Re: [Emc-users] crazy experiment

[Gene Heskett]

On Tuesday 20 November 2018 19:03:08 Mark Wendt wrote:

> Huh. I've yet to have issues with Firefox on either Wheezy or Ubuntu
> 16.04 LTS. Perhaps one or more of your plugins have gang aft agly. Or
> perhaps one of your config changes is causing issues
> Try turning off all your plugins and trying again.

ATM there aren't any pluggins, and all the javascript stuff is enabled, 
but there is no response to clicking on half the buttons shown.

> If it works then 
> bring up your plugins one at a time and see which one breaks the
> browser.
>
> Mark

Been down that road clear outta sight, Mark, no help.

> On Tue, Nov 20, 2018, 18:27 Gene Heskett  > Greetings all;
> >
> > Its a known fact that the default FF in an uptodate wheezy install
> > is badly bent, it not completely broken, or its javascript is.
> >
> > So heres a chuckle for folks that like to do stuff the hard way:
> >
> > Needing to buy the 7i76D and a high speed 1284 cable to interconnect
> > it to a 5i25 from PCW's store, and being logged into a rock64
> > running armbian stretch, laying on a box in the garage, and just now
> > updated the chromium install, I thought what the heck, and sent its
> > shiny new copy of chromium to mesanet.com and successfully bought
> > the stuff. That has to be about as rube goldberg as it gets, but it
> > worked just fine. So now I have a new way to skin a cat that wheezy
> > can't anymore.
> >
> > But I'll also be glad when we have an LCNC install dvd iso built on
> > stretch.
> >
> > Thanks folks.
> >
> > --
> > 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)
> > Genes Web page 
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
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-- 
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)
Genes Web page 


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Re: [Emc-users] Surface grinder vertical axis servo motor and controller recommendation

[andy pugh]

On Wed, 21 Nov 2018 at 00:06,  wrote:

> Thanks to all who responded.  I don’t think he is married to servos, it is 
> just that the system he has has an old stepper and it has never worked well,

That's older steppers for you, though, I suspect.

Maybe one of the closed-loop steppers from Leadshine would be worth a look?

-- 
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, 1916


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Re: [Emc-users] Surface grinder vertical axis servo motor and controller recommendation

[tom-emc]

Thanks to all who responded.  I don’t think he is married to servos, it is just 
that the system he has has an old stepper and it has never worked well, most 
industrial machines he has in his shop have servos so he thought that would be 
more reliable.

> On Nov 20, 2018, at 12:37 AM, Gene Heskett  wrote:
> 
> What is wrong with the drive? It might be repairable with some fresh 
> capacitors.

The DRO display was nixie tube based and it has bad tubes as well as (now) 
being completely off.  So probably not worth trying to revive.  In addition, as 
I said above the system has never worked well, it often loses position or moves 
the wrong amount.  He wants to replace it at this point.

> Because it will need to scan the surface, it seems to me LCNC would be 
> pretty ideal, with suitably sized steppers all around. You don't 
> normally drive a surface grinder at >20 ipm , and steppers can do that 
> nicely. You can also write the code to remove as little as you want per 
> pass, even staying ahead of wheel wear once thats been characterized.
> 
> Seems like servo's would be overkill for that job.


Yes, Linuxcnc would certainly work and you are correct that speed isn’t an 
issue so could probably just step from the PC.  Also, given a modern stepper 
with enough torque it would probably be fine vs a servo system.  Linuxcnc just 
seems a bit overkill (as well) given the simplicity of what he wants to do.

Thanks,
-Tom



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Re: [Emc-users] crazy experiment

[Mark Wendt]

Huh. I've yet to have issues with Firefox on either Wheezy or Ubuntu 16.04
LTS. Perhaps one or more of your plugins have gang aft agly. Or perhaps one
of your config changes is causing issues
Try turning off all your plugins and trying again. If it works then bring
up your plugins one at a time and see which one breaks the browser.

Mark

On Tue, Nov 20, 2018, 18:27 Gene Heskett  Greetings all;
>
> Its a known fact that the default FF in an uptodate wheezy install is
> badly bent, it not completely broken, or its javascript is.
>
> So heres a chuckle for folks that like to do stuff the hard way:
>
> Needing to buy the 7i76D and a high speed 1284 cable to interconnect it
> to a 5i25 from PCW's store, and being logged into a rock64 running
> armbian stretch, laying on a box in the garage, and just now updated the
> chromium install, I thought what the heck, and sent its shiny new copy
> of chromium to mesanet.com and successfully bought the stuff. That has
> to be about as rube goldberg as it gets, but it worked just fine. So now
> I have a new way to skin a cat that wheezy can't anymore.
>
> But I'll also be glad when we have an LCNC install dvd iso built on
> stretch.
>
> Thanks folks.
>
> --
> 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)
> Genes Web page 
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

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[Emc-users] crazy experiment

[Gene Heskett]

Greetings all;

Its a known fact that the default FF in an uptodate wheezy install is 
badly bent, it not completely broken, or its javascript is.

So heres a chuckle for folks that like to do stuff the hard way:

Needing to buy the 7i76D and a high speed 1284 cable to interconnect it 
to a 5i25 from PCW's store, and being logged into a rock64 running 
armbian stretch, laying on a box in the garage, and just now updated the 
chromium install, I thought what the heck, and sent its shiny new copy 
of chromium to mesanet.com and successfully bought the stuff. That has 
to be about as rube goldberg as it gets, but it worked just fine. So now 
I have a new way to skin a cat that wheezy can't anymore.

But I'll also be glad when we have an LCNC install dvd iso built on 
stretch.

Thanks folks.
 
-- 
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)
Genes Web page 


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Re: [Emc-users] UPS on controller

[Gene Heskett]

On Tuesday 20 November 2018 14:29:53 Chris Albertson wrote:

> I think the only reason to have a UPS on a machine is if you actually
> wanted to run the machine after losing AC power.   that case the UPS
> would be sized to power the entire machine, motors and all.
>
Exactly. And in my case it won't need a whole lot of holdup time because 
theres a 20kw nat gas fed generator that is up and delivering power to 
the whole property by 15 seconds after the lights blink off. Worst case 
I'd need 10kw for say 20 seconds. That generator was about $8.5k 
installed, cheaper than a ups that honking big. But to have a power hit 
while one of my machines was doing something (they aren't on the ups 
driving parts of this room) has yet to wreck a part, or a filesystem. 
But thats only happend a time or maybe two in the last 15 years.

> If you are concerned about file system corruption on power failure,
> two things can help (1) use a modern Journaled file system.  These are
> VERY crash resistant.  Most Linux distributions do use Journaled file
> system like ext4. ext4 is very robust.and if you are very worried
> use a write-only file system to hold all the non-volatile files.  
> This method is near "bomb proof" but takes some effort to set up.
>
> On Tue, Nov 20, 2018 at 7:10 AM Thaddeus Waldner  
wrote:
> > My question is, *should* a controller such as this have an
> > uninterruptible power supply? If so, what parts of the machine are
> > normally served by a UPS?

The only thing I'd worry about on this surface grinder is the z drive if 
its a servo which on loss of power may run free, dropping the wheel into 
the work. But immobilizing that would be far easier done by dropping a 
lock onto it on loss of power. If the lock hooked into a drive belt, it 
might be possible to pull the belt a tooth or so higher if its rigged 
right, lifting the wheel a few microns for the ultimate in safety for 
the workpiece.

If a stepper, it usually has enough power off cogging to hold it where it 
was. I've never had the head on the G0704 try to fall unless the motor 
is removed.

My $0,02.

-- 
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)
Genes Web page 


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Re: [Emc-users] UPS on controller

[Chris Albertson]

I think the only reason to have a UPS on a machine is if you actually
wanted to run the machine after losing AC power.   that case the UPS would
be sized to power the entire machine, motors and all.

If you are concerned about file system corruption on power failure, two
things can help (1) use a modern Journaled file system.  These are VERY
crash resistant.  Most Linux distributions do use Journaled file system
like ext4. ext4 is very robust.and if you are very worried use a
write-only file system to hold all the non-volatile files.   This method is
near "bomb proof" but takes some effort to set up.

On Tue, Nov 20, 2018 at 7:10 AM Thaddeus Waldner  wrote:

>
> My question is, *should* a controller such as this have an uninterruptible
> power supply? If so, what parts of the machine are normally served by a UPS?
>

-- 

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] UPS on controller

[Jon Elson]

On 11/20/2018 09:06 AM, Thaddeus Waldner wrote:

I’m in the process of converting a small medium-duty table router to work with 
a LinuxCNC controller. I am duly impressed that such a wealth of technical 
information and such a powerful and robust industrial automation tool should be 
available to the public, free of charge. Many thanks to all who make it 
possible.

I have completed a working concept of the controller, as in, I had it up and 
running and actually cut some parts.

My question is, *should* a controller such as this have an uninterruptible 
power supply? If so, what parts of the machine are normally served by a UPS?

Unless the SPINDLE is also on the UPS, then it doesn't make 
much sense.  The UPS-powered CNC control would be unaware 
the spindle had stopped, and cause a crash.  Now, in some 
cases, the spindle drive could be set up to cause an E-stop, 
and thus prevent a big mess, when it loses power.  The VFD 
on my mill is set up like that.


Jon


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[Emc-users] UPS on controller

[Roland Jollivet]

I once worked on an old Sodick wire eroder. It had a large 12V battery
built in. But I can't remember to what extent the battery kept circuitry
alive in the event of a power fail.



On Tue, 20 Nov 2018 at 19:57, Les Newell  wrote:

> I have done quite a lot of maintenance work on various industrial
> machines. I can't think of even one machine I have worked on that had a
> UPS fitted. I have seen a few with line conditioning circuitry where
> they have particularly noisy supply. If power cuts are a regular
> occurrence I suppose a UPS may be of some benefit but it would have to
> be big enough to run the whole machine, which is likely to be very
> expensive.
>
> Linux is pretty tolerant to being powered off without warning and it is
> very rare to get any form of filesystem corruption from doing so. All of
> my machines have the computer buried inside and when I am done I simply
> turn the whole machine off. I've never seen any problems with doing this.
>
> Les
>
> On 20/11/2018 15:06, Thaddeus Waldner wrote:
> > I’m in the process of converting a small medium-duty table router to
> work with a LinuxCNC controller. I am duly impressed that such a wealth of
> technical information and such a powerful and robust industrial automation
> tool should be available to the public, free of charge. Many thanks to all
> who make it possible.
> >
> > I have completed a working concept of the controller, as in, I had it up
> and running and actually cut some parts.
> >
> > My question is, *should* a controller such as this have an
> uninterruptible power supply? If so, what parts of the machine are normally
> served by a UPS?
> >
>
>
>
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Re: [Emc-users] UPS on controller

[Les Newell]

I have done quite a lot of maintenance work on various industrial 
machines. I can't think of even one machine I have worked on that had a 
UPS fitted. I have seen a few with line conditioning circuitry where 
they have particularly noisy supply. If power cuts are a regular 
occurrence I suppose a UPS may be of some benefit but it would have to 
be big enough to run the whole machine, which is likely to be very 
expensive.


Linux is pretty tolerant to being powered off without warning and it is 
very rare to get any form of filesystem corruption from doing so. All of 
my machines have the computer buried inside and when I am done I simply 
turn the whole machine off. I've never seen any problems with doing this.


Les

On 20/11/2018 15:06, Thaddeus Waldner wrote:

I’m in the process of converting a small medium-duty table router to work with 
a LinuxCNC controller. I am duly impressed that such a wealth of technical 
information and such a powerful and robust industrial automation tool should be 
available to the public, free of charge. Many thanks to all who make it 
possible.

I have completed a working concept of the controller, as in, I had it up and 
running and actually cut some parts.

My question is, *should* a controller such as this have an uninterruptible 
power supply? If so, what parts of the machine are normally served by a UPS?





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Re: [Emc-users] UPS on controller

[andy pugh]

On Tue, 20 Nov 2018 at 16:54, Thaddeus Waldner  wrote:

>  I’m intrigued by the “record the line number and then shut down” part. Is 
> this something that the user would do manually after noticing that the power 
> was cut or is this somehow automated?

A userspace HAL component could record motion.program-line to a file
when the UPS signalled a fault.
I think that the component would need to pass-through the e-stop
condition so that it gets written to file before being set to zero by
e-stop.

-- 
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, 1916


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Re: [Emc-users] UPS on controller

[Thaddeus Waldner]

Any thoughts on using the serial connection on the UPS for sensing power down 
condition?

> On Nov 20, 2018, at 10:59 AM, Marius Liebenberg  
> wrote:
> 
> The machine stops when the emergency button is pushed. The power to  the 
> motors are cut and the programs stops at a line. The operator records that 
> line (or at least I do ) and then the job can be run from there or the 
> closest line that is not in a canned cycle or and incremental command.
> Remember this is crisis recovery and not the norm.
> 
> -- Original Message --
> From: "Thaddeus Waldner" 
> To: "Marius Liebenberg" ; "Enhanced Machine 
> Controller (EMC)" 
> Sent: 2018-11-20 18:50:26
> Subject: Re: [Emc-users] UPS on controller
> 
>> I’m intrigued by the “record the line number and then shut down” part. Is 
>> this something that the user would do manually after noticing that the power 
>> was cut or is this somehow automated?
>> 
>>> On Nov 20, 2018, at 10:10 AM, Marius Liebenberg  
>>> wrote:
>>> 
>>> I agree with Andy. I put my controllers on a UPS and then have a signal 
>>> that is wired through a drop-out relay that is also connected to the 
>>> emergency stop switch. So when the power fails the machine is stopped and 
>>> you can record line numbers at least and then shut down.
>>> 
>>> -- Original Message --
>>> From: "andy pugh" 
>>> To: "Enhanced Machine Controller (EMC)" 
>>> Sent: 2018-11-20 17:14:59
>>> Subject: Re: [Emc-users] UPS on controller
>>> 
 On Tue, 20 Nov 2018 at 15:10, Thaddeus Waldner  wrote:
 
>  My question is, *should* a controller such as this have an 
> uninterruptible power supply? If so, what parts of the machine are 
> normally served by a UPS?
 
 I doubt that it is common to attempt to machine on standby power, but
 I can see good reasons to try to keep the controller alive to perform
 a controlled axis/spindle stop and graceful shutdown (including
 writing to the log files, tool-table etc)
 
 --
 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, 1916
 
 
 ___
 Emc-users mailing list
 Emc-users@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/emc-users
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>> 
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Re: [Emc-users] UPS on controller

[Marius Liebenberg]

The machine stops when the emergency button is pushed. The power to  the 
motors are cut and the programs stops at a line. The operator records 
that line (or at least I do ) and then the job can be run from there or 
the closest line that is not in a canned cycle or and incremental 
command.

Remember this is crisis recovery and not the norm.

-- Original Message --
From: "Thaddeus Waldner" 
To: "Marius Liebenberg" ; "Enhanced Machine 
Controller (EMC)" 

Sent: 2018-11-20 18:50:26
Subject: Re: [Emc-users] UPS on controller

I’m intrigued by the “record the line number and then shut down” part. 
Is this something that the user would do manually after noticing that 
the power was cut or is this somehow automated?


 On Nov 20, 2018, at 10:10 AM, Marius Liebenberg 
 wrote:


 I agree with Andy. I put my controllers on a UPS and then have a 
signal that is wired through a drop-out relay that is also connected 
to the emergency stop switch. So when the power fails the machine is 
stopped and you can record line numbers at least and then shut down.


 -- Original Message --
 From: "andy pugh" 
 To: "Enhanced Machine Controller (EMC)" 


 Sent: 2018-11-20 17:14:59
 Subject: Re: [Emc-users] UPS on controller


 On Tue, 20 Nov 2018 at 15:10, Thaddeus Waldner  wrote:

  My question is, *should* a controller such as this have an 
uninterruptible power supply? If so, what parts of the machine are 
normally served by a UPS?


 I doubt that it is common to attempt to machine on standby power, 
but
 I can see good reasons to try to keep the controller alive to 
perform

 a controlled axis/spindle stop and graceful shutdown (including
 writing to the log files, tool-table etc)

 --
 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, 1916


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Re: [Emc-users] UPS on controller

[Thaddeus Waldner]

I’m intrigued by the “record the line number and then shut down” part. Is this 
something that the user would do manually after noticing that the power was cut 
or is this somehow automated? 

> On Nov 20, 2018, at 10:10 AM, Marius Liebenberg  
> wrote:
> 
> I agree with Andy. I put my controllers on a UPS and then have a signal that 
> is wired through a drop-out relay that is also connected to the emergency 
> stop switch. So when the power fails the machine is stopped and you can 
> record line numbers at least and then shut down.
> 
> -- Original Message --
> From: "andy pugh" 
> To: "Enhanced Machine Controller (EMC)" 
> Sent: 2018-11-20 17:14:59
> Subject: Re: [Emc-users] UPS on controller
> 
>> On Tue, 20 Nov 2018 at 15:10, Thaddeus Waldner  wrote:
>> 
>>>  My question is, *should* a controller such as this have an uninterruptible 
>>> power supply? If so, what parts of the machine are normally served by a UPS?
>> 
>> I doubt that it is common to attempt to machine on standby power, but
>> I can see good reasons to try to keep the controller alive to perform
>> a controlled axis/spindle stop and graceful shutdown (including
>> writing to the log files, tool-table etc)
>> 
>> --
>> 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, 1916
>> 
>> 
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Re: [Emc-users] UPS on controller

[Marius Liebenberg]

I agree with Andy. I put my controllers on a UPS and then have a signal 
that is wired through a drop-out relay that is also connected to the 
emergency stop switch. So when the power fails the machine is stopped 
and you can record line numbers at least and then shut down.


-- Original Message --
From: "andy pugh" 
To: "Enhanced Machine Controller (EMC)" 


Sent: 2018-11-20 17:14:59
Subject: Re: [Emc-users] UPS on controller


On Tue, 20 Nov 2018 at 15:10, Thaddeus Waldner  wrote:

  My question is, *should* a controller such as this have an 
uninterruptible power supply? If so, what parts of the machine are 
normally served by a UPS?


I doubt that it is common to attempt to machine on standby power, but
I can see good reasons to try to keep the controller alive to perform
a controlled axis/spindle stop and graceful shutdown (including
writing to the log files, tool-table etc)

--
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, 1916


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Re: [Emc-users] UPS on controller

[Gene Heskett]

On Tuesday 20 November 2018 10:06:20 Thaddeus Waldner wrote:

> I’m in the process of converting a small medium-duty table router to
> work with a LinuxCNC controller. I am duly impressed that such a
> wealth of technical information and such a powerful and robust
> industrial automation tool should be available to the public, free of
> charge. Many thanks to all who make it possible.
>
> I have completed a working concept of the controller, as in, I had it
> up and running and actually cut some parts.
>
> My question is, *should* a controller such as this have an
> uninterruptible power supply? If so, what parts of the machine are
> normally served by a UPS?
>
Thats entirely up to you, but if you did, the ups should be big enough to 
run the whole machine And last long enough to finish the job its 
running. You aren't going to buy such a ups at Staples.
>
>
>
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-- 
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)
Genes Web page 


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Re: [Emc-users] UPS on controller

[andy pugh]

On Tue, 20 Nov 2018 at 15:10, Thaddeus Waldner  wrote:

>  My question is, *should* a controller such as this have an uninterruptible 
> power supply? If so, what parts of the machine are normally served by a UPS?

I doubt that it is common to attempt to machine on standby power, but
I can see good reasons to try to keep the controller alive to perform
a controlled axis/spindle stop and graceful shutdown (including
writing to the log files, tool-table etc)

-- 
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, 1916


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[Emc-users] UPS on controller

[Thaddeus Waldner]

I’m in the process of converting a small medium-duty table router to work with 
a LinuxCNC controller. I am duly impressed that such a wealth of technical 
information and such a powerful and robust industrial automation tool should be 
available to the public, free of charge. Many thanks to all who make it 
possible.

I have completed a working concept of the controller, as in, I had it up and 
running and actually cut some parts.

My question is, *should* a controller such as this have an uninterruptible 
power supply? If so, what parts of the machine are normally served by a UPS?




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Re: [Emc-users] question on progress of addf survey tool.

[Gene Heskett]

On Tuesday 20 November 2018 04:53:11 Erik Christiansen wrote:

> On 19.11.18 19:41, Gene Heskett wrote:
> > On Monday 19 November 2018 14:28:14 Nicklas Karlsson wrote:
> > > > We need a utility that detects out of order addf's, each of
> > > > which then causes a one thread execution delay in the data
> > > > traveling that path. Data from a limit/home switch to use a real
> > > > simple circuit, should be present at the motion input when
> > > > motion is invoked. But what if the debounce addf is out of its
> > > > assumed order? Placed below motion in that thread?
> > >
> > > With out of order you mean output from one thread is used in
> > > another thread?
> >
> > Only where it makes sense, see below.
> >
> > > Otherwise I anywhere within period is ok.
> >
> > No, its not, because if a module is out of order, too early, and is
> > being fed from another module thats later in the thread, then its
> > input is always stale by one thread time.  That can be hell to find
> > when you can't move 2 thou without generating a following error.
>
> As that's the nub of it, ISTM that the great big spaghetti ball of
> keeping track of where _all_ signals go need not be tackled just to
> solve the problem of stale input. If we acquire a list of the outputs
> of each addf as we descend the list, then it is only necessary to
> check each input of each addf against the accumulated list. An input
> missing from the accululated list of outputs of prior addfs is a stale
> input.
>
> So, IIUC, then the problem boils down to scraping the outputs of each
> addf, as the rest is easy, AFAICT. (At worst, a list of lists, i.e. a
> list of prior modules, used to index a list of outputs per module.
> Awk's associative arrays are made for this little job.)
>
And thats a problem, I've never learned how to use awk effectively.

> After half a year of chasing 6 builders, without finding one who could
> squeeze my build in, I've gone owner-builder, with all the time
> consuming contractor chasing and leg-roping that entails - so no
> promises, but sample text from which the list of outputs needs to be
> scraped would be the first step toward a solution to this task.
>
And that entails making sure its both code compliant AND exactly what you 
want, and brings its own satisfaction when its done that you'll never 
get writing a check to a contractor.

Lots of my little projects over the last 30+ years have grown into big 
DIY things.  As you know, any flat area in WV was made with a dozer and 
lots of diesel fuel. So a new retaining wall near the upper edge of our 
lot seemed like a good idea since the cement block put up in the 70's 
had fallen over.

But these so called landscaping blocks sold are at about 15 lbs each, way 
too light to resist mother nature for long.  Our carport needed help 
too.

So I went to the outside edge and dug down to the base of a cement block 
wall which had self-demolished over the 20 years it had been there, 
opening up a ditch and stacking the clay above on the hill. Went on down 
another 8", and 18" wide, laid a 6" perf-pipe for additional drainage  
against the outer edge and started making a new footer. Poured it from a 
HF cement mixer, the $190 electric version. I made a clamshell mold to 
make these blocks that weighed 55 lbs each, same shape as the commercial 
version but with river aggregate inlaid in the face, making 6 at a time, 
about 3 mold refills a week, I was still working as this was in the 
middle '90's. Finally had them stacked up in front of the house, heavy 
enough to start breaking up the concrete walk/drive. Not quite 400 of 
them.  Stacked them up on the new footer about 7, 5.75" layers deep. 
Made a good looking wall. Back filled most of the clay against the 
outside/back of it. After laying a sheet of 10 mill black plastic 
against the backside to make sure any water left by way of the perf pipe 
behind it.

But we needed to do away with the carport and build a real garage so that 
Dee, who was then doing both the piano and after the organist retired, a 
huge pipe organ at our church. So she needed a place for the car that 
was in out of the weather, which was the impetus to build an attached 
14x24 garage.  The wall hadn't moved since I laid it up, and still 
hasn't, so I used the wall as the first 3.5 feet of the right wall and 
the rear wall, with the garage skeleton just sitting on it. All 2x6's on 
24" centers, and very little in the way of anchors into a new slab about 
8 to 9" deep except for the front wall. That was in 2008. Dee was by 
then retired and eventually gave up playing at church, so I started 
moving in machinery. Traded for a shorter car but even that hasn't been 
under cover since a tool cabinet, planer, workbench yadda yadda joined a 
table saw. Now I seriously need to clean house and the path from the 
back door to the garage door is only 3 feet wide at its widest.  And 
that home made wall still hasn't moved. Neither has the garage despite a 
112 mph wind in 

Re: [Emc-users] question on progress of addf survey tool.

[Erik Christiansen]

On 19.11.18 19:41, Gene Heskett wrote:
> On Monday 19 November 2018 14:28:14 Nicklas Karlsson wrote:
> > > We need a utility that detects out of order addf's, each of which
> > > then causes a one thread execution delay in the data traveling that
> > > path. Data from a limit/home switch to use a real simple circuit,
> > > should be present at the motion input when motion is invoked. But
> > > what if the debounce addf is out of its assumed order? Placed below
> > > motion in that thread?
> >
> > With out of order you mean output from one thread is used in another
> > thread?
> 
> Only where it makes sense, see below.
> 
> > Otherwise I anywhere within period is ok.
> 
> No, its not, because if a module is out of order, too early, and is being 
> fed from another module thats later in the thread, then its input is 
> always stale by one thread time.  That can be hell to find when you 
> can't move 2 thou without generating a following error.

As that's the nub of it, ISTM that the great big spaghetti ball of
keeping track of where _all_ signals go need not be tackled just to
solve the problem of stale input. If we acquire a list of the outputs of
each addf as we descend the list, then it is only necessary to check
each input of each addf against the accumulated list. An input missing
from the accululated list of outputs of prior addfs is a stale input.

So, IIUC, then the problem boils down to scraping the outputs of each
addf, as the rest is easy, AFAICT. (At worst, a list of lists, i.e. a
list of prior modules, used to index a list of outputs per module. Awk's
associative arrays are made for this little job.)

After half a year of chasing 6 builders, without finding one who could
squeeze my build in, I've gone owner-builder, with all the time
consuming contractor chasing and leg-roping that entails - so no
promises, but sample text from which the list of outputs needs to be
scraped would be the first step toward a solution to this task.

Erik


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