"
Sent: Friday, June 23, 2017 5:07:42 PM
Subject: Re: [Emc-users] following error only while homing
- Original Message -
From: "Peter C. Wallace"
To: "Enhanced Machine Controller (EMC)"
Sent: Friday, June 23, 2017 2:13:45 PM
Subject: Re: [Emc-users] following err
servo-thread
addf hm2_5i25.0.write servo-thread
- Original Message -
From: "Peter C. Wallace"
To: "Enhanced Machine Controller (EMC)"
Sent: Friday, June 23, 2017 11:55:58 AM
Subject: Re: [Emc-users] following error only while homing
On Fri, 2
: "Todd Zuercher"
To: "Enhanced Machine Controller (EMC)"
Sent: Friday, June 23, 2017 1:20:26 PM
Subject: Re: [Emc-users] following error only while homing
That is what I've suspected but I can't figure out what I have out of place.
I did another screen shot with
On Fri, 23 Jun 2017, Todd Zuercher wrote:
Date: Fri, 23 Jun 2017 11:21:15 -0400 (EDT)
From: Todd Zuercher
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] follow
- Original Message -
From: "Nicklas Karlsson"
To: "Enhanced Machine Controller (EMC)"
Sent: Thursday, June 22, 2017 1:23:29 PM
Subject: Re: [Emc-users] following error only while homing
On Thu, 22 Jun 2017 00:06:42 +0100
andy pugh wrote:
> On 21 June 2017 at
On Thu, 22 Jun 2017 00:06:42 +0100
andy pugh wrote:
> On 21 June 2017 at 19:36, Peter C. Wallace wrote:
>
> > The stepgen is not computing following error it just cant be driven by a
> > position command with a stepwise discontinuity and move instantaneously to
> > the new position.
>
>
> I t
On 22 June 2017 at 00:19, Peter C. Wallace wrote:
>
> Only because the step was small (because it was probably not the first
> time homed)
Well, yes, but then the question is _why_ it is triggering the f-error
again.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is desig
I moved the Z axis down maybe 1/2" before issuing the home command, so it only
needs to move a short distance to get back to the switch.
-Tom
> On Jun 21, 2017, at 7:19 PM, Peter C. Wallace wrote:
>
> Only because the step was small (because it was probably not the first time
> homed)
--
On Thu, 22 Jun 2017, andy pugh wrote:
Date: Thu, 22 Jun 2017 00:06:42 +0100
From: andy pugh
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] following error only while homing
On 21 June 2017 at 19:36, Pet
On 21 June 2017 at 19:36, Peter C. Wallace wrote:
> The stepgen is not computing following error it just cant be driven by a
> position command with a stepwise discontinuity and move instantaneously to
> the new position.
I think it might be more interesting than that. Stepgen commanded positio
On Wed, 21 Jun 2017, Jon Elson wrote:
Date: Wed, 21 Jun 2017 13:22:04 -0500
From: Jon Elson
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] following error only while homing
On 06/21/2017 12:15 PM, Pe
On 06/21/2017 12:15 PM, Peter C. Wallace wrote:
A step in the FB position from the encoder and an attempt
at an impossible step in the commanded stepgen position...
All the complexities / workrounds of this position step on
index could be avoided if support for encoder counter that
can onl
On Wed, 21 Jun 2017, Jon Elson wrote:
Date: Wed, 21 Jun 2017 11:48:17 -0500
From: Jon Elson
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] following error only while homing
On 06/20/2017 10:15 AM, Sebas
On 06/20/2017 10:15 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 08:52 AM, Chris Radek wrote:
On Tue, Jun 20, 2017 at 09:27:46AM +0100, andy pugh wrote:
Now, this is perfectly normal, and with a servo / pid
machine the system
knows to ignore the f-error immediately after an encoder
reset. Wh
On Wed, 21 Jun 2017, Tom Easterday wrote:
Date: Wed, 21 Jun 2017 10:11:01 -0400
From: Tom Easterday
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] following error only while homing
So is that large jump
So is that large jump in f-error caused by the difference between
axis.2.joint-pos-cmd and axis.2.joint-pos-fb? There is a small 90 degree step
in pos-cmd that is not mirrored in pos-fb near the end, in line with the spike
of f-error. Is that the cause and why is that there?
-Tom
> On Jun 20
Well, it has been homed and is searching for index when it faults with the
following errorbut it isn't homed as I have just killed and restarted
Linuxcnc. I then move the Z axis down a little bit and then Home All...
-Tom
> On Jun 20, 2017, at 7:54 PM, Peter C. Wallace wrote:
>
> This loo
On Tue, 20 Jun 2017, tom-...@bgp.nu wrote:
Date: Tue, 20 Jun 2017 19:52:13 -0400
From: tom-...@bgp.nu
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] following error only while homing
Here is more zoom f
Here is more zoom fwiw…. http://bgp.nu/~tom/pub/enc-6.png
-Tom
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Is this what you want…?
http://bgp.nu/~tom/pub/enc-5.png
And the log file is...
http://bgp.nu/~tom/pub/enc-5.log
-Tom
> On Jun 20, 2017, at 5:34 PM, Sebastian Kuzminsky wrote:
>
> On 06/20/2017 01:31 PM, tom-...@bgp.nu wrote:
>> The Halscope trace of: hm2_7i43.0.stepgen.02.position-cmd,
>> hm
On 20 June 2017 at 22:34, Sebastian Kuzminsky wrote:
> Also increase the gain so we can see the fine detail on all the
> position-releated pins (both cmd and fb).
I was going to suggest saving the data as a .log file from Halscope, so
that people can zoom and inspect for themselves, but I can't
On 06/20/2017 01:31 PM, tom-...@bgp.nu wrote:
The Halscope trace of: hm2_7i43.0.stepgen.02.position-cmd,
hm2_7i43.0.encoder.02.position, hm2_7i43.0.encoder.02.index-enable,
axis.2.home-sw-in with trigger of axis.2.f-errored can be seen here:
http://bgp.nu/~tom/pub/enc2.png
Wel that looks
w to make it go away.)
>
> - Original Message -
> From: tom-...@bgp.nu
> To: "Enhanced Machine Controller (EMC)"
> Sent: Tuesday, June 20, 2017 3:31:42 PM
> Subject: Re: [Emc-users] following error only while homing
>
> You guys are prolific, and I appreciate it! Thanks
uesday, June 20, 2017 3:31:42 PM
Subject: Re: [Emc-users] following error only while homing
You guys are prolific, and I appreciate it! Thanks for all the input.
A few things in case it hasn’t been clear...
1) I don’t (currently) have a PID involved at all (position-mode steppers with
encoders
You guys are prolific, and I appreciate it! Thanks for all the input.
A few things in case it hasn’t been clear...
1) I don’t (currently) have a PID involved at all (position-mode steppers with
encoders only).
2) If I set FERROR=2 and MIN_FERROR=1, homing DOES complete successfully.
2) Pressi
On 20 June 2017 at 18:47, Sebastian Kuzminsky wrote:
> It looks like it'd be easy to add a ".raw-position" pin to the hostmot2
> encoder.
Does homing use the accumulated counts in the counter after index as part
of the homing offset? It feels like it should.
If it does, then this might not work
On 20 June 2017 at 18:47, Sebastian Kuzminsky wrote:
> It looks like it'd be easy to add a ".raw-position" pin to the hostmot2
> encoder. We already track .rawcount and compute .count from it, and
> compute .position from .count.
If that is the answer then rawcounts * scale => feedback might b
On 06/20/2017 11:47 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 11:39 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 11:34 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 10:51 AM, andy pugh wrote:
On 20 June 2017 at 17:37, Peter C. Wallace wrote:
I suspect this cannot work the way you have thi
On 06/20/2017 11:39 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 11:34 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 10:51 AM, andy pugh wrote:
On 20 June 2017 at 17:37, Peter C. Wallace wrote:
I suspect this cannot work the way you have this setup because of the
instantaneous jump in encoder
On 06/20/2017 11:34 AM, Sebastian Kuzminsky wrote:
On 06/20/2017 10:51 AM, andy pugh wrote:
On 20 June 2017 at 17:37, Peter C. Wallace wrote:
I suspect this cannot work the way you have this setup because of the
instantaneous jump in encoder (feedback) position at index
He has hooked up axi
On 06/20/2017 10:51 AM, andy pugh wrote:
On 20 June 2017 at 17:37, Peter C. Wallace wrote:
I suspect this cannot work the way you have this setup because of the
instantaneous jump in encoder (feedback) position at index
He has hooked up axis.*.motor-pos-cmd to the stepgens' .position-cmd,
a
On 20 June 2017 at 17:37, Peter C. Wallace wrote:
> I suspect this cannot work the way you have this setup because of the
> instantaneous jump in encoder (feedback) position at index
I wonder if the answer might be to only connect the encoder once homed?
ie, use a mux2 to to connect motor-pos-
On Mon, 19 Jun 2017, tom-...@bgp.nu wrote:
Date: Mon, 19 Jun 2017 22:51:59 -0400 From: tom-...@bgp.nu Reply-To:
"Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller
(EMC)" Subject: [Emc-users] following
error only while homing
Why would I get a
ng and problems.
> >> Maybe you have a configuration problem. Could you post a copy of
> >> your ini and hal file somewhere where we could check it over.
> >>
> >> - Original Message -
> >> From: "Tom Easterday"
> >> To: "
On 06/20/2017 09:52 AM, Chris Radek wrote:
On Tue, Jun 20, 2017 at 09:27:46AM +0100, andy pugh wrote:
Now, this is perfectly normal, and with a servo / pid machine the system
knows to ignore the f-error immediately after an encoder reset. What is
puzzling me here is why it isn't working in this
On 06/19/2017 08:51 PM, tom-...@bgp.nu wrote:
Why would I get a following error only while homing (latest Linuxcnc
2.7.9)? I recently added home switches to my machine. My machine
has encoders on the steppers on each of the 3 axes so I want to use
the index pulse for home. I set up the homing
On 06/20/2017 09:03 AM, Tom Easterday wrote:
Is there a parameter I can tweak after it happens in order to clear the fault
(e.g. can I clear the ferror value) ? I can then try to home again...
PID error should be recomputed every servo cycle. If PID
error remains at a large value, then it me
On 06/20/2017 08:00 AM, Tom Easterday wrote:
Andy, you are correct it is related to using index. Homing works fine if I
don't use index. The encoder reset makes sense as to why it CAN happen (but
shouldn't be). Is this just a bug? I would try to home a second time but as
Todd says, I can't
On 06/20/2017 07:13 AM, Todd Zuercher wrote:
I wish that were true. For some reason my analog servo machine trips up and
sets a following error on an axis about 25% of the time when trying to home to
index for the first time after turning on LInuxcnc. (Almost every time since it
is a 4 axis
On 06/20/2017 03:27 AM, andy pugh wrote:
On 20 June 2017 at 03:51, wrote:
Why would I get a following error only while homing
I think it is probably because you are using HOME_USE_INDEX (which will
zero the encoder at the index pulse) and feeding the encoder feedback back
into LinuxCNC.
Now
On 06/20/2017 08:52 AM, Chris Radek wrote:
On Tue, Jun 20, 2017 at 09:27:46AM +0100, andy pugh wrote:
Now, this is perfectly normal, and with a servo / pid machine the system
knows to ignore the f-error immediately after an encoder reset. What is
puzzling me here is why it isn't working in this
On 20 June 2017 at 15:52, Chris Radek wrote:
> > Now, this is perfectly normal, and with a servo / pid machine the system
> > knows to ignore the f-error immediately after an encoder reset. What is
> > puzzling me here is why it isn't working in this case. I think it is
>
> pid's index-enables ne
On Tue, Jun 20, 2017 at 09:27:46AM +0100, andy pugh wrote:
>
> Now, this is perfectly normal, and with a servo / pid machine the system
> knows to ignore the f-error immediately after an encoder reset. What is
> puzzling me here is why it isn't working in this case. I think it is
pid's index-enab
uot;
Sent: Tuesday, June 20, 2017 10:15:01 AM
Subject: Re: [Emc-users] following error only while homing
Hmm, it seems like I failed miserably trying to do that when I first built the
machine (this was my first build and Linuxcnc endeavor) back in 2010. I have a
vague recollection someone sugg
terday"
> To: "Enhanced Machine Controller (EMC)"
> Sent: Tuesday, June 20, 2017 9:49:51 AM
> Subject: Re: [Emc-users] following error only while homing
>
> Todd, the ini and hal config were in the first post
>
>> On Jun 20, 2017, at 9:21 AM, Todd Zuerch
Here is what my Hal file looks like for my step/dir machine with encoder
feedback. It has the stepgens configured for velocity mode and a PID loop
(using a Mesa 5i25/7i85s).
# Generated by PNCconf at Tue Jul 9 15:53:16 2013
# If you make changes to this file, they will be
# overwritten when
d hal file somewhere where we could
>> check it over.
>>
>> - Original Message -
>> From: "Tom Easterday"
>> To: "Enhanced Machine Controller (EMC)"
>> Sent: Tuesday, June 20, 2017 9:00:22 AM
>> Subject: Re: [Emc-users] follow
.
- Original Message -
From: "Tom Easterday"
To: "Enhanced Machine Controller (EMC)"
Sent: Tuesday, June 20, 2017 9:49:51 AM
Subject: Re: [Emc-users] following error only while homing
Todd, the ini and hal config were in the first post
> On Jun 20, 2017, at 9:21 A
uration problem.
> Could you post a copy of your ini and hal file somewhere where we could check
> it over.
>
> - Original Message -
> From: "Tom Easterday"
> To: "Enhanced Machine Controller (EMC)"
> Sent: Tuesday, June 20, 2017 9:00:22 AM
>
: "Tom Easterday"
To: "Enhanced Machine Controller (EMC)"
Sent: Tuesday, June 20, 2017 9:00:22 AM
Subject: Re: [Emc-users] following error only while homing
Andy, you are correct it is related to using index. Homing works fine if I
don't use index. The encoder reset mak
ler (EMC)"
>> Sent: Tuesday, June 20, 2017 4:27:46 AM
>> Subject: Re: [Emc-users] following error only while homing
>>
>>> On 20 June 2017 at 03:51, wrote:
>>>
>>> Why would I get a following error only while homing
>>
>>
>> I think
- Original Message -
> From: "andy pugh"
> To: "Enhanced Machine Controller (EMC)"
> Sent: Tuesday, June 20, 2017 4:27:46 AM
> Subject: Re: [Emc-users] following error only while homing
>
> On 20 June 2017 at 03:51, wrote:
>
> > Why
On 20 June 2017 at 03:51, wrote:
> Why would I get a following error only while homing
I think it is probably because you are using HOME_USE_INDEX (which will
zero the encoder at the index pulse) and feeding the encoder feedback back
into LinuxCNC.
Now, this is perfectly normal, and with a ser
Why would I get a following error only while homing (latest Linuxcnc 2.7.9)? I
recently added home switches to my machine. My machine has encoders on the
steppers on each of the 3 axes so I want to use the index pulse for home. I
set up the homing sequence each axis and when I do "Home All"
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