I'm finally at the point where I'm ready to bundle up the CNC cabinet with the
new Knee Servo driver connection and a few of the other changes. Status LEDs
on the front cover.
Anyway my research has turned up some interesting conclusions.
1. An open loop stepper motor system with a relay to
On Friday 12 February 2021 11:17:36 Jon Elson wrote:
> On 02/11/2021 09:41 PM, Gene Heskett wrote:
> > Well, it takes FF1 = 20.5 to get a cruise at about null,
> > And I did have FF2 = .5, but .35 cancels the stop spike.
> >
> > So my question is why are these so far out of the normal range where
On 02/11/2021 09:41 PM, Gene Heskett wrote:
Well, it takes FF1 = 20.5 to get a cruise at about null,
And I did have FF2 = .5, but .35 cancels the stop spike.
So my question is why are these so far out of the normal range where for
a stepgen FF1=1.0 and FF2 = .001 is about right. Something else
Subject: Re: [Emc-users] Dealing with Servo Faults
[EXTERNAL EMAIL] Be sure links are safe.
On Thursday 11 February 2021 18:31:31 Jon Elson wrote:
> On 02/11/2021 04:37 PM, Gene Heskett wrote:
> > So, looking at pid.error with a 100mv/div scale, 1 div would be .1
> > degree?
On Thursday 11 February 2021 18:31:31 Jon Elson wrote:
> On 02/11/2021 04:37 PM, Gene Heskett wrote:
> > So, looking at pid.error with a 100mv/div scale, 1 div would be .1
> > degree?
>
> If you look closely at the Halscope screen, you will see
> that it does NOT show a "v".
> So, you would get a
ok.. This is my take... This is why I like
linuxcnc>-a/d>- analog drive>-servo>-encoder>-linuxcnc...
The enables are controlled by motion. The power is controlled by estop.
The PID within linuxcnc has a lot of power - saturation, following error
and so on. It can detect most all faults a
On 02/11/2021 04:37 PM, Gene Heskett wrote:
So, looking at pid.error with a 100mv/div scale, 1 div would be .1
degree?
If you look closely at the Halscope screen, you will see
that it does NOT show a "v".
So, you would get a 100m/div scale, 100 milli-somethings.
If the INPUT_SCALE or SCALE
On Wednesday 10 February 2021 23:09:36 Jon Elson wrote:
> On 02/10/2021 07:08 PM, Gene Heskett wrote:
> > But is the error also in degrees? The halsope is
> > measuriing volts and I have not found anyplace where it
> > states the error is in the same sized unit the rest of
> > that particular
On Thursday 11 February 2021 10:40:12 Jon Elson wrote:
> On 02/10/2021 10:37 PM, Gene Heskett wrote:
> > I went to take the bs-1 off its table, and found I can't
> > take it very far as I have negleted to build a 2nd set of
> > inline connectors so I can disconnect the encoder and
> > really take
On 02/10/2021 10:37 PM, Gene Heskett wrote:
I went to take the bs-1 off its table, and found I can't
take it very far as I have negleted to build a 2nd set of
inline connectors so I can disconnect the encoder and
really take it away. And I've yet to come up with a scheme
to detect that it is
On Thursday 11 February 2021 07:28:51 andy pugh wrote:
> On Thu, 11 Feb 2021 at 04:39, Gene Heskett
wrote:
> > I've yet to come up
> > with a scheme to detect that it is plugged in, and if not, disable
> > linuxcnc's ability to see an error because its not there
>
> I have a GPIO pin looped up
On Thu, 11 Feb 2021 at 04:39, Gene Heskett wrote:
> I've yet to come up
> with a scheme to detect that it is plugged in, and if not, disable
> linuxcnc's ability to see an error because its not there
I have a GPIO pin looped up to the connector socket and back. A jumper
in the plug completes
I've attached the app node pdf from Practical Micro Design for their PMDX-126.
My system is set up as in Figure 1 and at the time it seemed like a really good
idea. The trouble is a fault from any of the drives into the PMDX-125 or 126
effectively removes the ChargePump which results in all
On Wednesday 10 February 2021 23:09:36 Jon Elson wrote:
> On 02/10/2021 07:08 PM, Gene Heskett wrote:
> > But is the error also in degrees? The halsope is
> > measuriing volts and I have not found anyplace where it
> > states the error is in the same sized unit the rest of
> > that particular
On 02/10/2021 07:08 PM, Gene Heskett wrote:
But is the error also in degrees? The halsope is
measuriing volts and I have not found anyplace where it
states the error is in the same sized unit the rest of
that particular servo is using. And, if its degrres I
should have tripped a coup le dozen
On Wednesday 10 February 2021 21:58:16 John Dammeyer wrote:
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> >
> > On Wednesday 10 February 2021 20:51:47 John Dammeyer wrote:
> > > Ah! Was missing
> > > setp hm2_7i92.0.gpio.023.is_output true
> > > setp hm2_7i92.0.gpio.025.is_output true
>
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> On Wednesday 10 February 2021 20:51:47 John Dammeyer wrote:
>
> > Ah! Was missing
> > setp hm2_7i92.0.gpio.023.is_output true
> > setp hm2_7i92.0.gpio.025.is_output true
> >
> > All fixed now. And setting it to DB25-17 (gpio.024) which runs a
On Wednesday 10 February 2021 20:51:47 John Dammeyer wrote:
> Ah! Was missing
> setp hm2_7i92.0.gpio.023.is_output true
> setp hm2_7i92.0.gpio.025.is_output true
>
> All fixed now. And setting it to DB25-17 (gpio.024) which runs a
> relay on this little BoB I can make the relay click on and off
Ah! Was missing
setp hm2_7i92.0.gpio.023.is_output true
setp hm2_7i92.0.gpio.025.is_output true
All fixed now. And setting it to DB25-17 (gpio.024) which runs a relay on
this little BoB I can make the relay click on and off which can run an air
solenoid and give me misting.
John
> From:
On Wednesday 10 February 2021 19:06:56 Jon Elson wrote:
> On 02/10/2021 01:45 PM, Gene Heskett wrote:
> > You may be forgetting that this is calibrated in a degree
>
> Ah, yes, 0.25 degrees doesn't look so huge.
>
> Jon
But is the error also in degrees? The halsope is measuriing volts and I
> From: Jon Elson [mailto:el...@pico-systems.com]
> On 02/10/2021 12:42 PM, John Dammeyer wrote:
> > So back to the original subject. It's not just motion that can cause a
> > driver fault. A broken encoder wire, DC or AC power instability,
> or even random electrical noise. In all those cases
On 02/10/2021 01:45 PM, Gene Heskett wrote:
You may be forgetting that this is calibrated in a degree
Ah, yes, 0.25 degrees doesn't look so huge.
Jon
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On 02/10/2021 12:42 PM, John Dammeyer wrote:
So back to the original subject. It's not just motion that can cause a driver
fault. A broken encoder wire, DC or AC power instability, or even random
electrical noise. In all those cases I've found I still have to execute a HOME
ALL command to
On Wednesday 10 February 2021 11:42:28 Matthew Herd wrote:
> I agree, I feel like that’s a fairly safe assumption, although I
> acknowledge that it is possible the drives might run away. I figure
> the best way to handle drive faults is to trigger an e-stop (via HAL)
> so that all drives and the
On Wednesday 10 February 2021 11:20:22 Jon Elson wrote:
> On 02/10/2021 01:12 AM, Gene Heskett wrote:
> > FERROR = 0.50
> > MIN_FERROR = 0.25
> >
> > And as you can see, running errors allowed are fairly
> > large as I am not done tuning.
>
> Geez, these don't protect you at all from something
nal Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: February-10-21 8:30 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Dealing with Servo Faults
>
> On Wed, 10 Feb 2021 at 16:26, Jon Elson wrote:
>
> > > So, non-faulted dr
I agree, I feel like that’s a fairly safe assumption, although I acknowledge
that it is possible the drives might run away. I figure the best way to handle
drive faults is to trigger an e-stop (via HAL) so that all drives and the
spindle halt motion. Then you could one-shot the fault clear
On Wed, 10 Feb 2021 at 16:26, Jon Elson wrote:
> > So, non-faulted drives will stop, but hold position.
> >
> Well, the issue there is whether a faulty drive would
> actually stop when disabled.
I was assuming that the faulted drives would disable themselves. I was
thinking about what to do
On 02/10/2021 03:38 AM, andy pugh wrote:
On Wed, 10 Feb 2021 at 05:11, John Dammeyer wrote:
Should just the enables to the other servo drives be removed or should power be
cut to all drives.
I don't know what the industry standard is, but I can think of
arguments for leaving the drives
On 02/10/2021 01:12 AM, Gene Heskett wrote:
FERROR = 0.50
MIN_FERROR = 0.25
And as you can see, running errors allowed are fairly
large as I am not done tuning.
Geez, these don't protect you at all from something going wrong!
Here's the settings on my X axis :
FERROR = 0.003
MIN_FERROR =
Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: Gene Heskett
Sent: Wednesday, February 10, 2021 10:03 AM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Dealing with Servo Faults
[EXTERNAL EMAIL] Be sure links are safe
On Wednesday 10 February 2021 00:08:41 John Dammeyer wrote:
Quick question.
There's a multi-axis operation in progress. For whatever reason one
of the servos throws out a fault and of course stops.
Should just the enables to the other servo drives be removed or should
power be cut to all
o repeats since turning
the heater down to the 700 watt coil only.
> -Original Message-
> From: John Dammeyer
> Sent: Wednesday, February 10, 2021 12:09 AM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: [Emc-users] Dealing with
> Servo Faults
>
> [EXTE
-
From: John Dammeyer
Sent: Wednesday, February 10, 2021 12:09 AM
To: 'Enhanced Machine Controller (EMC)'
Subject: [Emc-users] Dealing with Servo Faults
[EXTERNAL EMAIL] Be sure links are safe.
Quick question.
There's a multi-axis operation in progress. For whatever reason one of the
servos
ALL power, but shutting the PC down was silly).
-Original Message-
From: John Dammeyer [mailto:jo...@autoartisans.com]
Sent: Wednesday, 10 February 2021 4:09 PM
To: 'Enhanced Machine Controller (EMC)'
Subject: [Emc-users] Dealing with Servo Faults
Quick question.
There's a multi-axis
On Wed, 10 Feb 2021 at 05:11, John Dammeyer wrote:
> Should just the enables to the other servo drives be removed or should power
> be cut to all drives.
I don't know what the industry standard is, but I can think of
arguments for leaving the drives enabled, but stopping the motion
controller.
On Wednesday 10 February 2021 00:08:41 John Dammeyer wrote:
> Quick question.
>
> There's a multi-axis operation in progress. For whatever reason one
> of the servos throws out a fault and of course stops.
>
> Should just the enables to the other servo drives be removed or should
> power be cut
No experience on commercial systems. But I agree, a servo fault throwing
e-stop wouldn't be the best. The behaviour that seems standard on fault is
that the machine goes to power off which removes enable from all the other
axis and spindle is effective and limits the chaos to a reasonable
Quick question.
There's a multi-axis operation in progress. For whatever reason one of the
servos throws out a fault and of course stops.
Should just the enables to the other servo drives be removed or should power be
cut to all drives.
I'm not really in favour of dropping out power because
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