Re: [Emc-users] rtai on 12.04 Ubuntu

[dave]

Ah! Might change and probably will. Murphy and all his cousins are alive 
and well.
Thanks for the comment.

However, I update very sparselystill running on a 1200 Duron and 
2.5? Clearly time to upgrade. ;-)
My goal is to consistently make chips.

Dave

On 01/05/2017 05:15 PM, Kurt Jacobson wrote:
> I found out the hard way that it is not a good idea to select the kernel
> numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
> an update?) the order might change.
>
> I now use the string method as below exclusively and have not had any
> surprises since.
> GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>
> Kurt
>
> On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:
>
>> With  some help from Kent this turns out to be not too onerous.
>>
>> Boot your system and on the boot menu note which kernel you want ( by
>> number ) starting with 0.
>> Ditto if you are in the alternate menu.
>>
>> #modify /etc/default/grub
>>
>> $cd /etc/default
>> sudo vim grub
>> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
>> to GRUB_DEFAULT="2>n"
>> save and exit vim
>>
>> # or in main menu just GRUB_DEFAULT="count-1"
>> # in alternate menu = "line number of alternate menu in main
>> menu>count-1 in menu"
>>
>> #update grub.cfg
>> sudo update-grub
>>
>> #reboot
>> sudo shutdown -r now
>>
>> # or you can select the kernel like this by string.
>> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>> #where n is the entry you want (count -1).
>>
>> #For the original menu I think you can omit the n> and go with it.
>> #remember anytime you change /etc/default/grub you need  to update grub.
>> Don't ask me
>> #how I know.
>>
>> Now it is up to someone good with good documentation skills to make
>> certain this is understandable and get it into the docs.
>>
>> HTH
>>
>>
>>
>>
>> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
>>> On 01/03/2017 04:47 PM, dave wrote:
 Re:
 http://linuxcnc.org/docs/html/getting-started/getting-
>> linuxcnc.html#_installing_on_ubuntu_precise
 The instructions for the install are nicely done. I tried it both by
 typing individual lines and  by enclosing the block of instructions in
>> {}.
 Seemed to work either way but no joy on uname -r |  uname -a.

 Apparently grub does not get updated by the install and therefore one
 boots into the ...generic.
 I've pretty well worked my way thru  grub but need to weed the list to a
 generic, generic(recovery) and
 rtai.  Rtai comes up on a secondary list and I need to change that.

 Not complaining just a heads up. Nice to have it all laid out.
>>> If you figure out a clear way to describe the changes needed to the GRUB
>>> config, an update to the docs would be much appreciated!
>>>
>>>
>>
>> 
>> --
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>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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Re: [Emc-users] EDM machining --> EDM generator signals

[TJoseph Powderly]

Nicklashello
the time from voltage turn-on until the voltage dropis the ionization time
this can be used as an indication of the gap 'clean'.

the idea is that IF the gap is very clean ,
and constantly clean,
each ignition delay time measured will be uniform
and will be a 'standard' value for comparison.

as the cut progresses and more debris is generated,
this time measure will change and  decrease
because the debris will reducethedielectric quality (the anti-conducting 
quality).
( we taught users that the dirt was like stepping stones for the 
lighting bolt of the spark )

IF the time is too small,
then the gap is dimensionally too small ( too close )
or too dirty ( needs 'peck' cycle )
or more fluid flow ( sweep up the dirt )
or more offtime or a combination of these

this ionization monitor cause & effect loop should be faster than 100mS
you cant change flow rates that quickly but you can add offtime to 
subsequent pulses
other strategies are in scientific papers

re: The sparc counter
not sure what the count deal with yet
it sounds like you could get a number related to (sparcs_attempted / 
sparcs_actual) = sparc_efficiency
and then see if adjusting edm servo target voltage or offtime would 
increae that ratio

adaptive control in edm is a great idea
BUT
make sure the adaptive control can be turned off!
many times in AGie and Elox and Mitsubishi cutting, we found that 
turning the autopilots off was neccesary
( let ME drive the damn thing!)

research often calls these devices  'pulse discriminators' <<<--- google 
that for more

http://reza.hoseinnezhad.com/papers/Kotler_MST_preprint.pdf

there was a good one by Prof Rajurkar at Univ Nebraska but i cant find it
we built one with FORTH NMIS boards, and our Taiwan machines used a tiny 
PEEL and a PIC microcontroller to measure ionization time
of course there were resistor dividers to reduce the 100+Volts and a 
diode bridge to make sure the polarity sampled was correct
then some unity gain OPs then level sensing ladder to sort out digital 
info about Volatge level at what time during the attempted pulse
some was too fast for the PIC so the logic of the PEEL was needed

tomp tjtr33

On 01/06/17 04:41, Nicklas Karlsson wrote:
> I am thinking about the ionization and sparc counters. These counters might 
> be useful to calculate how well the process work and maybe adjust parameters?
>
> On Mon, 2 Jan 2017 23:53:55 +0700
> TJoseph Powderly  wrote:
>
>> Hello
>> video of early iteration of edm panel in use
>> https://videobin.org/+fe8/jab.html
>> i think an example of reading the db file needs to be done soon
>> but a working model is better than just thinkin'
>> thanks
>> tomp tjtr33
>>
>>
>>
>> --
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>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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Re: [Emc-users] rtai on 12.04 Ubuntu

[Kurt Jacobson]

I found out the hard way that it is not a good idea to select the kernel
numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
an update?) the order might change.

I now use the string method as below exclusively and have not had any
surprises since.
GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"

Kurt

On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> HTH
>
>
>
>
> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> > On 01/03/2017 04:47 PM, dave wrote:
> >> Re:
> >> http://linuxcnc.org/docs/html/getting-started/getting-
> linuxcnc.html#_installing_on_ubuntu_precise
> >>
> >> The instructions for the install are nicely done. I tried it both by
> >> typing individual lines and  by enclosing the block of instructions in
> {}.
> >> Seemed to work either way but no joy on uname -r |  uname -a.
> >>
> >> Apparently grub does not get updated by the install and therefore one
> >> boots into the ...generic.
> >> I've pretty well worked my way thru  grub but need to weed the list to a
> >> generic, generic(recovery) and
> >> rtai.  Rtai comes up on a secondary list and I need to change that.
> >>
> >> Not complaining just a heads up. Nice to have it all laid out.
> > If you figure out a clear way to describe the changes needed to the GRUB
> > config, an update to the docs would be much appreciated!
> >
> >
>
>
> 
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Re: [Emc-users] corcom's site a blank, no data on any of their filters

[Gene Heskett]

On Thursday 05 January 2017 15:39:12 Ken Strauss wrote:

> I sent you a data sheet.

Got it, confirms my suspicion that these filters are losing their 
effectiveness by the time we get to ths spi bus's speed of 32 megabaud.

They aren't anywhere near a brick wall at 30 MHz.  Usefull It think, but 
I wouldn't call them brick walls.

In any event, thank you Ken S.
>
> > -Original Message-
> > From: Gene Heskett [mailto:ghesk...@shentel.net]
> > Sent: Thursday, January 05, 2017 3:20 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: [Emc-users] corcom's site a blank, no data on any of their
>
> filters
>
> > Greetings folks;
> >
> > Does anyibe know where I can find data, loss vs frequency graphs
> > etc, for
>
> a
>
> > Corcom 20VSK6 line filter? I now have 2 of them warming up.
> >
> > Thanks all.
> >
> > 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 
>
> --
>-- --
>
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> > ___
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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] rtai on 12.04 Ubuntu

[Andrew]

2017-01-05 22:32 GMT+02:00 dave :

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> I successfully used grub-customizer to change boot options (isolcpus
etc.) an set defaults.

Andrew
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Re: [Emc-users] rtai on 12.04 Ubuntu

[Kurt Jacobson]

I found out the hard way that it is not a good idea to select the kernel
numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
an update?) the order might change.

I now use the string method as below exclusively and have not had any
surprises since.
GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"

Kurt

On Thu, Jan 5, 2017 at 3:32 PM, dave  wrote:

> With  some help from Kent this turns out to be not too onerous.
>
> Boot your system and on the boot menu note which kernel you want ( by
> number ) starting with 0.
> Ditto if you are in the alternate menu.
>
> #modify /etc/default/grub
>
> $cd /etc/default
> sudo vim grub
> change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu
> to GRUB_DEFAULT="2>n"
> save and exit vim
>
> # or in main menu just GRUB_DEFAULT="count-1"
> # in alternate menu = "line number of alternate menu in main
> menu>count-1 in menu"
>
> #update grub.cfg
> sudo update-grub
>
> #reboot
> sudo shutdown -r now
>
> # or you can select the kernel like this by string.
> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
> #where n is the entry you want (count -1).
>
> #For the original menu I think you can omit the n> and go with it.
> #remember anytime you change /etc/default/grub you need  to update grub.
> Don't ask me
> #how I know.
>
> Now it is up to someone good with good documentation skills to make
> certain this is understandable and get it into the docs.
>
> HTH
>
>
>
>
> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> > On 01/03/2017 04:47 PM, dave wrote:
> >> Re:
> >> http://linuxcnc.org/docs/html/getting-started/getting-
> linuxcnc.html#_installing_on_ubuntu_precise
> >>
> >> The instructions for the install are nicely done. I tried it both by
> >> typing individual lines and  by enclosing the block of instructions in
> {}.
> >> Seemed to work either way but no joy on uname -r |  uname -a.
> >>
> >> Apparently grub does not get updated by the install and therefore one
> >> boots into the ...generic.
> >> I've pretty well worked my way thru  grub but need to weed the list to a
> >> generic, generic(recovery) and
> >> rtai.  Rtai comes up on a secondary list and I need to change that.
> >>
> >> Not complaining just a heads up. Nice to have it all laid out.
> > If you figure out a clear way to describe the changes needed to the GRUB
> > config, an update to the docs would be much appreciated!
> >
> >
>
>
> 
> --
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> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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-- 
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MET Student - Southern Polytechnic College of Engineering
Vice President - Kennesaw Nuclear Society
Student Assistant - Center for Nuclear Studies
Kennesaw State University | Marietta Campus
Cell: 505-303-1933 - *NOTE:* Changed as of 12/1/16
E-mail: kurtjacob...@bellsouth.net
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Re: [Emc-users] EDM machining --> EDM generator signals

[Nicklas Karlsson]

I am thinking about the ionization and sparc counters. These counters might be 
useful to calculate how well the process work and maybe adjust parameters?

On Mon, 2 Jan 2017 23:53:55 +0700
TJoseph Powderly  wrote:

> Hello
> video of early iteration of edm panel in use
> https://videobin.org/+fe8/jab.html
> i think an example of reading the db file needs to be done soon
> but a working model is better than just thinkin'
> thanks
> tomp tjtr33
> 
> 
> 
> --
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> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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Re: [Emc-users] EDM machining --> EDM generator signals --> Protocol

[Nicklas Karlsson]

Not yet I am still thinking. CANopen is used on CAN but I have also seen 
implementation over Ethernet and guess same packet could be routed to serial or 
SPI.

CANopen protocol is attractive because it have simple PDO for real time data 
and SDO for dictionary with parameters.

What I want is a standard protocol with more or less same packet format on 
different media, simple packets with little overhead and a dictionary for 
parameters.

On Mon, 2 Jan 2017 19:40:29 +
Sarah Armstrong  wrote:

> Nicklas ,
> any changes  needed , i'd like to know
> 
> should we put a repro together , might make life easier
> 
> Sarah
> 
> On 2 January 2017 at 18:34, Nicklas Karlsson 
> wrote:
> 
> > Me is novice on EDM but it seems you know what you are doing. I got
> > digital outputs connected on machine this weekend and will probably be able
> > to test this weekend.
> >
> > I have made my own servo drivers with interpolated position mode, response
> > is fast even though I have not yet perfected control loop. I read thru
> > books right now to get control loop as good as possible.
> >
> > If anyone else want interpolated position mode I could help modify
> > linuxcnc protocol, modification is simple.
> >
> >
> > On Mon, 2 Jan 2017 23:53:55 +0700
> > TJoseph Powderly  wrote:
> >
> > > Hello
> > > video of early iteration of edm panel in use
> > > https://videobin.org/+fe8/jab.html
> > > i think an example of reading the db file needs to be done soon
> > > but a working model is better than just thinkin'
> > > thanks
> > > tomp tjtr33
> > >
> > >
> > >
> > > 
> > --
> > > Check out the vibrant tech community on one of the world's most
> > > engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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> >
> > 
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> >
> 
> 
> 
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Re: [Emc-users] corcom's site a blank, no data on any of their filters

[Ken Strauss]

I sent you a data sheet.

> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Thursday, January 05, 2017 3:20 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] corcom's site a blank, no data on any of their
filters
>
> Greetings folks;
>
> Does anyibe know where I can find data, loss vs frequency graphs etc, for
a
> Corcom 20VSK6 line filter? I now have 2 of them warming up.
>
> Thanks all.
>
> 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] question on emi filters

[Gene Heskett]

On Thursday 05 January 2017 13:08:54 Jon Elson wrote:

> On 01/04/2017 10:07 PM, Gene Heskett wrote:
> > I can't think of a thing in that whole kit that would be
> > switching at 335 KHz. Except the regulator in the pi's
> > power input.
>
> Trust nothing. 

A  lesson I am expensively learning.
> LCD monitors, especially with CCFL 
> backlight, are huge noise sources.

This is an led model I just bought. An AOC (cheap at half the walmart 
price) though. But you may be correct in that some of those coaxial half 
shells on the cabling might be a good test.

> Take a small coil (solenoid type, not toroid) and hook it to
> a scope probe.  Then, wave it around the equipment looking
> for the expected frequency.  You should be able to quickly
> locate the source of the noise.
>
> That doesn't solve it, of course, but at least once you know
> which UNIT is producing it, you should be able to swap out
> that unit for a different model.

Or insert some longitudinal ferrite blockers.

> Jon

Sounds like a plan Jon, thanks.

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] rtai on 12.04 Ubuntu

[dave]

With  some help from Kent this turns out to be not too onerous.

Boot your system and on the boot menu note which kernel you want ( by 
number ) starting with 0.
Ditto if you are in the alternate menu.

#modify /etc/default/grub

$cd /etc/default
sudo vim grub
change GRUB_DEFAULT=0 to GRUB_DEFAULT="n"   or if in alternate menu 
to GRUB_DEFAULT="2>n"
save and exit vim

# or in main menu just GRUB_DEFAULT="count-1"
# in alternate menu = "line number of alternate menu in main 
menu>count-1 in menu"

#update grub.cfg
sudo update-grub

#reboot
sudo shutdown -r now

# or you can select the kernel like this by string.
#GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
#where n is the entry you want (count -1).

#For the original menu I think you can omit the n> and go with it.
#remember anytime you change /etc/default/grub you need  to update grub. 
Don't ask me
#how I know.

Now it is up to someone good with good documentation skills to make 
certain this is understandable and get it into the docs.

HTH




On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
> On 01/03/2017 04:47 PM, dave wrote:
>> Re:
>> http://linuxcnc.org/docs/html/getting-started/getting-linuxcnc.html#_installing_on_ubuntu_precise
>>
>> The instructions for the install are nicely done. I tried it both by
>> typing individual lines and  by enclosing the block of instructions in {}.
>> Seemed to work either way but no joy on uname -r |  uname -a.
>>
>> Apparently grub does not get updated by the install and therefore one
>> boots into the ...generic.
>> I've pretty well worked my way thru  grub but need to weed the list to a
>> generic, generic(recovery) and
>> rtai.  Rtai comes up on a secondary list and I need to change that.
>>
>> Not complaining just a heads up. Nice to have it all laid out.
> If you figure out a clear way to describe the changes needed to the GRUB
> config, an update to the docs would be much appreciated!
>
>


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[Emc-users] corcom's site a blank, no data on any of their filters

[Gene Heskett]

Greetings folks;

Does anyibe know where I can find data, loss vs frequency graphs etc, for 
a Corcom 20VSK6 line filter? I now have 2 of them warming up.

Thanks all.

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] question on emi filters

[Jon Elson]

On 01/04/2017 10:07 PM, Gene Heskett wrote:
> I can't think of a thing in that whole kit that would be 
> switching at 335 KHz. Except the regulator in the pi's 
> power input.
Trust nothing.  LCD monitors, especially with CCFL 
backlight, are huge noise sources.
Take a small coil (solenoid type, not toroid) and hook it to 
a scope probe.  Then, wave it around the equipment looking 
for the expected frequency.  You should be able to quickly 
locate the source of the noise.

That doesn't solve it, of course, but at least once you know 
which UNIT is producing it, you should be able to swap out 
that unit for a different model.

Jon

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Re: [Emc-users] Inverting the PWM signal to mesa 7i78

[Cecil Thomas]

Thanks again Andy.  It worked.

Even thought my speed control (mc-60) is cheap 
and low-tech, I am able to make the speed track 
better than  +/- 5%  from 20 to 1200 rpm under 
reasonable thread cutting loads.  That ain't bad for recycled junk.

This exercise with the 5i25 and 7i78 has forced 
me to get a whole lot deeper into understanding 
the concepts and syntax involved in hm2 and hal.

That is a good...but sometimes humbling... thing.

Cecil

At 10:54 AM 1/2/2017, you wrote:
>On 2 January 2017 at 15:47, andy pugh 
> wrote: > There is a 
>slightly better set of docs here: > 
>http://linuxcnc.org/docs/devel/html/drivers/hostmot2.html  
> > But it is very much out-of date. One way in 
>which is is out of date is in insisting that 
>only step-dir mode is supported by the driver, 
>whereas it is now possible to use all the modes 
>up to and including a 6-pin 16-step table 
>generated mode. -- 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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>Check out the vibrant tech community on one of 
>the world's most engaging tech sites, 
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