge.net wrote:
> > And a/o about 13:30 local, I am alone again. My Dee has passed.
>
> Gene,
>
> We don't really know each other (I mostly lurk on this list), but I
> feel I've gotten to
On 12/7/2020 2:02 PM, emc-users-requ...@lists.sourceforge.net wrote:
And a/o about 13:30 local, I am alone again. My Dee has passed.
Gene,
We don't really know each other (I mostly lurk on this list), but I feel
I've gotten to know you from your posts over the years.
My sincere
On Monday 07 December 2020 17:13:13 Peter C. Wallace wrote:
> On Mon, 7 Dec 2020, Gene Heskett wrote:
> > Date: Mon, 7 Dec 2020 17:07:58 -0500
> > From: Gene Heskett
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users]
On Monday 07 December 2020 17:01:40 Ralph Stirling wrote:
> > And a/o about 13:30 local, I am alone again. My Dee has passed.
>
> You are a hero, Gene. Faithful to the very end, and kept your sanity
> and sobriety while doing so.
>
> God bless.
>
> -- Ralph
>
Thanks Ralph. Sanity is according to
On Monday 07 December 2020 14:08:00 Todd Zuercher wrote:
> Mostly, I was hoping to avoid the thread delays of having to go
> through hal adding 1-2 more thread cycles to the "staleness" of the
> data. (Encoder read/process to velocity, Hal read from Mesa, Hal
> process value/scale, Hal write
On Monday 07 December 2020 12:22:24 Chris Albertson wrote:
> Gene,
>
> It seems you have other worries, take care of your wife first.
>
That is now done as I posted to Jon.
> What I'm learning about rigid taping from following your effort is
> that I want the encoder on the spindle, NOT the
> And a/o about 13:30 local, I am alone again. My Dee has passed.
You are a hero, Gene. Faithful to the very end, and kept your sanity
and sobriety while doing so.
God bless.
-- Ralph
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On Mon, 7 Dec 2020, Gene Heskett wrote:
Date: Mon, 7 Dec 2020 17:07:58 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] [was Spindle indexing] now rigid tapping help
On Monday 07 December 2020 12:20:17 Jon
On Monday 07 December 2020 12:20:17 Jon Elson wrote:
> On 12/07/2020 06:17 AM, Gene Heskett wrote:
> > But it may take a bit, my wife has reached the end stage
> > of her COPD. Hours, maybe a day or so left. I was invited
> > to come and visit yesterday despite the covid lock down.
> > And I'll
Deepest condolences. My thoughts are with you. Stay strong.
John Dammeyer
> And a/o about 13:30 local, I am alone again. My Dee has passed.
>
> Cheers, Gene Heskett
> --
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On Monday 07 December 2020 12:18:52 Jon Elson wrote:
> On 12/07/2020 05:19 AM, andy pugh wrote:
> > On Mon, 7 Dec 2020 at 11:13, Gene Heskett
wrote:
> >> Now comes the improvement request for two more pins into motion.
> >>
> >> I need a pin to disable the backlash move, until the spindle has
>
On Monday 07 December 2020 12:16:35 Jon Elson wrote:
> On 12/07/2020 05:11 AM, Gene Heskett wrote:
> > Just one problem. I've not measured it, but I believe the backlash
> > move may be done the instant motion issues the reversal, so it takes
> > place during the spindle slowdown as its still
On Mon, 7 Dec 2020, Todd Zuercher wrote:
Date: Mon, 7 Dec 2020 19:08:00 +
From: Todd Zuercher
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Mesa Tacho Generator?
Mostly, I was hoping to avoid the thread delays of
On Mon, 7 Dec 2020 at 19:42, Todd Zuercher wrote:
> Mostly, I was hoping to avoid the thread delays of having to go through hal
> adding 1-2 more thread cycles to the "staleness" of the data. (Encoder
> read/process to velocity, Hal read from Mesa, Hal process value/scale, Hal
> write back
On Mon, 7 Dec 2020 at 14:50, Todd Zuercher wrote:
>
> Is it possible to set up a firmware for a Mesa FPGA that could read the
> encoder velocity from an encoder input and output that velocity as an analog
> command directly to an analog output
I don't know if any of the FPGAs have an analogue
Mostly, I was hoping to avoid the thread delays of having to go through hal
adding 1-2 more thread cycles to the "staleness" of the data. (Encoder
read/process to velocity, Hal read from Mesa, Hal process value/scale, Hal
write back to Mesa), and was just curious if it had been tried before.
On Mon, 7 Dec 2020, Todd Zuercher wrote:
Date: Mon, 7 Dec 2020 14:47:56 +
From: Todd Zuercher
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: [Emc-users] Mesa Tacho Generator?
Is it possible to set up a firmware for a Mesa FPGA that
> From: Jon Elson [mailto:el...@pico-systems.com]
>
>
> You can also get dedicated quadrature to tach converters
> (although they are kind of expensive)
> that could have as much bandwidth as you want. I've been
> thinking about making this one of my products for quite some
> time. TOO BAD they
Really? "As much as you want"? It is not hard at all to build a device
that works at the mechanical limits of an encoder but "as much as you want"
could be a lot more than what is possible.
There is going to be quantitation noise of the speed. The only way to
reduce it is to use a larger
Just contemplating retrofits of old Fanuc machines, but also these small
routers I was just trouble shooting last week. Sure I know these could just be
ran with the amps in current mode, but... I just wondered what if there were
an easy way to get velocity control for cheap. It may not be
On 12/07/2020 08:47 AM, Todd Zuercher wrote:
Is it possible to set up a firmware for a Mesa FPGA that could read the encoder
velocity from an encoder input and output that velocity as an analog command
directly to an analog output (hopefully at faster than the servo thread rate)
in order to
Gene,
It seems you have other worries, take care of your wife first.
What I'm learning about rigid taping from following your effort is that I
want the encoder on the spindle, NOT the motor.
On Mon, Dec 7, 2020 at 4:18 AM Gene Heskett wrote:
> On Monday 07 December 2020 06:19:15 andy pugh
On 12/07/2020 06:17 AM, Gene Heskett wrote:
But it may take a bit, my wife has reached the end stage
of her COPD. Hours, maybe a day or so left. I was invited
to come and visit yesterday despite the covid lock down.
And I'll go back today.
Sorry to hear that, very sad. Hang in there, and
On 12/07/2020 05:19 AM, andy pugh wrote:
On Mon, 7 Dec 2020 at 11:13, Gene Heskett wrote:
Now comes the improvement request for two more pins into motion.
I need a pin to disable the backlash move, until the spindle has actually
stopped.
Are you sure that isn't what already happens? (I
On 12/07/2020 05:11 AM, Gene Heskett wrote:
Just one problem. I've not measured it, but I believe the backlash move
may be done the instant motion issues the reversal, so it takes place
during the spindle slowdown as its still spinning fwd. This results in
the resultant thread being cut sloppy
There is a limit on how fast this can be done because the encoders do not
measure instantaneous speed. There are two ways to read an encoder
1) You read the encoder to get a position and then wait a short amount of
time, read it again to kw how far it moved over that short time.
Typically the
Well, I did manage to diagnose and repair the problem we were having. The
y-axis alarm was due to a failure of an IC chip on the control's main board.
Replacing that chip fixed it. My suspicion of the cause of the chip's failure
was that the amp lost power due to a loose connection on it's
Is it possible to set up a firmware for a Mesa FPGA that could read the encoder
velocity from an encoder input and output that velocity as an analog command
directly to an analog output (hopefully at faster than the servo thread rate)
in order to bypass having to do that connection in Hal? Can
On Monday 07 December 2020 06:19:15 andy pugh wrote:
> On Mon, 7 Dec 2020 at 11:13, Gene Heskett wrote:
> > Now comes the improvement request for two more pins into motion.
> >
> > I need a pin to disable the backlash move, until the spindle has
> > actually stopped.
>
> Are you sure that isn't
On Mon, 7 Dec 2020 at 11:13, Gene Heskett wrote:
> Now comes the improvement request for two more pins into motion.
>
> I need a pin to disable the backlash move, until the spindle has actually
> stopped.
Are you sure that isn't what already happens? (I guess that Halscope
can answer the
On Sunday 06 December 2020 05:41:02 andy pugh wrote:
And this did not generate any replies the first time. So I'll do some
snippage and get to it.
[...]
With my hi-res spindle encoder sitting on the back of the motor, I do
have a very stiff spindle position control.
Because the fwd/rev signal
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