Re: [Emc-users] Looking for anyone with a Pico Systems Univ PWM card *and* a pci-e parport

[Maxime Lemonnier]

Thanks Jon,

My numbers would then be (for 1 univpwm card, previous numbers I gave were
for two dasy chained cards) :
write: 60us
read: 83us
s-tread: 145 (max 170)

So it means I could safely do 5KHz.

Thanks Jon!



On Mon, Mar 26, 2018 at 12:46 PM, Jon Elson  wrote:

> On 03/22/2018 10:19 PM, Maxime Lemonnier wrote:
>
>> Ha! What is the frequency of the P4 you gave numbers for, Jon?
>>
> Pentium 4, 2.00 GHz.  So, I guess all numbers I gave should be divided by
> 2 to turn them into ns.
>
>>
>> So, write would be 30 us (max 47)
> read was 64 (max 94)
> and 193 us for the total servo thread.
>
> Jon
>
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Looking for anyone with a Pico Systems Univ PWM card *and* a pci-e parport

[Jon Elson]

On 03/22/2018 10:19 PM, Maxime Lemonnier wrote:

Ha! What is the frequency of the P4 you gave numbers for, Jon?
Pentium 4, 2.00 GHz.  So, I guess all numbers I gave should 
be divided by 2 to turn them into ns.



So, write would be 30 us (max 47)
read was 64 (max 94)
and 193 us for the total servo thread.

Jon

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] USB wifi dongle

[Moses McKnight]

I thought I sent this a couple of days ago but it only went to Andy because I 
forgot this list does not set the Reply-to to the list address (annoying it is!)


The problem with Debian and wireless is that they don't include firmware for the 
wireless chipsets by default (non-free etc), so you have to install the firmware 
package for your chipset.


Here are a couple of sites with adapters that should work with about any linux 
distro, although debian may require firmware install for some of them.  I 
haven't tried any of these myself!  I did get a panda pau05 and it seems to work 
well in ubuntu 14.04, but I did not try in Debian.


https://www.thinkpenguin.com/catalog/wireless-networking-gnulinux
https://zsecurity.org/product/mini-atheros-ar9271-2-4-ghz-usb-wifi-wireless-adapter/
https://zsecurity.org/product/atheros-ar9271-2-4-ghz-usb-wifi-wireless-adapter/

On 03/22/2018 09:37 PM, andy pugh wrote:

On 23 March 2018 at 01:29, jeremy youngs  wrote:

Something like this ?


Yes, very similar.

But I would suggest waiting in the hope that somone knows of a Wifi
dongle that works :-)



--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] USB wifi dongle

[Kurt Jacobson]

May I once again mentioned the ThinkPenguin WiFi dongles as possible
candidates?
https://www.thinkpenguin.com/gnu-linux/penguin-wireless-g-usb-adapter

Based on the debian wiki the drivers for the Realtek RTL8187B chipset used
in the above
linked dongle are included in the Linux kernel, and should be automatically
loaded for supported devices.

Cheers,
Kurt



On Mon, Mar 26, 2018 at 4:48 AM, andy pugh  wrote:

> On 26 March 2018 at 02:56,   wrote:
> > I haven't been really listening to this thread but something Andy said
> about not authorizing..  could it be the issue I had a while back..?
> > http://forums.debian.net/viewtopic.php?f=10=131621=649030#p649030
>
> Worth a try, I guess. I am ending up with long device names
> incorporating the MAC address.
> (With the other ones, I get nothing at all with the TP-link)
>
> --
> 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
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] wiring. axis move?

[John Figie]

 On Sunday 25 March 2018 21:58:58 John Kasunich wrote:

> On Sun, Mar 25, 2018, at 8:29 PM, Gene Heskett wrote:
> > > On Sat, Mar 24, 2018, at 5:54 PM, a k wrote:
> > > > I measure supply 120 v ac.
> >
> > Thats another problem, the std line voltage has been 127 volts for
> > several decades. I would at least compare what this one reads
> > against a known good meter, because either your building wiring is
> > wonkie, or that meter belongs in the trashbin, thats about a 5%
> > error.
>
> I beg to differ on that.  127V is NOT the standard and has never been.
>"

On Sunday Mar 25 2018 at 10:16 PM (10 hours ago) Gene Heskett Wrote:

"It has been since the 70's John. I could probably find it in my copy of
the NEC, and its old, 1996 issue.  And then again, maybe not. The NEC
sets voltage classes, but is far more concerned with the currents. Some
time in the mid 1970's it had been 122 volts for a while, before that
117, and in nominally 1950 its was practice at 112 volts. Then circa
1980 it was raised to 127 and still is. That change wound up costing.."


NFPA-70 2011 (NEC) Article 100, Definitions, states the following: "
Voltage Nominal. A nominal value assigned to a circuit of system for the
purpose of conveniently designating its voltage class (e.g. 120/240 volts,
480Y?277 volts, 600 volts).The actual voltage at which a circuit operates
can vary from the nominal within a range tat permits satisfactory operation
of equipment.

Informational Note: See ANSI C84.1-2006 Voltage Ratings for Electric Power
Systems and Equipment (60Hz). " Unfortunately I do not have this ANSI
standard, but,

NFPA-70 220.5(A) Voltages: States: " Unless other voltages are specified,
for purposes of calculating branch-circuit and feeder loads, nominal system
voltages of 120, 120/240, 208Y/120, 240, 347, 480Y/277. 480, 600Y/347, and
600 volts shall be used."

In addition, during my 40+ years of electrical engineering and we have
always designed and tested (including for UL approvals) for nominal line
voltages of 120V. Typically equipment is designed to operate at 120V
+10/-15%

The line voltage in my shop fed from a pole transformer supplying only my
residence and shop measured 122.5 Volts today at 7:30 am with naarly no
load applied. - Milwaukee WI.

Respectfully,

John Figie


>
> --
> 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
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] wiring. axis move?

[Roland Jollivet]

I still think it's ground related.

Are these DC motors?

If they run outside the box ok, then the frame of the motor is relevant.

If they are DC, then carbon dust inside the motor could be conducting to
the grounded? case, causing problems.




On 26 March 2018 at 04:11, a k  wrote:

> Hi
> I did check wiring.
> It was same as when machine work  last time 8 month ago.
> I did remove all 3 motor drive from inside aluminum box and mount them on
> outside wall of same aluminum .
> Result.
> All axis working good.  No uncontrollable motion of axis.
>
> Maybe problem is that drive generate magnetic field that like induction
> create current on metallic box?
> I am using linze motor drive. I have them from 2004.
> Besides that they do not like to be inside metal box no problem for 14
> years.
>
> I will make box from plywood . And see result.
>
>
>
>
>
>
>
>
>
>
>
> On Mar 25, 2018 5:29 PM, "Gene Heskett"  wrote:
>
> On Sunday 25 March 2018 15:02:45 John Kasunich wrote:
>
> > On Sat, Mar 24, 2018, at 5:54 PM, a k wrote:
> > > I use small tester.
>
> Which does not tell us a thing about what it can measure, please relate
> the make and model as some of us might recognize it.
>
> > > I measure supply 120 v ac.
>
> Thats another problem, the std line voltage has been 127 volts for
> several decades. I would at least compare what this one reads against a
> known good meter, because either your building wiring is wonkie, or that
> meter belongs in the trashbin, thats about a 5% error.
>
> > > Meter works.
>
> I won't give it credit for being accurate.
>
> > > Axis was moving by them self.
> >
> > THIS:
> > > Touch box with real ground and breaker turn off.
> >
> > Means you have something screwed up.
> >
> > STOP and figure out what it is before you kill yourself or someone
> > else.
>
> I'll second this. You have a serious, potentially lethal problem. Please
> get someone in there who can find and fix it. We aren't interested in
> reading about you in the obit columns of the local papers.
>
> > > Between box and real ground tester read 30 v ac
> >
> > Maybe that means your wiring error is on the secondary side of your
> > power supply transformer.
>
>
>
> --
> 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
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] wiring. axis move?

[andy pugh]

On 26 March 2018 at 05:29, Chris Albertson  wrote:

> At some point where the power comes into your building the
> grounded wire and the cold water pipe should be connected together.
> Also at the same location where should be a ground rod or a connection
> to metal that was embedded in a concrete foundation for this purpose.

Not always. I would say it is probably not a good idea to install such
a link if it is missing.
There are various standards for the connection of the ground wire (and
for the source of the neutral, sometimes that is explicitly linked to
Gnd inside the property)
https://en.wikipedia.org/wiki/Earthing_system#IEC_terminology
There are at least 5 ways to do it, TN-S, TN-C, TN-C-S, TT and IT.

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] wiring. axis move?

[Gene Heskett]

On Monday 26 March 2018 00:29:24 Chris Albertson wrote:

> On Fri, Mar 23, 2018 at 4:24 PM, a k  wrote:
> > I am in portland .
> > 30 to 40 v ac I read between water pipe _ which is real ground and
> > ground on the outlet pin that has cylindrical shape.
> > Is this normal?
>
> No.  Something is seriously wrong to the point off being dangerously
> wrong.  At some point where the power comes into your building the
> grounded wire and the cold water pipe should be connected together.
> Also at the same location where should be a ground rod or a connection
> to metal that was embedded in a concrete foundation for this purpose.

Here, when I replaced my service with a 200amp, making the house a 60 amp 
subcircuit, in 2007, getting ready to build on a garage, I had to drill 
thru the concrete, and place 2, 8' ground rods, 8 feet apart, in the 
holes both tied to the neutral and to the static. Up till then I lost a 
modem or something everytime the can pole across the street got hit. I 
have not lost a thing since. The 50kw can itself has been blown, but 
I've not been hurt. I'd call that a plus.
>
> 30 volts means something is broken.
>
> In the US we have a neutral conductor.   It is the longer of the two
> slot-shape holes in the outlet.   This pin is allowed to be a few
> volts above ground but only a few.
>
> You don't say but you might be in an outbuilding like a detached
> garage.   Some times these are written up by a "do it yourself" type
> home owner who does not wrong.   There are a million ways it might be
> broken, lose conations, incompetent installation, water filling a a
> buried conduit (yes I've seen this, completely flooded)  Or the most
> likely two cases:
> 1) You house was built before a ground outlet was required and there
> are no ground wires.   That three-prong outlet was install later and
> the ground pin is not even hooked up.
> 2)  Some one used metal conduit for the ground.  This used to be
> allowed.  Then some section of the conduit became rusted and you are
> back to #1 above.
>
> You might take the outlet off and look to see if there is even a green
> or bare wire.
>
> But with 30 volts to the cold water line, it is take for a electrician
> to look.
>
>
>
>
> I would walk this problem backwards to the course.  Or all the outlets
> like this?
>
> > On Mar 23, 2018 4:03 PM, "Chris Albertson"
> > 
> >
> > wrote:
> >> Aram,
> >>
> >> Where to you live?  In North America, UK, ?
> >>
> >> Building wiring conventions are different in different places. but
> >> in general your system, taken as a whole needs to be connected to
> >> exactly ONE ground reference.  No more no less.  The best way to
> >> place a bolt some place and define that is "The Ground"
> >>
> >> If you have 30+ volts AC on a ground pin  on an outlet you have a
> >> problem that needs to be looked at by a good electrician.   It
> >> should never be that high.   Some cases are thinks like corosion
> >> and loose connections.   One cause I that think of is that in some
> >> older buildings they were allowed to use metal conduit as the
> >> ground connection.  Works OK at first but meta conduit rusts ofter
> >> time.  Now day we are required to pull a group cable
> >>
> >> On Fri, Mar 23, 2018 at 2:04 PM, a k  wrote:
> >> > hi
> >> > i reassemble my lcnc mill, and i found that axis move by them
> >> > self. i think it is something to do with static electricity.
> >> > i found ground - and when grounded lcnc body of machine - breaker
> >> > turn
> >>
> >> off.
> >>
> >> > i measure with dc voltage between machine and ground 2. vdc and
> >> > when i measure ac voltage between lcnc machine and ground it was
> >> > 35 v AC.
> >> >
> >> > i know that when use real ground like a water pipe and ground in
> >> > outlet there always will be current they always be 30 v ac.
> >> > can it cause problem?
> >> >
> >> > thanks
> >> > aram
> >> > 
> >> > --
> >> > Check out the vibrant tech community on one of the world's most
> >> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> >> > ___
> >> > Emc-users mailing list
> >> > Emc-users@lists.sourceforge.net
> >> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >> --
> >>
> >> Chris Albertson
> >> Redondo Beach, California
> >> 
> >> --
> >> Check out the vibrant tech community on one of the world's most
> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> >> ___
> >> Emc-users mailing list
> >> Emc-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > 
> >-- Check out the vibrant tech community on one of the world's

Re: [Emc-users] USB wifi dongle

[andy pugh]

On 26 March 2018 at 02:56,   wrote:
> I haven't been really listening to this thread but something Andy said about 
> not authorizing..  could it be the issue I had a while back..?
> http://forums.debian.net/viewtopic.php?f=10=131621=649030#p649030

Worth a try, I guess. I am ending up with long device names
incorporating the MAC address.
(With the other ones, I get nothing at all with the TP-link)

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] USB wifi dongle

[jeremy youngs]

> On Mon, 26 Mar 2018 01:59:21 +0100
>  andy pugh  wrote:
> >
> > How is it going? I just bought a TP-Link TL-WN722N on the basis if
> > this thread and it doesn't work.
> > To the extent that it doesn't even say what it is in lsusb.
> >
> > Apparently the TP-Link TL-WN722N used to use an Atheros chipset, and
> > that works fine with Linux.
> > But they now use a Realtek one, and it doesn't.
> >
> > Furthermore I don't see any forum postings reporting success compiling
> > the drivers supplied in the CD.
>
>
> Well Andy I became incredibly busy and haven't yet ordered one. Your
> response makes me think that is likely a good thing. As I live exactly 200
> miles from no where I have to order from eBay for anything more technical
> than a bologna sandwich . I am appreciative of all the commentary on this
> thread however.
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users