Re: [Emc-users] Tool Length Offset?

[Pavel G. Kasyanenko]

Hello!

If we are talking about the Axis I have the same problem. And even more. 
I'm going to rewrite it in the near future.

Best regards,
Pavel

23.12.2016 05:01, Jim Craig пишет:
> I was running a program last night on my milling machine. I was cutting
> air at the time and saw something that I did not like. I hit the stop
> button in gmoccapy and the program stopped but then the tool plunged
> downward in the z direction. I found this very odd. I took a look at the
> tool offset and it was saying 0.000 in. Once again very odd. I played
> around with it for a little bit and found that when I hit stop then the
> tool length offset would be removed. Then this caused the machine to
> plunge for some reason.
>
> Luckily it did no damage since I was far enough above the part to not
> cause a crash.
>
> I have tried to reproduce this same behavior in a sim configuration in
> 2.7.8 but I cannot 100%. If you change the G49 G43 option the tool will
> show as moving on the screen but it is moving instantly as the change is
> being made. No real plunge occurring, or is it? Was this a glitch in
> 2.7.4? If not what could cause this behavior?
>
> Thanks,
>
> Jim
>
>
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Re: [Emc-users] g-code database

[TJoseph Powderly]

Nicklas

On 12/25/16 23:30, Nicklas Karlsson wrote:
> Then trying to figure which g-codes or more precise *-codes in general could 
> be useful for EDM I started to write a database of codes for different 
> machines. I currently covered Linuxcnc and Sodick wire EDM. PDF-file is 
> attached and I may send openoffice database file if anobody want.
>
> A database is useful because it could be viewed in several "directions" and 
> searched. Storage is not yet perfect but then it is I guess it would be good 
> to have among the documentation.
>
>
> I have a few m-codes suitable for EDM machining but they are all in the user 
> defined area M100-M199. It would be good to use more or less standard codes. 
> I also have N-codes for old Agiecut.
>
> Could anyone point towards *.codes for other machines?
ask at cnc-zone
http://www.cnczone.com/forums/archive/index.php/f-644.html
>
> Nicklas Karlsson
>
>
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Re: [Emc-users] EDM machining, g-code

[TJoseph Powderly]

the edm gcodes are _usually_ fanuc like while the machines position
the mcodes are _not_ similar , these are machine design specific, there 
are similar functions but the codes will be different characters and 
different devices

especially the codes related to the edm power settings ( current voltage 
on off times )
usually these are encoded

for example 12 amperes of current
can be "1/2 channel' in Charmilles
or 4 in AGie ( 3 amps per transistor)
or 12 in my Heidenhain control ( i like to be literal )

for example a single surface finish
would be VDI in european machines
and Ra in Asian machines
and RMS in USA machines ( really silly to use average on a random surface )

what I'm saying is the units of measure vary from manufacturer to 
manufacturer
and the methods used to 'turn them on' varies ( not always gcode nor 
mcode, sometimes a mark in a table on screen!)
and some units of measures are invented by the manufacturer

making sense of the babel of technology CAN be done
in order to make my own technology
i would have to cut thousands of combinations to prove my values were 
true to some curve
i took years to discover that all edm technologies were really the same
just presented in each manufacturere's own specialized terminology
i formulated power curves ( joules ) for each material combination, 
polarity, open voltage
then compared mine to these manufacturers to see if the curves match
they do
so you can predict the overburn and surface finish
given the 'real meaning' of a manufacturer when they say
on time was 0.2a, off time was 22%, current was 1a+2.3
which really meant
on time 12.5uS, off time was 7uS, current was 6.5 amperes in dead short
These simple real data along with the no-load voltage can determine the 
joules of energy dispersed in a good discharge
the joules determine the diameter and depth of crater in a given material
the frequency ( derived from on & off times ) determine the ideal 
removal rate and wear rate (Vw & Ve )

the best technologies for easy understanding are from Handsvedt ( real 
units of measure )
the best explanations are from AGie ( tho older docs use Tau, the 
inverse of duty cycle )
the most convoluted, obfuscated (imo) is Mitsubishi ( everything is 
coded to some scale or lookup table )

so, the gcodes are simple when you dont cut
when cutting, they are connected to databases that are highly localized 
dialects

in the end,
knowing how one manufacturer turns on 1.2bar of flushing, or turns on 
hi-speed jump, or adjusts his anti-arc device
does you no good
understanding that he does control it is useful, the magic words he uses 
it only benifits him

dont work too hard on this database,
learning a few other machines is good experience, but the codes wont 
work on your machine
and wont really help a user to use your machine

its better to do LOTS of cutting
for example: you wont understand the code to increase the gain of the 
position control loop ( very common) untill you see it in action
 you wont understand the adjustment of offtime or 
duty cycle till it bites you with a big flash!

in years of teaching edm machines ( fanuc gcode to heidenhain 
conversational to asian fill-in-the-blank screen systems )
i saw operators who were unwilling to learn a new machine, but quickly 
learn my new machine in just hours or at most a couple days.
people is clever!

i just built linuxcnc-sim on this chromebook and will look at you screen 
controls
please tell us more of what you try to control with all those flushing 
controls!
it seems there is magnitude of flush, and type of flush(pressure / 
vacuum), and tank fill and dump
the area 'Settings' could be anything from on & off time to 
cuttime/jumpdistance/frequency.
the 'Command' area is understandable
regards, & merry Christmas
tomp tjtr33
On 12/25/16 21:54, Nicklas Karlsson wrote:
>>> Happen to know any more or less g-codes for these motions? g-codes 
>>> for control of flush? g-codes for control of EDM power source? 
>> ... i uploaded mcodes before with python commands to change edm 
>> generator on/off/current/polarity 
> I could remember I god some g-code suitable for EDM and are looking 
> for them right now. I have entered g-code for Linuxcnc and Sodick wire 
> EDM in a database, there a problem with a few codes. The database 
> could be rather useful if filled in for more machines and put on the 
> web. I have never machined run a machine and think it could be a good 
> start to read thru which codes are available. 
> --
>  
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> Xeon Phi processor-based developer platforms. With one year of Intel 
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> 

Re: [Emc-users] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Gene Heskett]

On Sunday 25 December 2016 17:58:00 Gene Heskett wrote:

> On Sunday 25 December 2016 17:23:08 Chris Albertson wrote:
> > Have you tried typing "sudo  synaptic-pkexec" rather than "
> > synaptic-pkexec" and is your logged in user in the  /etc/sudoers
> > file?
> >
> > Also you can alway just use "apt" or apt-get" for package management
> > at the command prompt.  Much simpler and faster.
>
> Yes it is, no question about that.
>
> But what package? apt apparently has no way to show you whats missing
> that is killing your x. I do have an /etc/init.d/x11-common, which has
> to be running if I want it to display on another machine.  And I do
> have it running that way by putting a 10 in front of the error and
> ferror values in he ini files [joint] settings.
>
> With synaptic its a piece of cake to scroll down the the X stuffs and
> look thru the list for the usual suspects, click, mark install, click
> apply and ok, done. Reboot if needed.
>
> The logs are either non-existant, or silent of any clues that might
> point to a missing package.  And lightdm is installed.
> However, /etc/lightdm/lightdm.conf has an empty [seat] stanza.
>
> Please, you who are running an r-pi, with the x gui working, send me
> the output of
>
>  grep -v '#' /etc/lightdm/lightdm.conf
>
> The one I have doesn't even start a "default seat".
> I've enabled that, and we'll see what logs if any are generated.
>
> Thanks.

Well, with that, and the 3rd option of logging into x chosen in 
raspi-config>boot options, (if I pick the bottom selection there, I do 
not have a mouse, so I can't focus the keyboard on the little terinal 
window it opens) I do get a small terminal in the upper left corner of 
the screen, which is not movable or resizable, but I can run linuxcnc 
from it.

But seriously, I need the output of the above command.  Hum, I'll see if 
I can get it off one of the other sd cards.  Hmm, no diff except it 
doesn't have the default session enabled.  My headache just got worse.

I've had lcnc freeze but the pulldown to quit still works. The power and 
enable buttons are turned off and do not respond to any mouse clicks. So 
there is no way to re-enable anything, only restart it. The watchdog led 
is off on the 7i90 when this happens, so the servo thread is still 
running I think.

All my boys have now checked in and wished us a Merry Christmas, and I 
did get the z motor to move an inch or so, so I am seeing progress, 
which makes me happier.

And I hope you all have had a day suitable to fit the reason for the 
season too.

Thanks everybody.

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] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Gene Heskett]

On Sunday 25 December 2016 17:23:08 Chris Albertson wrote:

> Have you tried typing "sudo  synaptic-pkexec" rather than "
> synaptic-pkexec" and is your logged in user in the  /etc/sudoers
> file?
>
There is now a group called sudoers, and pi is a member of that group.

> Also you can alway just use "apt" or apt-get" for package management
> at the command prompt.  Much simpler and faster.
>
> On Sun, Dec 25, 2016 at 9:11 AM, Gene Heskett  
wrote:
> > Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> > permitted by applicable law.
> > Last login: Sat Dec 24 19:49:11 2016 from coyote.coyote.den
> > pi@raspberrypi:~ $ synaptic-pkexec
> >  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> > Authentication is required to run the Synaptic Package Manager
> > Authenticating as: root
> > Password:
> > polkit-agent-helper-1: pam_authenticate failed: Authentication
> > failure  AUTHENTICATION FAILED ===
> > Error executing command as another user: Not authorized
> >
> > This incident has been reported.
> > pi@raspberrypi:~ $ synaptic-pkexec
> >  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> > Authentication is required to run the Synaptic Package Manager
> > Authenticating as: root
> > Password:
> > polkit-agent-helper-1: error response to PolicyKit daemon:
> > GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for
> > cookie
> >  AUTHENTICATION FAILED ===
> > Error executing command as another user: Not authorized
> >
> > This incident has been reported.
> > ==
> > I tried both the root pw and mine.
> >
> > WTHeck is this com.ubuntu.pkexec.synaptic BS?  Of course its wrong,
> > but how can this be fixed so I can run synaptic from a remote login?
> >
> > Or, how do I make this machine accept a display of 10:  ??
> >
> > Thank you all & Merry Christmas everybody
> >
> > 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 
> >
> > 
> >-- Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/intel
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users


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 

--
Developer Access Program for Intel Xeon Phi Processors
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With one year of Intel Parallel Studio XE.
Training and support from Colfax.
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Re: [Emc-users] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Gene Heskett]

On Sunday 25 December 2016 17:23:08 Chris Albertson wrote:

> Have you tried typing "sudo  synaptic-pkexec" rather than "
> synaptic-pkexec" and is your logged in user in the  /etc/sudoers
> file?
>
> Also you can alway just use "apt" or apt-get" for package management
> at the command prompt.  Much simpler and faster.

Yes it is, no question about that.

But what package? apt apparently has no way to show you whats missing 
that is killing your x. I do have an /etc/init.d/x11-common, which has 
to be running if I want it to display on another machine.  And I do have 
it running that way by putting a 10 in front of the error and ferror 
values in he ini files [joint] settings.

With synaptic its a piece of cake to scroll down the the X stuffs and 
look thru the list for the usual suspects, click, mark install, click 
apply and ok, done. Reboot if needed.

The logs are either non-existant, or silent of any clues that might point 
to a missing package.  And lightdm is installed.  
However, /etc/lightdm/lightdm.conf has an empty [seat] stanza.

Please, you who are running an r-pi, with the x gui working, send me the 
output of

 grep -v '#' /etc/lightdm/lightdm.conf

The one I have doesn't even start a "default seat".
I've enabled that, and we'll see what logs if any are generated.

Thanks.
>
> On Sun, Dec 25, 2016 at 9:11 AM, Gene Heskett  
wrote:
> > Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> > permitted by applicable law.
> > Last login: Sat Dec 24 19:49:11 2016 from coyote.coyote.den
> > pi@raspberrypi:~ $ synaptic-pkexec
> >  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> > Authentication is required to run the Synaptic Package Manager
> > Authenticating as: root
> > Password:
> > polkit-agent-helper-1: pam_authenticate failed: Authentication
> > failure  AUTHENTICATION FAILED ===
> > Error executing command as another user: Not authorized
> >
> > This incident has been reported.
> > pi@raspberrypi:~ $ synaptic-pkexec
> >  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> > Authentication is required to run the Synaptic Package Manager
> > Authenticating as: root
> > Password:
> > polkit-agent-helper-1: error response to PolicyKit daemon:
> > GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for
> > cookie
> >  AUTHENTICATION FAILED ===
> > Error executing command as another user: Not authorized
> >
> > This incident has been reported.
> > ==
> > I tried both the root pw and mine.
> >
> > WTHeck is this com.ubuntu.pkexec.synaptic BS?  Of course its wrong,
> > but how can this be fixed so I can run synaptic from a remote login?
> >
> > Or, how do I make this machine accept a display of 10:  ??
> >
> > Thank you all & Merry Christmas everybody
> >
> > 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 
> >
> > 
> >-- Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/intel
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users


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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With one year of Intel Parallel Studio XE.
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Re: [Emc-users] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Chris Albertson]

Have you tried typing "sudo  synaptic-pkexec" rather than "
synaptic-pkexec" and is your logged in user in the  /etc/sudoers
file?

Also you can alway just use "apt" or apt-get" for package management
at the command prompt.  Much simpler and faster.

On Sun, Dec 25, 2016 at 9:11 AM, Gene Heskett  wrote:
> Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
> permitted by applicable law.
> Last login: Sat Dec 24 19:49:11 2016 from coyote.coyote.den
> pi@raspberrypi:~ $ synaptic-pkexec
>  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> Authentication is required to run the Synaptic Package Manager
> Authenticating as: root
> Password:
> polkit-agent-helper-1: pam_authenticate failed: Authentication failure
>  AUTHENTICATION FAILED ===
> Error executing command as another user: Not authorized
>
> This incident has been reported.
> pi@raspberrypi:~ $ synaptic-pkexec
>  AUTHENTICATING FOR com.ubuntu.pkexec.synaptic ===
> Authentication is required to run the Synaptic Package Manager
> Authenticating as: root
> Password:
> polkit-agent-helper-1: error response to PolicyKit daemon:
> GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for
> cookie
>  AUTHENTICATION FAILED ===
> Error executing command as another user: Not authorized
>
> This incident has been reported.
> ==
> I tried both the root pw and mine.
>
> WTHeck is this com.ubuntu.pkexec.synaptic BS?  Of course its wrong, but
> how can this be fixed so I can run synaptic from a remote login?
>
> Or, how do I make this machine accept a display of 10:  ??
>
> Thank you all & Merry Christmas everybody
>
> 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 
>
> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



-- 

Chris Albertson
Redondo Beach, California

--
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Re: [Emc-users] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Jon Elson]

On 12/25/2016 11:11 AM, Gene Heskett wrote:
> On Saturday 24 December 2016 15:59:31 Chris Albertson wrote:
>
>> Read the little write up at the Mesa site about cable length.   They
>> claim ribbon cable is the worst and to only use it for very short
>> runs, 2 or 3 feet at most. They suggest using "real" parallel
>> cables made with twisted pairs and shielding for longer runs.  Using
>> one of their fancy IEEE cables you can go up to 25 or 30 feet, half
>> that with a normal round cable and half that again with ribbon cable.
>>
>
I have made up a number of special-purpose cables for 
interfacing parallel ports to things, including the HPIB 
bus.  You can take the twisted-pair ribbon cable and 
hand-wire the signals and grounds to appropriate pins, and 
get excellent operation up to 25 or more feet.  Every signal 
gets a pair of wires, one signal and one ground.
But, making these is tedious.

Jon

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Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

[Chris Albertson]

Comments re. below

1) "Everyone" already puts grounds between every signal in ribbon
cable.   All the limits you read are already assuming you have done
that.   So still about 30 inches max.

>> Differential signal is the best but I do not how big difference will be 
>> against
>> ground in one of the pins instead. For signal   conversion I think RS-422
>> transciver/receiver is the choice, they are also readily available in 
>> different speeds.
>>  Ethernet  cable is twisted pair and readily available.

Ethernet is not only differential  it is galvanically isolated, a
transformer is used at each end

The difference in performance is dramatic.  A single ended (ground
reference) signal can go about 10 meters and maybe up to 2 MHz,   As
we see with Ethernet a differential baseband signal goes up to 100
meters at 1Ghz.  That is 500X faster and 10X farther.  All modern
interfaces are differential, USB, Ethernet, Thunderbolt, SATA and so
on.

But differential will not help in this case.  The OP has parallel
printer port data to move.   My suggestion is to just don't do that.
Use a very short parallel cable, just a few inches and make the high
voltage motor cables as long as needed.   Yes this costs more because
those cables need to use thicker gauge conductors.   12 Ga, or even
larger duplex wire is easy to find.



On Sun, Dec 25, 2016 at 3:04 AM, Nicklas Karlsson
 wrote:
>> > ...
>>
>> You are right, ribbon cables are not very good at carrying signals over
>> long cables. They will pick up too much noise if not shielded and suffer
>> often from significant cross-talk if too long.
>
> A trick is to put ground in half of them, either odd or even. Then of course 
> they get twice as expensive.
>
>> The "standard" old-school printer cables (the round ones) are often
>> shielded and twisted pair, which are actually quite good.
>
> Twisted pair is the best.
>
>>
>>
>> > For over 30 feet use some kind of differential signaling or fiber.
>>
>> Differential signaling or fiber is of course better, but very much more
>> expensive. You will also need to convert the signals on each end.
>
> Differential signal is the best but I do not how big difference will be 
> against ground in one of the pins instead. For signal conversion I think 
> RS-422 transciver/receiver is the choice, they are also readily available in 
> different speeds. Ethernet cable is twisted pair and readily available.
>
> --
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> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
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-- 

Chris Albertson
Redondo Beach, California

--
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Re: [Emc-users] EDM machining, g-code

[Gene Heskett]

On Sunday 25 December 2016 14:48:35 Nicklas Karlsson wrote:

> You only used Linuxcnc? Or do you have other g-codes or *-codes?
>
Thats it, I was the intelligence adjusting the feed rate to keep the 
average current between 1 and 2 amps. :)

> On Sun, 25 Dec 2016 14:30:19 -0500
>
> Gene Heskett  wrote:
> > On Sunday 25 December 2016 09:54:37 Nicklas Karlsson wrote:
> > > > > Happen to know any more or less g-codes for these motions?
> > > > > g-codes for control of flush? g-codes for control of EDM power
> > > > > source?
> > > >
> > > > ...
> > > > i uploaded mcodes before with python commands to change edm
> > > > generator on/off/current/polarity
> > >
> > > I could remember I god some g-code suitable for EDM and are
> > > looking for them right now.
> > >
> > > I have entered g-code for Linuxcnc and Sodick wire EDM in a
> > > database, there a problem with a few codes. The database could be
> > > rather useful if filled in for more machines and put on the web.
> > >
> > > I have never machined run a machine and think it could be a good
> > > start to read thru which codes are available.
> >
> > What I have done with edm is strictly shade tree mechanics, and has
> > used a spinning electrode once with k2 as the dielectric, and the
> > last time with distilled water, which because I was emulating a
> > slitting saw with a thin sheet of brass about 3" OD, just used a
> > very slow feed rate. It took around 30 minutes with the brass
> > spinning at about 150 revs, to make each of the slots I cut in a
> > piece of 1/2" A2 rod, about .8" deep, rotating the workpiece to the
> > next nut flat for an angle reference.
> >
> > This was nearly the last operation after using G76 with a length of
> > cut taper, to make 50 tpi tapered threads on the shaft, and in a
> > nut. The shaft was bored to accept the end of a small ball screw, as
> > is, threads and all, it was inserted into the end of the A2, and the
> > nut drawn up quite tight so the A2 is compressed onto the screw with
> > a death grip. Its driving the x axis screw in the sheldon 11x36
> > conversion I am doing. All sealed up with green threadlocker, if it
> > ever fails, I can make another, maybe even with a bigger screw if I
> > can find one whose nut would have a threaded mount on one end.  No
> > room for the usual nuts flange in the x axis.
> >
> > The first time I was removing two broken 6x32 taps, and while it
> > worked, I had no way to flush the hole, so each hole had to be blown
> > clean with carb cleaner about 20 times because that K2 was so
> > contaminated it was still a short when the electrode had been
> > withdrawn 100 thou. Can you spell PITA?  But I did get the job done
> > and the part salvaged, its the post extension on my toy mill.
> >
> > Thats my story and I'm sticking to it. ;-)
> >
> > > --
> > >  Developer Access Program for Intel Xeon Phi
> > > Processors Access to Intel Xeon Phi processor-based developer
> > > platforms. With one year of Intel Parallel Studio XE.
> > > Training and support from Colfax.
> > > Order your platform today.http://sdm.link/intel
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > 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 
> >
> > 
> >-- Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/intel
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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 

--
Developer Access Program for Intel Xeon Phi Processors
Access 

Re: [Emc-users] g-code database

[Gene Heskett]

On Sunday 25 December 2016 12:42:51 Nicklas Karlsson wrote:

> Yes indeed it would and I could or really should change this.
>
> I however do not have anywhere to store so that it could be accessed
> via pulic access to internet.

That is not so hard to do. Two things need to work, actually 3.

1. Your local network should be protected from the drive by kids, and the 
best way to do that is with a router, cabled between your modem, and an 
8 port switch. The switch needn't be a special, but the router will need 
the flash memory resources to allow you to reflash its firmware with 
something like dd-wrt, whose source is German and has NO "back doors" 
for any spook agency.  Its firewall is penetrable only by its own NAT 
rules. Look at my sig. That Port Forward is to this machine, and apache2 
listens to that port. Nothing else I didn't ask for gets thru that 
routers firewall. Nda, zero Zip. And in the time I have been running 
dd-wrt, only  one person has gotten thru it, a friend of mine whose a 
better network guru than I am.  And I had to give him the passwords.
So my whole home network, is running in a class d block in the reserved 
range of 192.168.xx.yy, which routers do NOT forward unless configured 
to do so, even then they cannot forward to another 192.168.xx.yy 
address.

2. Your local network, to simplify things, should be /etc/hosts file 
based, and this /etc/hosts file should contain a list of addresses, one 
per line, in the format of address(tab)FQDN(tab)alias alias alias. Mine 
is around 18 lines now because of all the localhost stuff there by 
default.

3. I like static addresses so I can remember each machines address if the 
lookup fails.

Since network-destroyer will tear down if it can, no later than the next 
reboot, by overwriting the next two files if it can, its important to do 
as root, a chattr +i path/to/file as soon as you are finished with the 
write and close of the next 2 files.
First, as root nano /etc/network/interfaces
=this is mine adjust yours using this format===
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

auto lo

# The loopback network interface
iface lo inet loopback
address 127.0.0.1
netmask 255.255.255.0

auto eth0

# regular network for coyote.den
iface eth0 inet static
address 192.168.71.3
netmask 255.255.255.0
gateway 192.168.71.1

auto eth0:1

# to access reset to 192.168.0.1 routers/switches on the 2nd cat5 port
iface eth0:1 inet static
address 192.168.0.3
netmask 255.255.255.0
==
the last, eth0:1 is so I can access a router that has been reset to 
defaults.

Don't forget to chattr +i as soon as its written
Then cat it to check for typo's, or network-mangler damages,
If its screwed chattr -i and re-edit it.

Then still as root, nano /etc/resolv.conf and make it read:

nameserver 192.168.xx.1 (where xx is your local networks 3rd set of 
numbers)
order hosts,dns (or order hosts,nameserver either seems to work fine)

Write it, close nano, and chattr +i /etc/resolv.conf. cat it to be sure 
its correct.

if on jessie, do 'systemctl daemon-reload', endif 
then /etc/init.d/networking restart
ifconfig eth0
check to see if the local addess is correct, if not, do another 
networking restart, I've had to do it twice a couple times.  

get out of root with a ctl+d, then ping -c3 one of your other local 
machines.

If one doesn't work, make sure its on, the net cable is plugged in and 
you don't have any typu's in your editing. If that works, try all the 
other machines on your local net.

Then to test the router, ping -c3 yahoo.com.

You should now have full access to the world net, and if you turned the 
routers ping response from an outside address off, you are as close to 
invisible to the rest of the worlds script kiddies as you can be.  Sleep 
well.
 
It is not that hard to do and I am 82.

Oh, if the link in my sig doesn't work, pm me. I can't test it from 
inside my local network without using my local address. I have to access 
that from my local address at that port number.

> Obviously there need to be more dialects 
> added.
>
> Some *-codes only make sense for certain machines, cuttning tool
> parameters and others. I could try to figure some extra fields for
> this.
>
>
>
>
> On Sun, 25 Dec 2016 16:42:58 +
>
> Dave Caroline  wrote:
> > It perhaps would be useful as a .sql file so it can be placed in a
> > mysql/web database
> >
> > Dave Caroline
> >
> > 
> >-- Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/intel
> > ___
> > Emc-users mailing list
> > 

Re: [Emc-users] EDM machining, g-code

[Nicklas Karlsson]

You only used Linuxcnc? Or do you have other g-codes or *-codes?

On Sun, 25 Dec 2016 14:30:19 -0500
Gene Heskett  wrote:

> On Sunday 25 December 2016 09:54:37 Nicklas Karlsson wrote:
> 
> > > > Happen to know any more or less g-codes for these motions? g-codes
> > > > for control of flush? g-codes for control of EDM power source?
> > >
> > > ...
> > > i uploaded mcodes before with python commands to change edm
> > > generator on/off/current/polarity
> >
> > I could remember I god some g-code suitable for EDM and are looking
> > for them right now.
> >
> > I have entered g-code for Linuxcnc and Sodick wire EDM in a database,
> > there a problem with a few codes. The database could be rather useful
> > if filled in for more machines and put on the web.
> >
> > I have never machined run a machine and think it could be a good start
> > to read thru which codes are available.
> >
> What I have done with edm is strictly shade tree mechanics, and has used 
> a spinning electrode once with k2 as the dielectric, and the last time 
> with distilled water, which because I was emulating a slitting saw with 
> a thin sheet of brass about 3" OD, just used a very slow feed rate. It 
> took around 30 minutes with the brass spinning at about 150 revs, to 
> make each of the slots I cut in a piece of 1/2" A2 rod, about .8" deep, 
> rotating the workpiece to the next nut flat for an angle reference.
> 
> This was nearly the last operation after using G76 with a length of cut 
> taper, to make 50 tpi tapered threads on the shaft, and in a nut. The 
> shaft was bored to accept the end of a small ball screw, as is, threads 
> and all, it was inserted into the end of the A2, and the nut drawn up 
> quite tight so the A2 is compressed onto the screw with a death grip. 
> Its driving the x axis screw in the sheldon 11x36 conversion I am doing.  
> All sealed up with green threadlocker, if it ever fails, I can make 
> another, maybe even with a bigger screw if I can find one whose nut 
> would have a threaded mount on one end.  No room for the usual nuts 
> flange in the x axis.
> 
> The first time I was removing two broken 6x32 taps, and while it worked, 
> I had no way to flush the hole, so each hole had to be blown clean with 
> carb cleaner about 20 times because that K2 was so contaminated it was 
> still a short when the electrode had been withdrawn 100 thou. Can you 
> spell PITA?  But I did get the job done and the part salvaged, its the 
> post extension on my toy mill.
> 
> Thats my story and I'm sticking to it. ;-)
> 
> > --
> > Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/intel
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 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 
> 
> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users

--
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
___
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Re: [Emc-users] EDM machining, g-code

[Gene Heskett]

On Sunday 25 December 2016 09:54:37 Nicklas Karlsson wrote:

> > > Happen to know any more or less g-codes for these motions? g-codes
> > > for control of flush? g-codes for control of EDM power source?
> >
> > ...
> > i uploaded mcodes before with python commands to change edm
> > generator on/off/current/polarity
>
> I could remember I god some g-code suitable for EDM and are looking
> for them right now.
>
> I have entered g-code for Linuxcnc and Sodick wire EDM in a database,
> there a problem with a few codes. The database could be rather useful
> if filled in for more machines and put on the web.
>
> I have never machined run a machine and think it could be a good start
> to read thru which codes are available.
>
What I have done with edm is strictly shade tree mechanics, and has used 
a spinning electrode once with k2 as the dielectric, and the last time 
with distilled water, which because I was emulating a slitting saw with 
a thin sheet of brass about 3" OD, just used a very slow feed rate. It 
took around 30 minutes with the brass spinning at about 150 revs, to 
make each of the slots I cut in a piece of 1/2" A2 rod, about .8" deep, 
rotating the workpiece to the next nut flat for an angle reference.

This was nearly the last operation after using G76 with a length of cut 
taper, to make 50 tpi tapered threads on the shaft, and in a nut. The 
shaft was bored to accept the end of a small ball screw, as is, threads 
and all, it was inserted into the end of the A2, and the nut drawn up 
quite tight so the A2 is compressed onto the screw with a death grip. 
Its driving the x axis screw in the sheldon 11x36 conversion I am doing.  
All sealed up with green threadlocker, if it ever fails, I can make 
another, maybe even with a bigger screw if I can find one whose nut 
would have a threaded mount on one end.  No room for the usual nuts 
flange in the x axis.

The first time I was removing two broken 6x32 taps, and while it worked, 
I had no way to flush the hole, so each hole had to be blown clean with 
carb cleaner about 20 times because that K2 was so contaminated it was 
still a short when the electrode had been withdrawn 100 thou. Can you 
spell PITA?  But I did get the job done and the part salvaged, its the 
post extension on my toy mill.

Thats my story and I'm sticking to it. ;-)

> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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 

--
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
___
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Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

[Gene Heskett]

On Sunday 25 December 2016 06:04:51 Nicklas Karlsson wrote:

> > > ...
> >
> > You are right, ribbon cables are not very good at carrying signals
> > over long cables. They will pick up too much noise if not shielded
> > and suffer often from significant cross-talk if too long.
>
> A trick is to put ground in half of them, either odd or even. Then of
> course they get twice as expensive.
>
> > The "standard" old-school printer cables (the round ones) are often
> > shielded and twisted pair, which are actually quite good.
>
> Twisted pair is the best.
>
> > > For over 30 feet use some kind of differential signaling or fiber.
> >
> > Differential signaling or fiber is of course better, but very much
> > more expensive. You will also need to convert the signals on each
> > end.
>
> Differential signal is the best but I do not how big difference will
> be against ground in one of the pins instead. For signal conversion I
> think RS-422 transciver/receiver is the choice, they are also readily
> available in different speeds. Ethernet cable is twisted pair and
> readily available.
>
In this case, we are talking about a data rate (baud) in the 32 MHz 
range. I have some 422 adaptors, intending to play with them at some 
point, but have doubts they can run that fast as they are usb driven 
from the computer.

> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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 

--
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
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Re: [Emc-users] g-code database

[Nicklas Karlsson]

Yes indeed it would and I could or really should change this.

I however do not have anywhere to store so that it could be accessed via pulic 
access to internet. Obviously there need to be more dialects added.

Some *-codes only make sense for certain machines, cuttning tool parameters and 
others. I could try to figure some extra fields for this.




On Sun, 25 Dec 2016 16:42:58 +
Dave Caroline  wrote:

> It perhaps would be useful as a .sql file so it can be placed in a
> mysql/web database
> 
> Dave Caroline
> 
> --
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/intel
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users

--
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Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
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Re: [Emc-users] Allowable length of db25 interconnect cabling to talk to an epp version of a 7i90?

[Gene Heskett]

On Saturday 24 December 2016 15:59:31 Chris Albertson wrote:

> Read the little write up at the Mesa site about cable length.   They
> claim ribbon cable is the worst and to only use it for very short
> runs, 2 or 3 feet at most. They suggest using "real" parallel
> cables made with twisted pairs and shielding for longer runs.  Using
> one of their fancy IEEE cables you can go up to 25 or 30 feet, half
> that with a normal round cable and half that again with ribbon cable.
>
That would be about 6 feet, I'd assume src terminated. Mesa's cables, 
with plugs attached, I'd have to figure out how to get the plug past the 
3/4" holes presently in the box.  Even the ribbon that wide would need 
be to excavate and find some GreenLee punches I haven't used in 20 some 
years.

> For over 30 feet use some kind of differential signaling or fiber.
>
> There is nothing inherently bad about ribbon cable.  It is more about
> how it is driven.  It works well as a 50 ohm transition line if you
> terminate it at each end.  The old SCSI disk drives did that.

But not at 50 0hms! That ribbon cable, assuming every other wire is 
ground, has an impedance in the high tolerance end of 120 ohms. Assuming 
well by passed supply rails, the 220 from the signal line up to the 5 
volt rail, in parallel with the 330 to ground, simulates a 132 ohm 
parallel termination on each end.  Under ideal conditions the cable 
length limit is said to be 39 meters!

But that has one huge gotcha that the bean counters between engineering 
and the production floor, busy counting sheckles, substituted an Si 
diode for the schottky the engineers specified for the rail isolator, 
thereby dropping the nominally 5 volt bus, which should rest a logic 1  
at 3 volts, to about 2.6 volts, eating 400 mv of the logic 1's 600mv 
noise margin. Back in the day, when every midmarket tv station had half 
a dozen Amiga's doing graphics work, and crashing due to scsi bus 
errors, I had to fix every damned scsi card we ever put in an Amiga. And 
one of the two we had in pc's. No exceptions in the Amiga's. And I found 
some mistakes that were real hooodooozies.  Like the term resistor packs 
all installed end for end.  Or all the 6.3 volt electrolytic's installed 
on the 5 volt rails soldered in bas ackwards.  Surprisingly, those caps 
will last about a year that way, so by the time they start blowing their 
tops, any warranty of a $1500 68060 card was long expired.

Theres an awful lot of such stuff I've had to fix in the 66+ years I've 
chased electrons for a living, and at 82, I am still doing it 
occasionally. But understandably getting rusty too. So I ask lots of 
questions now. :)

> But 
> there is an upper limit on how fast you can push data down a parallel
> cable. This is why all the really fast computer interfaces are now
> serial
>
> Your problem might be because you are doing to much at once.  Can you
> get a one axis stepper motor to run slowly using GPIO and no FPGA
> card?  Does that work reliably through multiple upgrades and config
> changes or is it fragile?  Or even before that, can you install and
> update Linux and compile kernels and instal new drivers and run a web
> browsers and email and do upgrades and such reliably before using 
> RPi3 as a machine controller.

At this time, I would have to say that its damned fragile.

This msg sat behind the main window while I played a bit last night, and 
made it run with x remoted to this machine.  And I am seeing a data 
error that is causing it to throw joint errors, including a joint that 
is yet open pins on the 7i90 output connectors.

I am thinking that a study of the 7i90 pdf might have a clue, because the 
7i90 is still jumpered as shipped, but the r-pi is feeding it only a 3.3 
volt signal. (assumed, I have not pulled out the sampler and measured 
it, so I suppose thats next) In previous playing a month ago, I found if 
I could keep it moving the z axis at a typical rapid move rate, it did 
not throw the joint error while the z was moving. Only after it had 
stopped, did it error, always both joints. So IMO it almost has to be 
signal level caused data errors. The interconnect cable I made has all 8 
of the available grounds on the pi's 40 pin header, connected thru to 
the 8 available grounds of the 7i90's 26 pin connector. And with the box 
cover carrying the pi and 7i90 on its inside face held open, I cannot 
see radiated noise from the z axis driver, or its switching psu, getting 
back into the pi by any means than a possible ground loop.

Thats problem #1.

The second problem is that I can't make x run on the pi.  And without 
synaptic I can't see whats missing. It opens a black screen with what 
almost looks like a prompt at the upper left corner, but thats as far as 
it gets, and any recovery must be done from a login from one of the 
other machines here. But an xhost + in the terminal tab I am going to 
log in from, fails to allow me to run a package manager other than apt.

Screen 

Re: [Emc-users] g-code database

[Dave Caroline]

It perhaps would be useful as a .sql file so it can be placed in a
mysql/web database

Dave Caroline

--
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
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[Emc-users] g-code database

[Nicklas Karlsson]

Then trying to figure which g-codes or more precise *-codes in general could be 
useful for EDM I started to write a database of codes for different machines. I 
currently covered Linuxcnc and Sodick wire EDM. PDF-file is attached and I may 
send openoffice database file if anobody want.

A database is useful because it could be viewed in several "directions" and 
searched. Storage is not yet perfect but then it is I guess it would be good to 
have among the documentation.


I have a few m-codes suitable for EDM machining but they are all in the user 
defined area M100-M199. It would be good to use more or less standard codes. I 
also have N-codes for old Agiecut.

Could anyone point towards *.codes for other machines?


Nicklas Karlsson


g-codes.pdf
Description: Adobe PDF document
--
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Re: [Emc-users] EDM machining, g-code

[Nicklas Karlsson]

> > Happen to know any more or less g-codes for these motions? g-codes for 
> > control of flush? g-codes for control of EDM power source?
> ...
> i uploaded mcodes before with python commands to change edm generator 
> on/off/current/polarity

I could remember I god some g-code suitable for EDM and are looking for them 
right now.

I have entered g-code for Linuxcnc and Sodick wire EDM in a database, there a 
problem with a few codes. The database could be rather useful if filled in for 
more machines and put on the web.

I have never machined run a machine and think it could be a good start to read 
thru which codes are available.

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Re: [Emc-users] Allowable length of db25 interconnect cabling --> ribbon cable

[Nicklas Karlsson]

> > ...
> 
> You are right, ribbon cables are not very good at carrying signals over
> long cables. They will pick up too much noise if not shielded and suffer
> often from significant cross-talk if too long.

A trick is to put ground in half of them, either odd or even. Then of course 
they get twice as expensive.

> The "standard" old-school printer cables (the round ones) are often
> shielded and twisted pair, which are actually quite good.

Twisted pair is the best.

> 
> 
> > For over 30 feet use some kind of differential signaling or fiber.
> 
> Differential signaling or fiber is of course better, but very much more
> expensive. You will also need to convert the signals on each end.

Differential signal is the best but I do not how big difference will be against 
ground in one of the pins instead. For signal conversion I think RS-422 
transciver/receiver is the choice, they are also readily available in different 
speeds. Ethernet cable is twisted pair and readily available.

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