Re: [Emc-users] 7i76 and spindle control

[andy pugh]

On 26 September 2014 04:28, Peter C. Wallace  wrote:

> The 7I76 spindle analog out circuitry expects a regulated 5V to 12V supply,
> your supply has about 10K Ohms of series resistance so is not a suitable
> voltage source. You can use an isolated external supply of 5 to 12V

It might be important to stress "isolated" there. The KBIC controller
float the pot at +100 volts or so.

One solution is probably a small 12V - 12V isolated DC-DC converter
connected to the normal 12V DC.

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Re: [Emc-users] using 7i43 as a stepper controller

[andy pugh]

On 22 September 2014 00:13, Condit Alan  wrote:

> I have seen some recommendations talking about setting up the stepgens for 
> the 7i43 for velocity mode. Does this require encoders on the steppers?

I just found this message in the spam folder (in fact, all your
messages go there, because of Yahoo).
Typically you would use velocity-mode when the steppers are part of a
closed-loop system. It would work with encoders on the steppers, and
possibly even better when combined with linear scales.

There may be other applications, what were the links where you saw it suggested?

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Re: [Emc-users] 7i43 to control spindle speed

[andy pugh]

On 22 September 2014 00:22, Condit Alan  wrote:

> I have seen recommendations about using a stepgen instead of a PWMgen. Which 
> would be the better choice? Why?

The 7i43 on my 9x20 uses a PWMgen. (I think it might be in PDM mode in
actuality). A stepgen is only appropriate if using
frequency-to-voltage.

A suggested output circuit is:
https://picasaweb.google.com/108164504656404380542/CNCUnsorted#6013253785596056210
though I see you already have one.

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[Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

See subject, for a change this hits ALL the non-windows systems.

So update your bash everywhere and reboot them ASAP.

Cheers, Gene Heskett
-- 
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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[andy pugh]

On 26 September 2014 13:29, Gene Heskett  wrote:
> See subject, for a change this hits ALL the non-windows systems.

"Shellshock" seems like a better search term.

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Re: [Emc-users] 7i76 and spindle control

[Gene Heskett]

On Friday 26 September 2014 05:58:37 andy pugh did opine
And Gene did reply:
> On 26 September 2014 04:28, Peter C. Wallace  wrote:
> > The 7I76 spindle analog out circuitry expects a regulated 5V to 12V
> > supply, your supply has about 10K Ohms of series resistance so is
> > not a suitable voltage source. You can use an isolated external
> > supply of 5 to 12V
> 
> It might be important to stress "isolated" there. The KBIC controller
> float the pot at +100 volts or so.

I'll add even more emphasis to this warning.  We tend to forget that which 
Just Works(TM)
 
> One solution is probably a small 12V - 12V isolated DC-DC converter
> connected to the normal 12V DC.

That is another avenue, and a actually a good suggestion as those are 
generally less costly than a line transformer powered solution and 
considerably smaller physically.

Since this circuit generally needs less than 20 milliamps, if no 12 volts 
is available but 5 volts is, there are 5 to 12 converters available too.  
But they MUST BE TRANSFORMER ISOLATED, the charge pump designs have way 
too much leakage coupling due to the use of capacitance for the power 
transfer method.  Leakage that can destroy circuitry if accidentally 
grounded, and kill you if you are the grounding medium. :(

Good advice Andy, thanks.

Cheers, Gene Heskett
-- 
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-Ed Howdershelt (Author)
Genes Web page 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Mark Wendt]

On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett  wrote:

> See subject, for a change this hits ALL the non-windows systems.
>
> So update your bash everywhere and reboot them ASAP.
>
> Cheers, Gene Heskett
>


Yup.  But no need to reboot the machine for the bash update.  All you need
to do is type 'exec bash' on any command line terminals you have open or
log out and log back in.

Mark
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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 08:35:16 andy pugh did opine
And Gene did reply:
> On 26 September 2014 13:29, Gene Heskett  wrote:
> > See subject, for a change this hits ALL the non-windows systems.
> 
> "Shellshock" seems like a better search term.

Yes, my bad.

Cheers, Gene Heskett
-- 
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Genes Web page 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 08:43:58 Mark Wendt did opine
And Gene did reply:
> On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett  wrote:
> > See subject, for a change this hits ALL the non-windows systems.
> > 
> > So update your bash everywhere and reboot them ASAP.
> > 
> > Cheers, Gene Heskett
> 
> Yup.  But no need to reboot the machine for the bash update.  All you
> need to do is type 'exec bash' on any command line terminals you have
> open or log out and log back in.
> 
> Mark

I have several bash scripts that are executed and run forever at boot 
time, so in order to get fresh copies into memory, a reboot is needed 
here.

But its better advice than you might think.  In those systems that have an 
/etc/init.d directory, those are all or nearly all bash scripts regardless 
of their actual name. All of those need to be restarted using the new bash 
to be assured there are no old, susceptible versions in memory.

The point I failed to make the first time.

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Cheers, Gene Heskett
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Genes Web page 
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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Mark Wendt]

On Fri, Sep 26, 2014 at 9:01 AM, Gene Heskett  wrote:

> On Friday 26 September 2014 08:43:58 Mark Wendt did opine
> And Gene did reply:
> > On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett  wrote:
> > > See subject, for a change this hits ALL the non-windows systems.
> > >
> > > So update your bash everywhere and reboot them ASAP.
> > >
> > > Cheers, Gene Heskett
> >
> > Yup.  But no need to reboot the machine for the bash update.  All you
> > need to do is type 'exec bash' on any command line terminals you have
> > open or log out and log back in.
> >
> > Mark
>
> I have several bash scripts that are executed and run forever at boot
> time, so in order to get fresh copies into memory, a reboot is needed
> here.
>
> But its better advice than you might think.  In those systems that have an
> /etc/init.d directory, those are all or nearly all bash scripts regardless
> of their actual name. All of those need to be restarted using the new bash
> to be assured there are no old, susceptible versions in memory.
>
> The point I failed to make the first time.
>


A reboot is still not required.  Simply restart the services.  Or do a
'pkill -HUP '.

Unless you are replacing the kernel on a Linux/Unix machine, there's really
no need to reboot a system for something like this.

Mark
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Re: [Emc-users] 7i76 and spindle control

[John Alexander Stewart]

Andy, Gene - I do have a spare 12v linear regulated supply and a nice small
5v switching sitting by my new mill, was going to prototype with the 5v
first. (KBIC says 0-7v input in voltage follower mode - 0-5v will get me
going)

Interesting about the dc-dc converters; on reading, as Gene says, some are
isolated, some are not.

The local store does have lots of switching power supplies of varying
voltages, and I do have a large metal box for all of this to go into, but I
dislike clutter.

So, I'll see if the local store has a 12v 12v dc isolated  converter that
is small and compact.

I appreciate the isolation warnings; while I do realize that I'm playing
with 110v, 15A here, but it is nice to have the reminder, and also, for
others who may stumble across this thread.

Thank you!  JohnS
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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 09:11:41 Mark Wendt did opine
And Gene did reply:
> On Fri, Sep 26, 2014 at 9:01 AM, Gene Heskett  wrote:
> > On Friday 26 September 2014 08:43:58 Mark Wendt did opine
> > 
> > And Gene did reply:
> > > On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett  
wrote:
> > > > See subject, for a change this hits ALL the non-windows systems.
> > > > 
> > > > So update your bash everywhere and reboot them ASAP.
> > > > 
> > > > Cheers, Gene Heskett
> > > 
> > > Yup.  But no need to reboot the machine for the bash update.  All
> > > you need to do is type 'exec bash' on any command line terminals
> > > you have open or log out and log back in.
> > > 
> > > Mark
> > 
> > I have several bash scripts that are executed and run forever at boot
> > time, so in order to get fresh copies into memory, a reboot is needed
> > here.
> > 
> > But its better advice than you might think.  In those systems that
> > have an /etc/init.d directory, those are all or nearly all bash
> > scripts regardless of their actual name. All of those need to be
> > restarted using the new bash to be assured there are no old,
> > susceptible versions in memory.
> > 
> > The point I failed to make the first time.
> 
> A reboot is still not required.  Simply restart the services.  Or do a
> 'pkill -HUP '.

Chuckle, but then I would have to remember what services were in fact 
running.  With my well aged wet ram, suffering from short term bit rot, 
its easier to just click on restart and restore to the baseline.
 
> Unless you are replacing the kernel on a Linux/Unix machine, there's
> really no need to reboot a system for something like this.

On this machine only, 3.16.0 with PAE support (8Gb of dram) is the current 
favorite.  But that also means the only LCNC that runs is the sim's.  
Nothing in the machine metal hardware category present here, so thats 
adequate.
 
> Mark

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 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[John Dammeyer]

I've heard on the news that Wifi routers running an embedded linux also run
bash and need an upgrade?  Is that true?
John


> -Original Message-
> From: Gene Heskett [mailto:ghesk...@wdtv.com]
> Sent: September-26-14 6:01 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Another new bash update, the previous fix for
> "shockwave" was incomplete
> 
> On Friday 26 September 2014 08:43:58 Mark Wendt did opine
> And Gene did reply:
> > On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett 
> wrote:
> > > See subject, for a change this hits ALL the non-windows systems.
> > >
> > > So update your bash everywhere and reboot them ASAP.
> > >
> > > Cheers, Gene Heskett
> >
> > Yup.  But no need to reboot the machine for the bash update.  All you
> > need to do is type 'exec bash' on any command line terminals you have
> > open or log out and log back in.
> >
> > Mark
> 
> I have several bash scripts that are executed and run forever at boot
> time, so in order to get fresh copies into memory, a reboot is needed
> here.
> 
> But its better advice than you might think.  In those systems that have an
> /etc/init.d directory, those are all or nearly all bash scripts regardless
> of their actual name. All of those need to be restarted using the new bash
> to be assured there are no old, susceptible versions in memory.
> 
> The point I failed to make the first time.
> 
> > ---
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> > 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 
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
> 
>

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Re: [Emc-users] Printing on wall

[Bari]

You'll need more than just a logic analyzer. There is a high voltage 
analog waveform that drives the piezo actuator in each nozzle. The shape 
of the pulses control how the drops and satellites are formed and 
ejected from the nozzles. Piezo heads are more difficult to drive than 
thermal inkjet heads.

Some examples are in these papers:

http://www-kyg.stanford.edu/khuriyakub/opencms/Downloads/03_Percin_02.pdf

http://www.dcsc.tudelft.nl/~xbombois/Amol_mems.pdf

On 09/10/2014 11:05 PM, Gregg Eshelman wrote:
> On 9/10/2014 3:08 AM, Viesturs Lācis wrote:
>> Hello!
>>
>> I was asked about the machine, that basically does this:
>> https://www.youtube.com/watch?v=W6tkotN95PA
>> 1) how to control the Epson head? there are 8 wires going to the head;
> Google "bus pirate". When you get this working, do up a website and send
> the URL to Hackaday. :)
>
>


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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Mark Wendt]

On Fri, Sep 26, 2014 at 10:53 AM, Gene Heskett  wrote:

> On Friday 26 September 2014 09:11:41 Mark Wendt did opine
>
> >
> > A reboot is still not required.  Simply restart the services.  Or do a
> > 'pkill -HUP '.
>
> Chuckle, but then I would have to remember what services were in fact
> running.  With my well aged wet ram, suffering from short term bit rot,
> its easier to just click on restart and restore to the baseline.
>
> > Unless you are replacing the kernel on a Linux/Unix machine, there's
> > really no need to reboot a system for something like this.
>
> On this machine only, 3.16.0 with PAE support (8Gb of dram) is the current
> favorite.  But that also means the only LCNC that runs is the sim's.
> Nothing in the machine metal hardware category present here, so thats
> adequate.
>
> > Mark
>
> Cheers, Gene Heskett
>


Now yer sounding like a Winders user...  ;-)

'service --status-all'

and 'ps -eaf'

Mark
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Re: [Emc-users] 7i76 and spindle control

[Gene Heskett]

On Friday 26 September 2014 10:24:09 John Alexander Stewart did opine
And Gene did reply:
> Andy, Gene - I do have a spare 12v linear regulated supply and a nice
> small 5v switching sitting by my new mill, was going to prototype with
> the 5v first. (KBIC says 0-7v input in voltage follower mode - 0-5v
> will get me going)
> 
> Interesting about the dc-dc converters; on reading, as Gene says, some
> are isolated, some are not.
> 
> The local store does have lots of switching power supplies of varying
> voltages, and I do have a large metal box for all of this to go into,
> but I dislike clutter.

That is why you put the clutter in a swarf proof box. ;-)
 
And while I am at it, some of our servo controllers will, when slowing to 
stop or reverse, dump the motors energy back into the the psu, raising its 
output voltage significantly. Very few switchers are capable of dealing 
with that and will go into over voltage protection shutdowns. So anytime 
I'm not pure steppers, I use a simple transformer and cap supply, it 
doesn't "bither them a bot". :) The fact that it needs a 2 wheel hand cart 
to move it any great distance is beside the point.  What I finally wound 
up with here, to run a 1 HP rated escapee  from a treadmill, has a 2500va 
transformer and a need for a strong back to move it.  Parts cabbaged from 
an old Phase Linear dual 750 rms watts a channel amplifier, and caps from 
an IBM printer that was about the same size as a 17 cu ft chest freezer 
when it was alive.  The Phase Linears caps were only surge rated to about 
125 volts.  But I have 150 volts for a surge margin using 2 of the IBM 
caps with a 5k equalizer bleeder across each, wired in series.  I think I 
can weld stuff with it.  Evidence of that is a nice steel cookie socket in 
the side of a wrench that shorted them a day after it had been turned off 
before I added a 7 watt xmas tree lamp to the output for a bleedoff.  
Takes several minutes at that, big caps, 3" in diameter & 7.5" tall. 
19,000 uf IIRC.

> So, I'll see if the local store has a 12v 12v dc isolated  converter
> that is small and compact.
> 
> I appreciate the isolation warnings; while I do realize that I'm
> playing with 110v, 15A here, but it is nice to have the reminder, and
> also, for others who may stumble across this thread.
> 
> Thank you!  JohnS

NP John

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 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 10:42:15 John Dammeyer did opine
And Gene did reply:
> I've heard on the news that Wifi routers running an embedded linux also
> run bash and need an upgrade?  Is that true?
> John

I checked at the dd-wrt site half an hour ago, but BrainSlayer has not 
posted anything about it.  Most of that stuff is running a busybox 
variant, so its bash is even more stripped than dash is, and we have no 
info on its vulnerability yet. 

If this shellshock thing can take down dd-wrt, the whole planet is in 
seriously deep doo doo.  I am watching the traffic leds on my netgear with 
dd-wrt in it but do not see anything unusual, yet...

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 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Printing on wall

[Viesturs Lācis]

2014-09-26 17:58 GMT+03:00 Bari :
> You'll need more than just a logic analyzer. There is a high voltage
> analog waveform that drives the piezo actuator in each nozzle. The shape
> of the pulses control how the drops and satellites are formed and
> ejected from the nozzles. Piezo heads are more difficult to drive than
> thermal inkjet heads.


Thank you everybody for the ideas.
We decided to start at checking with oscilliscope, what is goint on in
the signal lines on the printer head, when it is working.

Viesturs

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 11:02:36 Mark Wendt did opine
And Gene did reply:
> On Fri, Sep 26, 2014 at 10:53 AM, Gene Heskett  
wrote:
> > On Friday 26 September 2014 09:11:41 Mark Wendt did opine
> > 
> > > A reboot is still not required.  Simply restart the services.  Or
> > > do a 'pkill -HUP '.
> > 
> > Chuckle, but then I would have to remember what services were in fact
> > running.  With my well aged wet ram, suffering from short term bit
> > rot, its easier to just click on restart and restore to the
> > baseline.
> > 
> > > Unless you are replacing the kernel on a Linux/Unix machine,
> > > there's really no need to reboot a system for something like this.
> > 
> > On this machine only, 3.16.0 with PAE support (8Gb of dram) is the
> > current favorite.  But that also means the only LCNC that runs is
> > the sim's. Nothing in the machine metal hardware category present
> > here, so thats adequate.
> > 
> > > Mark
> > 
> > Cheers, Gene Heskett
> 
> Now yer sounding like a Winders user...  ;-)

Now thats an assault on my supposedly good sense. ;-)
 
service --status-all |wc -l
44

ps -eaf|wc -l
265

Can you track that? I can't.

Time for me to find some jeans & put wagon load of dirt in a gas line 
ditch I think.

Unless Dee wants some lunch at Kathy's.  See rule #2. ;-)

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 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Mark Wendt]

On Fri, Sep 26, 2014 at 12:04 PM, Gene Heskett  wrote:

>
> >
> > Now yer sounding like a Winders user...  ;-)
>
> Now thats an assault on my supposedly good sense. ;-)
>
> service --status-all |wc -l
> 44
>
> ps -eaf|wc -l
> 265
>
> Can you track that? I can't.
>

Easy peasy.

service --status-all | less

ps -eaf | less

to exit, type "q"

I'll make a Unix/Linux sysadmin outta you yet.  ;-)


>
> Time for me to find some jeans & put wagon load of dirt in a gas line
> ditch I think.
>
> Unless Dee wants some lunch at Kathy's.  See rule #2. ;-)
>
> Cheers, Gene Heskett
>

Cheers indeed,
Mark
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Re: [Emc-users] 7i43 to control spindle speed

[Condit Alan]

On Sep 26, 2014, at 5:44 AM, andy pugh  wrote:

Andy,

Thanks, I will try my circuit because I already have had the PCB made and I 
have assembled it, however, yours is much simpler. I think I will try yours in 
the future.

Do you use a relay to reverse the spindle motor? With the appropriate hal 
connections (and possibly support circuitry) one could use the dir line to 
control a DPDT relay.

Alan

> From: andy pugh 
> Subject: Re: [Emc-users] 7i43 to control spindle speed
> Date: September 26, 2014 at 5:09:03 AM PDT
> To: "Enhanced Machine Controller (EMC)" 
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> On 22 September 2014 00:22, Condit Alan  wrote:
> 
>> I have seen recommendations about using a stepgen instead of a PWMgen. Which 
>> would be the better choice? Why?
> 
> The 7i43 on my 9x20 uses a PWMgen. (I think it might be in PDM mode in
> actuality). A stepgen is only appropriate if using
> frequency-to-voltage.
> 
> A suggested output circuit is:
> https://picasaweb.google.com/108164504656404380542/CNCUnsorted#6013253785596056210
> though I see you already have one.
> 
> -- 
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
> 
> 
> 
> 
> 
> From: Gene Heskett 
> Subject: [Emc-users] Another new bash update, the previous fix for 
> "shockwave" was incomplete
> Date: September 26, 2014 at 5:29:31 AM PDT
> To: "Enhanced Machine Controller (EMC)" 
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> See subject, for a change this hits ALL the non-windows systems.
> 
> So update your bash everywhere and reboot them ASAP.
> 
> 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 
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
> 
> 
> 
> 
> 
> From: andy pugh 
> Subject: Re: [Emc-users] Another new bash update, the previous fix for 
> "shockwave" was incomplete
> Date: September 26, 2014 at 5:35:16 AM PDT
> To: "Enhanced Machine Controller (EMC)" 
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> On 26 September 2014 13:29, Gene Heskett  wrote:
>> See subject, for a change this hits ALL the non-windows systems.
> 
> "Shellshock" seems like a better search term.
> 
> -- 
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
> 
> 
> 
> 
> 
> From: Gene Heskett 
> Subject: Re: [Emc-users] 7i76 and spindle control
> Date: September 26, 2014 at 5:42:54 AM PDT
> To: emc-users@lists.sourceforge.net
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> On Friday 26 September 2014 05:58:37 andy pugh did opine
> And Gene did reply:
>> On 26 September 2014 04:28, Peter C. Wallace  wrote:
>>> The 7I76 spindle analog out circuitry expects a regulated 5V to 12V
>>> supply, your supply has about 10K Ohms of series resistance so is
>>> not a suitable voltage source. You can use an isolated external
>>> supply of 5 to 12V
>> 
>> It might be important to stress "isolated" there. The KBIC controller
>> float the pot at +100 volts or so.
> 
> I'll add even more emphasis to this warning.  We tend to forget that which 
> Just Works(TM)
> 
>> One solution is probably a small 12V - 12V isolated DC-DC converter
>> connected to the normal 12V DC.
> 
> That is another avenue, and a actually a good suggestion as those are 
> generally less costly than a line transformer powered solution and 
> considerably smaller physically.
> 
> Since this circuit generally needs less than 20 milliamps, if no 12 volts 
> is available but 5 volts is, there are 5 to 12 converters available too.  
> But they MUST BE TRANSFORMER ISOLATED, the charge pump designs have way 
> too much leakage coupling due to the use of capacitance for the power 
> transfer method.  Leakage that can destroy circuitry if accidentally 
> grounded, and kill you if you are the grounding medium. :(
> 
> Good advice Andy, 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 
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
> 
> 
> 
> 
> 
> From: Mark Wendt 
> Subject: Re: [Emc-users] Another new bash update, the previous fix for 
> "shockwave" was incomplete
> Date: September 26, 2014 at 5:43:58 AM PDT
> To: "Enhanced Machine Controller (EMC)" 
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> On Fri, Sep 26, 2014 at 8:29 AM, Gene Heskett  wrote:
> 
>> See subject, for a change this hits ALL the non-windows systems.
>> 
>> So update your bash everywhere and reboot them ASAP.
>> 
>> Cheers, Gene Heskett
>> 
> 
> 
> Yup.  But no need to reboot the machine for the bash update.  All you need
> to do is type 'exec bash' on any command line terminals you have open or
> log out a

Re: [Emc-users] 7i43 to control spindle speed

[andy pugh]

On 26 September 2014 19:52, Condit Alan  wrote:

> Do you use a relay to reverse the spindle motor? With the appropriate hal
> connections (and possibly support circuitry) one could use the dir line to
> control a DPDT relay.

I actually have a little board with a couple of ULN2003 chips on it,
controlled by the 7i43, and use those to set "on" and "dir" for the
VFD. There is also a channel that swaps between the mill motor and
lathe motor, as the same VFD drives both on the dual-purpose machine.
(The board is actually plug-configurable to allow any GPIO pin to use
the input and output buffers. I have no idea why I bothered, I have
never changed the configuration.

I am not sure if your 7i42 has the "oomph" to drive a relay. The 7i37
might have been a better choice.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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Re: [Emc-users] using 7i43 as a stepper controller

[Condit Alan]

Thanks, Andy,

I wondered if my email had BO. It is interesting that they show up in the 
archives and in digests, but evidently get spam folder-ed for individual 
e-mails.

I can’t find them now. I get the user and dev digests as well as I read some of 
the forum stuff. I suspect that I saw something in the middle of a thread where 
someone was setting up a closed system and I missed the part about closed loop.

I don’t have encoders for my steppers (yet). So I will initially set up 
position mode.

Alan

On Sep 26, 2014, at 5:44 AM, andy pugh  wrote:

> From: andy pugh 
> Subject: Re: [Emc-users] using 7i43 as a stepper controller
> Date: September 26, 2014 at 5:03:54 AM PDT
> To: "Enhanced Machine Controller (EMC)" 
> Reply-To: "Enhanced Machine Controller \(EMC\)" 
> 
> 
> 
> On 22 September 2014 00:13, Condit Alan  wrote:
> 
>> I have seen some recommendations talking about setting up the stepgens for 
>> the 7i43 for velocity mode. Does this require encoders on the steppers?
> 
> I just found this message in the spam folder (in fact, all your
> messages go there, because of Yahoo).
> Typically you would use velocity-mode when the steppers are part of a
> closed-loop system. It would work with encoders on the steppers, and
> possibly even better when combined with linear scales.
> 
> There may be other applications, what were the links where you saw it 
> suggested?
> 
> -- 
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
> 

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Re: [Emc-users] Another new bash update, the previous fix for "shockwave" was incomplete

[Gene Heskett]

On Friday 26 September 2014 12:23:51 Mark Wendt did opine
And Gene did reply:
> On Fri, Sep 26, 2014 at 12:04 PM, Gene Heskett  
wrote:
> > > Now yer sounding like a Winders user...  ;-)
> > 
> > Now thats an assault on my supposedly good sense. ;-)
> > 
> > service --status-all |wc -l
> > 44
> > 
> > ps -eaf|wc -l
> > 265
> > 
> > Can you track that? I can't.
> 
> Easy peasy.
> 
> service --status-all | less
> 
> ps -eaf | less
> 
> to exit, type "q"
> 
> I'll make a Unix/Linux sysadmin outta you yet.  ;-)

Ya think?  Heck, if that is how I'd have to do it, rather than less, which 
of course I did do at the time, I'd pipe it to | lp -dBROTHEHL2140 -, and 
get some exercise running to the basement to get it off that printer so I 
could go down the list putting a checkmark beside each process I 
restarted.

With my bum knee, going up & down those steps one at a time using the 
right knee for all the bending and climbing, I'll warrant I can reboot it 
quicker, and KNOW the job is done right.

The point being and that you seem to be missing is that every process that 
used bash would have to be shut down AT THE SAME TIME in order to purge 
the one copy of bash thats in memory, sharing a different stack pointer 
for each process its associated with.  So I'd doubt that just going down 
the list with a service xyz restart would ever pull a fresh copy of the 
just installed version into memory, not when there is what the system 
thinks is a perfectly good copy of bash already in memory, locked there by 
40+ other processes using it.

You aren't thinking like the os thinks when you assume a simple restart of 
each used process will reload a fresh copy of bash per process.  Simply 
put, tain't gonna happen.

I'd go so far as to say that no os on the planet loads a separate copy of 
bash on a per process basis. So reboot the sucker and KNOW its done.  

Multi-user, multitasking os's like Unix (1970's-?) or OS9 (1982-?), never 
did that simply because there was not enough very expensive memory in 
those ancient machines to even consider loading a private copy. I can 
recall paying $400 for an s100 board kit with 4k of static ram on it in 
1980?  

OS9 was my teacher about how a Unix like system worked and one of the 
reasons the M$ system has not been allowed to survive on the premises more 
than a week or 2 after I had bought the machine.  And that only once, when 
I needed a lappy for on the road use. But it had an early Mandrake on it 
buy the time it hit the road the first time.

This BTW is not the Mac pre-bsd OS-9, but the Microware version that first 
ran on a 64k, floppy based TRS-80 Color Computer.  I am very familiar with 
that os as I did major work in several pieces of it in converting it to 
run on a coco which had had its cpu replaced with the considerably more 
intelligent Hitachi HC6309, one of the best kept secrets in computers 
ever.  I also patched the Random Block File manager so that up to 4Gb hard 
drive partitions can be used, on a system that was all tapped out at 128 
megs for the whole drive in the original version.

Sysadmin? Yes & no. The devil is in the details, those I have to ask 
about, Mark, but the basic principles about how its done internally are 
not a puzzle, just the age creases in the faces (and blackhead locations) 
change according to the logo's on the box it came in.  And linux has most 
certainly caused a population explosion with its varieties, each of which 
has its own preferences for "wash soap & face creams" to make it look as 
good as it does on the outside, with, as we all know, wildly varying 
degrees of success in the pretty face dept.  Some of them have been Coyote 
Ugly over the last 16 years I've been using it. ;-)

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 
US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS

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