Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Gene Heskett]

On Friday 05 February 2016 08:15:32 Dr. Nikolaus Klepp wrote:

> Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> > After an update session, x (twm) was restarted on the GO704 mill
> > install.
> >
> > Now Rainers python script will not run, BACKGROUND undefined, and
> > presumably, following normal proceedure if I get that fixed, the
> > FOREGROUND will be used as the next excuse to exit the script.
> >
> > Fail msg:
> >
> > gene@GO704:~/linuxcnc$ python
> > python_opencv_camera_example_with_gui.py Traceback (most recent call
> > last):
> >   File "python_opencv_camera_example_with_gui.py", line 278, in
> >  main()
> >   File "python_opencv_camera_example_with_gui.py", line 222, in main
> > root = Tk()
> >   File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1712, in
> > __init__ self.tk = _tkinter.create(screenName, baseName, className,
> > interactive, wantobjects, useTk, sync, use)
> > _tkinter.TclError: unknown color name "BACKGROUND"
> >
> > What can I put in ~/.basrc or ~/.profile that will fix this till the
> > next install wipes it out?  I tried 'export BACKGROUND=0,0,0' (for
> > black) and while it shows in an env report, it has no effect.
> >
> > I know this was hashed at length, a year or more ago, but can't
> > recall what was done before.
> >
> > Thanks all.
> >
> > Cheers, Gene Heskett
>
> Hi Gene!
>
> It's still the old solution with "xrdb", same that works on TDE :-)
> This is (still) in my ~/.xsessionrc :
>
> # LINUXCNC
> (
> sleep 10
> xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# gray90#' -e
> 's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# White#' -e
> 's#[A-Z_]*LOWLIGHT# Black ) &
>
>
> Nik
I found that script, as ~/.xinirc,
#!/bin/bash
sleep 10
# DEBUG
xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# 
gray90#' -e 's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# 
White#' -e 's#[A-Z_]*LOWLIGHT# Black#'|xrdb -merge
xmessage ".xinitrc :-)"

But it sleeps forever, needing a ctl-C to get my prompt back.  I just 
tried it again, 2 minutes later its still hung.  So I killed it again.

But thats running it from a konsole login from here.  I'll go out and 
reboot it just for S  I just woke up again, so that will take 5 or 
10.

Thanks Nik,

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] Odd SSR behaviour?

[Chris Albertson]

A few might fail.  If you were repairing TVs 20 years ago you only saw the
one in a million that failed.  I'd guess a dozen of these NTC Thermistors
are in every house in the world and few people ever notice them.

OK, you like switches and timers.  If a circuit breaker is popping then my
guess is that you might be switching an inductive load.  Where does the
energy in the magnetic field (back EMF) go?  Is it finding a path through
the circuit breaker?   I've never tripped a breaker with a switched
circuit like that but I've have a problem with a switched inductive load
tripping GFCI protected circuits (All outdoor and garage circuits are GFCI.)

Look for common problems like your outlet is misfired and you are actually
switching the neutral or if this is 220 that you are using a couple pole
switch.

On Thu, Feb 4, 2016 at 10:25 AM, Gene Heskett  wrote:


> > http://www.ametherm.com/inrush-current/inrush-current-faq.html
>
> It is an attractive idea, Chris, but from my experience in servicing tv's
> etc with them included to serve as degauser drivers, the failure rate
> has been noticeably often.  They fail high R, get progressively hotter
> as the R rises, and can affect the life of nearby parts from that heat,
> or even cook the degausing circiutry, and thats a large enough item to
> be considered a fire hazard.  I have seen several that self destructed,
> leaving just the wires sticking up out of the circuit board with little
> balls of melted copper on the ends of the wires, or hanging on the
> terminal strips prior to PCB's taking over from discreet circuitry.
>
> I thought of it, and the memory came back of all the failures in crt
> based tv's and monitors, so it was discarded. I have enough fire hazards
> on my premises as is.
>
> Thanks for the idea though as it gave me a reason to explain why I didn't
> do that.  Or, did I chase electrons for a living for too many years?
> Over 65 now. :(
>
> > On Wed, Feb 3, 2016 at 11:46 PM, Gene Heskett 
> wrote:
> > > On Wednesday 03 February 2016 21:38:27 Jon Elson wrote:
> > > > On 02/03/2016 02:09 PM, Gene Heskett wrote:
> > > > > Now I have spent 20 minutes doing a slow dance on those 2
> > > > > buttons, and haven't tripped the breaker yet, probably
> > > > > more than 50 full cycles.
> > > >
> > > > Well, still don't exactly know why it wasn't working
> > > > before.  Did these charge pumps DIRECTLY drive the SSRs?  I
> > > > can easily see how marginal or decaying analog outputs from
> > > > a charge pump could do unwanted things to an SSR, like make
> > > > it conduct ONLY on one polarity for a couple cycles as the
> > > > charge pump cap was draining.  In fact, if you give typical
> > > > SSRs marginal input voltages, I'll bet most of them will do
> > > > this.
> > > >
> > > > Jon
> > >
> > > You could have hit it squarely there, Jon.  Perhaps the
> > > mosfet/hexfet output might have been replaced with a comparator with
> > > a bit of a schmidt trigger hysteresis so that the output wasn't ever
> > > in that grey area. I'd be a bit spooked about running it all on a
> > > normal logic voltage supply though.  I did note that I had quoted
> > > the wrong voltage yesterday, coming out of the buck switcher, its
> > > display says 25.6 volts, not 12. But since the original 4000 family
> > > of cmos logic can and has survived on 28 volts on my watch with only
> > > nominal heating while being switched at 1/4 microseconds speed, I'm
> > > sure it could survive a nearly dc mode.  RCA only rated it for 15
> > > volts in their propaganda.
> > >
> > > There is such a circuit I've seen someplace that used 1 gate of a
> > > 4050 inverting buffer, with it driving the other 5 gates in the
> > > package so the end result is non-inverting, and that can easily
> > > supply 50 mills of output, and ack the SSR data we need 4 mills.
> > >
> > > One could adjust the trip point, since it would be at nominally 50%
> > > of VCC, simply by adjusting the supply VCC, so if the bucker was
> > > turned down to about 7.5 volts, the on/off response would
> > > essentially duplicate the nominally 3.75 volts on point of the
> > > hexfet.
> > >
> > > Hind sight, 20-05, I never thought of that when I laid it out in
> > > pcb. :( Perhaps I should?  That would make the board wider, or
> > > longer, but its nominally .9 by 1.75" now. Where I have them
> > > mounted, width could go up an inch w/o impinging on the rest of the
> > > stuff in that box.
> > >
> > > With that amount of gain in the buffering, I doubt if any schmidt
> > > triggering hysteresis would be needed to get a clean switch. About a
> > > .05 u-f feedback capacitor from the output back to cF to speed it up
> > > would be a great plenty I'd think.
> > >
> > > Food for thought and experimentaton when I am next bored.  But its
> > > working with the big current limiting resistor now, and its only
> > > heating 2 or 3 degrees per on/off cycle to do it, so my natural
> > > tendency 

Re: [Emc-users] Rewire Question?

[Gene Heskett]

On Friday 05 February 2016 23:22:35 Dave Cole wrote:

> I'm familiar with Hill Billy engineering..
>
> Be careful when taking single phase off 3 phase.   Phase to neutral is
> what you want of course, but if you somehow make a wiring mistake (or
> they did in the past), you can easily get line to line voltage in a
> place you don't want it to be.The result can be large amounts of
> smoke and some fire!  Don't ask how I know this...  :-/
>
> Dave

In my old home stomping grounds of central Iowa, we called that Shade 
Tree Mechanicing.  6 of one, half a dozen of the other. :)

But in splitting off a 3 phase circuit, I'd sure want to be assured it 
wasn't setup by the power folks as a "wild leg" circuit that was popular 
65 years ago. The only fix for that, that is IMO correct, is a delta 
primary, 1/1 ratio but wye secondary isolation transformer of suitable 
kilowatt rating.  And just to be a jerk about it, I'd sue to put it in 
front of the electrical metering, making the power company absorb the 3 
to 5% loses in such a setup.

> On 2/5/2016 11:09 PM, Todd Zuercher wrote:
> > This is the last of our old grandfathered in hill billy engineer
> > machines that I have to bring into the modern era.  Adding an e-stop
> > system is in the plan as well.  I am still amazed that the
> > electrical contractor who installed the machine when we moved to the
> > new shop in 2008 agreed to put it in this way.
> >
> > My plan was to put in a new panel with a disconnect and feed it with
> > a 40amp 3-phase breaker from the main panel.  Then from the
> > disconnect split it off into 9 single phase breakers.  There already
> > are contactors and such in the control system, adding the e-stop
> > loop will be very easy.

Sounds like an interesting machine.  I know where there is an 8 spindle 
machine, at a split rail fenceing maker, but I believe that one has just 
2 motors, one for each 4 spindles.  It does the rail holes in the  
fenceposts, doing the 3 holes each in a 3 rail fencepost, in 8 posts at 
once in about 2 minutes, not counting the load/unload time.

By brute force, I don't think the tooling has been sharpened in a decade.  
So the holes are ragged & splintery, but its still (shrug) a usable 
hole.  Probably have 20 such posts wrapped around my place.  But the 
original installer spaced them about 2 feet closer together than std, so 
when I have to replace a rotted rail, I have to saw off a couple feet of 
one of those rails, and get out my electric hand plane to put a new 
taper on the end of the rail.

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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[Emc-users] Rewire Question?

[Todd Zuercher]

We have an old machine that through the years has become an ungainly ball of 
wires. Currently with OSHA regs and all lockout tagout is a real pain as it is 
on this machine. 

It is a gang router (didn't start out as one), and is connected to 9 different 
single phase 110v breakers. One for each of the six 15amp routers plus 3 more 
for the control, and motion. (that stuff totals at most another 15amps.) 

Any suggestions for slimming this down so it could run off one set of wires 
with a single disconnect at the machine? 

-- 

 

Todd Zuercher 
mailto:zuerc...@embarqmail.com 

 
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Re: [Emc-users] Rewire Question?

[andy pugh]

On 5 February 2016 at 22:22, Todd  Zuercher
 wrote:

> It is a gang router (didn't start out as one), and is connected to 9 
> different single phase 110v breakers. One for each of the six 15amp routers 
> plus 3 more for the control, and motion. (that stuff totals at most another 
> 15amps.)

I am not familiar with your local regs. I am not even qualified to
wire to my own local regs but:

One machine should have one power cord. The upstream breaker should be
sized for that power cord (or, conversely, that power cord should
match the breaker).
If for no other reason than to make it very clear that the machine is
off before working on it.

Then, internal to the machine, you should have power distribution and
thermal/overload trips for each spindle.

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

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Re: [Emc-users] Rewire Question?

[Moses McKnight]

This may sound simplistic, but mount a control box on the machine with and main 
disconnect and breakers in it, and just one set of larger wires out to the main 
power box.  The control box could even just be a breaker box.

On 02/05/2016 04:22 PM, Todd  Zuercher wrote:
> We have an old machine that through the years has become an ungainly ball of 
> wires. Currently with OSHA regs and all lockout tagout is a real pain as it 
> is on this machine.
>
> It is a gang router (didn't start out as one), and is connected to 9 
> different single phase 110v breakers. One for each of the six 15amp routers 
> plus 3 more for the control, and motion. (that stuff totals at most another 
> 15amps.)
>
> Any suggestions for slimming this down so it could run off one set of wires 
> with a single disconnect at the machine?
>

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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Fox Mulder]

Am 05.02.2016 um 17:42 schrieb Gene Heskett:
> On Friday 05 February 2016 08:15:32 Dr. Nikolaus Klepp wrote:
> 
>> Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> Then opencv has a what looks like an input buffer size problem. two 
> screen snapshots attached to show that.  The camera only has 2 output 
> modes according to an lsusb -vv, a jpg in 640x480, which works well, but 
> is about half resolution.  Switching to  1280x1024, its native raw video 
> format, and while the tcl/tk window is the correct size, about 300 lines 
> of the bottom of the pix are dropped. I /think/ the target crosshairs 
> and circle are still correct, in which case I get the impression a few 
> pixels are missing on the right.  But since the horizontal scale is 
> missing I can't be sure.

One thing i see in your attached screenshot is that the video area in
the tk window has not the correct resolution. In my code the resolution
was set to 1280x960 for the video. In your screenshot the area for the
video is still 1280x960 and not 1280x1024. This leads to the question if
all occurrences for the resolution were changed correctly in the python
code.

The second problem with the missing lower part of the video is a bit
strange. The video in your screenshot has a resolution of 1280x720
(16:9). Could it be that your camera maybe is in widescreen format and
1280x720 is the native resolution?

This could explain why the grid is cropped at the lower end because the
program thinks the resolution is 1280x1024 when it in reality is
1280x720. The calculation for the position of the grid would then be
starting below the video frame. But this is only a wild guess.

What native resolution does other programs show for your camera like vlc
or guvc-view?

Ciao,
 Rainer

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Re: [Emc-users] Odd SSR behaviour?

[Gene Heskett]

On Friday 05 February 2016 11:52:00 Chris Albertson wrote:

> A few might fail.  If you were repairing TVs 20 years ago you only saw
> the one in a million that failed.  I'd guess a dozen of these NTC
> Thermistors are in every house in the world and few people ever notice
> them.
>
> OK, you like switches and timers.  If a circuit breaker is popping
> then my guess is that you might be switching an inductive load.  Where
> does the energy in the magnetic field (back EMF) go?  Is it finding a
> path through the circuit breaker?   I've never tripped a breaker
> with a switched circuit like that but I've have a problem with a
> switched inductive load tripping GFCI protected circuits (All outdoor
> and garage circuits are GFCI.)
>
> Look for common problems like your outlet is misfired and you are
> actually switching the neutral or if this is 220 that you are using a
> couple pole switch.

Actually, Chris, it was one of those names I'd love to see on the ballot, 
none of the above.

I solved it by renameing some stuff in my main hal file so it was easier 
for this old fart to follow the logic, as I had found the resistor and 
hard switches weren't timed correctly when I checked with a scope. Jon's 
idea that the slow decay of my charge-pump buckets may have been half 
cycling the power also entered into it I believe.

Anyway, after the renaming, I went down to that section of the hal file 
and tore out everything but the gpio setups for those two BoB pins, and 
reconfigured the whole thing to, when turning it on, a delay for the SSR 
feeding the resistor for .1 seconds. and 8 seconds later turning on the 
SSR feeding the toroids direct.

Then at off, I killed the direct feed in .1 seconds, and the resistors 
feed in 2 seconds (the response time of the detectors is about 1/3 
second to on, and about 3/4 second to off).  So now if it half cycles 
going off, the resistor is already back in circuit, controlling that dc 
surge to a bit over 2.4 amps and no problems.

The bottom line was that I had the SSR's in series before and now they 
are in parallel and the timing is now correct.  End of problem, the 
resistor (a 51 ohm 200 watter) controls the half cycle dc surge if it 
occurs.  In retrospect, I should have used a comparator/buffer so the 
SSR switching was instant, but this works.

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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[Emc-users] Inverter cards

[Nicklas Karlsson]

About half a year ago I was looking for inverter card but did not find any
general. I decided to make my own inverter card and a suitable control card.

Inverter card is really simple with four half bridges and hall current
sensors for two of the phases. Number of halfbridges is simple to chage if
needed. It is equipped with TO220 transistors.

Control card have a micro controller. Connectors without output for 3x2
halfbridges. Two encoder connectors. A number of analog inputs. An ethernet
connector and connectors for CAN/UART/SPI.


There a still a few bugs to remove and I intended to use them only for
myself but may consider sell cards if someone is interested?


Nicklas Karlsson
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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Gene Heskett]

On Friday 05 February 2016 11:01:06 Gene Heskett wrote:

> On Friday 05 February 2016 08:15:32 Dr. Nikolaus Klepp wrote:
> > Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> > > After an update session, x (twm) was restarted on the GO704 mill
> > > install.
> > >
> > > Now Rainers python script will not run, BACKGROUND undefined, and
> > > presumably, following normal proceedure if I get that fixed, the
> > > FOREGROUND will be used as the next excuse to exit the script.
> > >
> > > Fail msg:
> > >
> > > gene@GO704:~/linuxcnc$ python
> > > python_opencv_camera_example_with_gui.py Traceback (most recent
> > > call last):
> > >   File "python_opencv_camera_example_with_gui.py", line 278, in
> > >  main()
> > >   File "python_opencv_camera_example_with_gui.py", line 222, in
> > > main root = Tk()
> > >   File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1712, in
> > > __init__ self.tk = _tkinter.create(screenName, baseName,
> > > className, interactive, wantobjects, useTk, sync, use)
> > > _tkinter.TclError: unknown color name "BACKGROUND"
> > >
> > > What can I put in ~/.basrc or ~/.profile that will fix this till
> > > the next install wipes it out?  I tried 'export BACKGROUND=0,0,0'
> > > (for black) and while it shows in an env report, it has no effect.
> > >
> > > I know this was hashed at length, a year or more ago, but can't
> > > recall what was done before.
> > >
> > > Thanks all.
> > >
> > > Cheers, Gene Heskett
> >
> > Hi Gene!
> >
> > It's still the old solution with "xrdb", same that works on TDE :-)
> > This is (still) in my ~/.xsessionrc :
> >
> > # LINUXCNC
> > (
> > sleep 10
> > xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# gray90#' -e
> > 's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# White#' -e
> > 's#[A-Z_]*LOWLIGHT# Black ) &
> >
> >
> > Nik
>
> I found that script, as ~/.xinirc,
> #!/bin/bash
> sleep 10
> # DEBUG
> xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND#
> gray90#' -e 's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT#
> White#' -e 's#[A-Z_]*LOWLIGHT# Black#'|xrdb -merge
> xmessage ".xinitrc :-)"
>
> But it sleeps forever, needing a ctl-C to get my prompt back.  I just
> tried it again, 2 minutes later its still hung.  So I killed it again.
>
> But thats running it from a konsole login from here.  I'll go out and
> reboot it just for S  I just woke up again, so that will take 5 or
> 10.
>
> Thanks Nik,
>
Ok, did that, played with that script, rebooting each time after I had 
edited it. This (finally, about 7 reboots later) finally does it. And it 
works either on local console or my remote ssh -Y login.

# LINUXCNC
#!/bin/bash
(
  sleep 10
# DEBUG
  xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# 
gray90#' -e 's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# 
White#' -e 's#[A-Z_]*LOWLIGHT# Black#'
)|xrdb -merge
###xmessage ".xinitrc :-)"

I put the () in, along with the comment in line one, blew away the 
shebang (I think), and had to restore the "|xrdb -merge" on the end, and 
now it appears to work both places.  It was the xmessage ".xinitrc :-)" 
that was hanging it forever, or until I clicked to close it, which I was 
doing.  Now I don't see it & the login is quite noticably faster.

My biggest problem in inserting that above, was I had to get another 
shell, and do an "ls -la /sshnet/GO704" to get a directory listing 
because kmail could not see the sshfs generated directories contents 
until I had done that.

I swear, some days it doesn't pay to gnaw thru the straps and get up in 
the mornings.  But I have hopes of its working for a while now.

Thanks for the reminder, Nik, appreciated.

BTW, ~/.xsessionrc is a link to ~/.xinitrc if that was muddying the 
issue. I wanted to cover all the bases. :-)

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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[Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Gene Heskett]

After an update session, x (twm) was restarted on the GO704 mill install.

Now Rainers python script will not run, BACKGROUND undefined, and 
presumably, following normal proceedure if I get that fixed, the 
FOREGROUND will be used as the next excuse to exit the script.

Fail msg:

gene@GO704:~/linuxcnc$ python python_opencv_camera_example_with_gui.py
Traceback (most recent call last):
  File "python_opencv_camera_example_with_gui.py", line 278, in 
main()
  File "python_opencv_camera_example_with_gui.py", line 222, in main
root = Tk()
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1712, in __init__
self.tk = _tkinter.create(screenName, baseName, className, 
interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: unknown color name "BACKGROUND"

What can I put in ~/.basrc or ~/.profile that will fix this till the next 
install wipes it out?  I tried 'export BACKGROUND=0,0,0' (for black) and 
while it shows in an env report, it has no effect.

I know this was hashed at length, a year or more ago, but can't recall 
what was done before.

Thanks all.

Cheers, Gene Heskett
-- 
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Genes Web page 

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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[dr . klepp]

Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> After an update session, x (twm) was restarted on the GO704 mill install.
> 
> Now Rainers python script will not run, BACKGROUND undefined, and 
> presumably, following normal proceedure if I get that fixed, the 
> FOREGROUND will be used as the next excuse to exit the script.
> 
> Fail msg:
> 
> gene@GO704:~/linuxcnc$ python python_opencv_camera_example_with_gui.py
> Traceback (most recent call last):
>   File "python_opencv_camera_example_with_gui.py", line 278, in 
> main()
>   File "python_opencv_camera_example_with_gui.py", line 222, in main
> root = Tk()
>   File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1712, in __init__
> self.tk = _tkinter.create(screenName, baseName, className, 
> interactive, wantobjects, useTk, sync, use)
> _tkinter.TclError: unknown color name "BACKGROUND"
> 
> What can I put in ~/.basrc or ~/.profile that will fix this till the next 
> install wipes it out?  I tried 'export BACKGROUND=0,0,0' (for black) and 
> while it shows in an env report, it has no effect.
> 
> I know this was hashed at length, a year or more ago, but can't recall 
> what was done before.
> 
> Thanks all.
> 
> Cheers, Gene Heskett

Hi Gene!

It's still the old solution with "xrdb", same that works on TDE :-)
This is (still) in my ~/.xsessionrc :

# LINUXCNC
(
sleep 10
xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# gray90#' -e 
's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# White#' -e 
's#[A-Z_]*LOWLIGHT# Black
) &


Nik



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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Dr. Nikolaus Klepp]

Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> After an update session, x (twm) was restarted on the GO704 mill install.
> 
> Now Rainers python script will not run, BACKGROUND undefined, and 
> presumably, following normal proceedure if I get that fixed, the 
> FOREGROUND will be used as the next excuse to exit the script.
> 
> Fail msg:
> 
> gene@GO704:~/linuxcnc$ python python_opencv_camera_example_with_gui.py
> Traceback (most recent call last):
>   File "python_opencv_camera_example_with_gui.py", line 278, in 
> main()
>   File "python_opencv_camera_example_with_gui.py", line 222, in main
> root = Tk()
>   File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1712, in __init__
> self.tk = _tkinter.create(screenName, baseName, className, 
> interactive, wantobjects, useTk, sync, use)
> _tkinter.TclError: unknown color name "BACKGROUND"
> 
> What can I put in ~/.basrc or ~/.profile that will fix this till the next 
> install wipes it out?  I tried 'export BACKGROUND=0,0,0' (for black) and 
> while it shows in an env report, it has no effect.
> 
> I know this was hashed at length, a year or more ago, but can't recall 
> what was done before.
> 
> Thanks all.
> 
> Cheers, Gene Heskett

Hi Gene!

It's still the old solution with "xrdb", same that works on TDE :-)
This is (still) in my ~/.xsessionrc :

# LINUXCNC
(
sleep 10
xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# gray90#' -e 
's#[A-Z_]*FOREGROUND# Black#'  -e 's#[A-Z_]*HIGHLIGHT# White#' -e 
's#[A-Z_]*LOWLIGHT# Black
) &


Nik



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Re: [Emc-users] Rewire Question?

[Dave Cole]

Todd,

If you have multiple single phase breakers feeding that machine, that is 
probably not your only issue when it comes to Osha.

You need a decent Estop system on the machine also which means at the 
least one or more Estop circuits and some contactors to drop out the 
power, or more appropriately, bring the machine to a speedy, yet safe 
stop.   Lock out - tag out is only one of Osha's "hot buttons".

You need a real control box or you need to adapt an existing control 
box.  You can add a disconnect switch to an existing panel easy enough, 
but you also need downstream breakers from the disconnect as well as 
contactors.

Dave



On 2/5/2016 5:22 PM, Todd Zuercher wrote:
> We have an old machine that through the years has become an ungainly ball of 
> wires. Currently with OSHA regs and all lockout tagout is a real pain as it 
> is on this machine.
>
> It is a gang router (didn't start out as one), and is connected to 9 
> different single phase 110v breakers. One for each of the six 15amp routers 
> plus 3 more for the control, and motion. (that stuff totals at most another 
> 15amps.)
>
> Any suggestions for slimming this down so it could run off one set of wires 
> with a single disconnect at the machine?
>

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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Jeff Epler]

it looks like this is kde-specific breakage.  You may find this
workaround from redhat's bugzilla to be helpful.
https://bugzilla.redhat.com/show_bug.cgi?id=1043686#c5

A workaround is to go to
  KDE System Settings -> Application Appearance -> Colors -> Options
and disable the checkbox for
  Apply colors to non-KDE4 applications
and logout and login again.

Jeff

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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Gene Heskett]

On Friday 05 February 2016 21:35:50 Jeff Epler wrote:

> it looks like this is kde-specific breakage.  You may find this
> workaround from redhat's bugzilla to be helpful.
> https://bugzilla.redhat.com/show_bug.cgi?id=1043686#c5
>
> A workaround is to go to
>   KDE System Settings -> Application Appearance -> Colors ->
> Options and disable the checkbox for
>   Apply colors to non-KDE4 applications
> and logout and login again.
>
> Jeff

A better fix seems to be from Nik:

cut here
# LINUXCNC
(
  sleep 10
  xrdb -all -query|sed -e 's#[A-Z_]*BACKGROUND# gray90#' \
  -e 's#[A-Z_]*FOREGROUND# Black#' \
  -e 's#[A-Z_]*HIGHLIGHT# White#' \
  -e 's#[A-Z_]*LOWLIGHT# Black#'|xrdb -merge
 ) &
cut- ^here and save as ~/.xinitrc and link to ~/.xsessionrc.
>
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Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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Genes Web page 

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Re: [Emc-users] Rewire Question?

[Jerry Scharf]

Todd,

I would get a larger box to hold much of the controls, then put a 12
location load center with 15 amp breakers in it. Then mount a single
disconnect box next to the control box and run a small piece of conduit
between them. One place to lock out, all the wiring is now centralized and
organized and you have all the correct protection. You even have some extra
space for future growth.

jerry


On Fri, Feb 5, 2016 at 2:22 PM, Todd Zuercher 
wrote:

> We have an old machine that through the years has become an ungainly ball
> of wires. Currently with OSHA regs and all lockout tagout is a real pain as
> it is on this machine.
>
> It is a gang router (didn't start out as one), and is connected to 9
> different single phase 110v breakers. One for each of the six 15amp routers
> plus 3 more for the control, and motion. (that stuff totals at most another
> 15amps.)
>
> Any suggestions for slimming this down so it could run off one set of
> wires with a single disconnect at the machine?
>
> --
>
> 
>
> Todd Zuercher
> mailto:zuerc...@embarqmail.com
>
> 
>
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>



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Re: [Emc-users] BTDT re BACKGROUND,FOREGROUND not defined.

[Gene Heskett]

On Friday 05 February 2016 13:30:54 Fox Mulder wrote:

> Am 05.02.2016 um 17:42 schrieb Gene Heskett:
> > On Friday 05 February 2016 08:15:32 Dr. Nikolaus Klepp wrote:
> >> Am Freitag, 5. Februar 2016 schrieb Gene Heskett:
> >
> > Then opencv has a what looks like an input buffer size problem. two
> > screen snapshots attached to show that.  The camera only has 2
> > output modes according to an lsusb -vv, a jpg in 640x480, which
> > works well, but is about half resolution.  Switching to  1280x1024,
> > its native raw video format, and while the tcl/tk window is the
> > correct size, about 300 lines of the bottom of the pix are dropped.
> > I /think/ the target crosshairs and circle are still correct, in
> > which case I get the impression a few pixels are missing on the
> > right.  But since the horizontal scale is missing I can't be sure.
>
> One thing i see in your attached screenshot is that the video area in
> the tk window has not the correct resolution. In my code the
> resolution was set to 1280x960 for the video. In your screenshot the
> area for the video is still 1280x960 and not 1280x1024. This leads to
> the question if all occurrences for the resolution were changed
> correctly in the python code.
>
Yes they were, I just rechecked, 2 places, once in the menu and once in 
the callback.

> The second problem with the missing lower part of the video is a bit
> strange. The video in your screenshot has a resolution of 1280x720
> (16:9). Could it be that your camera maybe is in widescreen format and
> 1280x720 is the native resolution?

I did another lsusb -vv|less and scanned thru the report, I I believe you 
are 101% correct, in the 1280x1024 stanza's is "still image not 
supported"

So just for grins, I changed the vertical in both places to 720, and its 
working quite nicely in 16x9 format.  It also has a 320x240 mode but I 
don't need that at all.  It also shows a 1600x1200, but again "still 
image not supported". In that event, I get the 1280x720 image with right 
and lower borders.

So this problem is solved, and I thank you very much.

Now all I have to do is make a solid, quickly demountable, mount for the 
camera so that I can slip it in to use it & park it on a coat hanger so 
it doesn't get wrecked by an errant clamp bolt.

But the 45 degree dovetail tools will not be here till about Tuesday at 
the earliest.

Then to demo that the old fart isn't the woodworker he thought he was, I 
tried to assmble the walls for some blanket chests I am making, using 
the first 2 side boards and the first 2 end boards that I had precut 
from some pretty poor, warping like crazy, mahogany I paid about a 
kilobuck for.  But the instant I took the saran wrap off it, it thought 
it was competing for first prize at the Pretzel Benders ball.  I had 
forgotten that one of the side boards had a wind in it of about 4" in 
its 45 inch length. And that after machining the ends, poorly because it 
wasn't even of a uniform thickness, I had marked the bad side "scrap, 
burn me" and put it on the top tier of the wood rack.

So, having promptly forgot about it, poor short term memory, guess which 
was the first board I pulled off the rack...  Yup.  So tomorrow I have 
22 2" #8 screws to pull, knock it out and put it over on the scrap rack 
& put a good board in its place.

Hopefully it will also come closer to shrinking the same amount and I 
won't have to drive those Green & Green joints together with 30 lbs of 
pipe clamps & a dead blow hammer.

One thing is for certain, I am never ever buying another toothpick from 
Hartland Milling.  This stuff has had more time to "season" in my garage 
than its had since it was sliced out of the waterlogged tree & shipped 
to me.

> This could explain why the grid is cropped at the lower end because
> the program thinks the resolution is 1280x1024 when it in reality is
> 1280x720. The calculation for the position of the grid would then be
> starting below the video frame. But this is only a wild guess.
>
> What native resolution does other programs show for your camera like
> vlc or guvc-view?

Neither is installed.  And cheese doesn't work with this camera for some 
reason I've not deduced.  Segfaults.

So, I think the rest of this is making the mount, calibrating the offset, 
and learning how to use the buttons I stole from camview to get all the 
dots connected.

Thanks again Rainer, with your considerable help I think I have 
it "whupped".  I think the only other feature I'd like is a crop 
function so I am only seeing the center 200x200 out of the 1280x720 
mode.  A poor mans telephoto lens IOW.

> Ciao,
>  Rainer
>
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Re: [Emc-users] Rewire Question?

[Todd Zuercher]

This is the last of our old grandfathered in hill billy engineer machines that 
I have to bring into the modern era.  Adding an e-stop system is in the plan as 
well.  I am still amazed that the electrical contractor who installed the 
machine when we moved to the new shop in 2008 agreed to put it in this way.

My plan was to put in a new panel with a disconnect and feed it with a 40amp 
3-phase breaker from the main panel.  Then from the disconnect split it off 
into 9 single phase breakers.  There already are contactors and such in the 
control system, adding the e-stop loop will be very easy.

- Original Message -
From: "Dave Cole" 
To: emc-users@lists.sourceforge.net
Sent: Friday, February 5, 2016 10:30:50 PM
Subject: Re: [Emc-users] Rewire Question?

Todd,

If you have multiple single phase breakers feeding that machine, that is 
probably not your only issue when it comes to Osha.

You need a decent Estop system on the machine also which means at the 
least one or more Estop circuits and some contactors to drop out the 
power, or more appropriately, bring the machine to a speedy, yet safe 
stop.   Lock out - tag out is only one of Osha's "hot buttons".

You need a real control box or you need to adapt an existing control 
box.  You can add a disconnect switch to an existing panel easy enough, 
but you also need downstream breakers from the disconnect as well as 
contactors.

Dave



On 2/5/2016 5:22 PM, Todd Zuercher wrote:
> We have an old machine that through the years has become an ungainly ball of 
> wires. Currently with OSHA regs and all lockout tagout is a real pain as it 
> is on this machine.
>
> It is a gang router (didn't start out as one), and is connected to 9 
> different single phase 110v breakers. One for each of the six 15amp routers 
> plus 3 more for the control, and motion. (that stuff totals at most another 
> 15amps.)
>
> Any suggestions for slimming this down so it could run off one set of wires 
> with a single disconnect at the machine?
>

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Re: [Emc-users] Rewire Question?

[Dave Cole]

I'm familiar with Hill Billy engineering..

Be careful when taking single phase off 3 phase.   Phase to neutral is 
what you want of course, but if you somehow make a wiring mistake (or 
they did in the past), you can easily get line to line voltage in a 
place you don't want it to be.The result can be large amounts of 
smoke and some fire!  Don't ask how I know this...  :-/

Dave

On 2/5/2016 11:09 PM, Todd Zuercher wrote:
> This is the last of our old grandfathered in hill billy engineer machines 
> that I have to bring into the modern era.  Adding an e-stop system is in the 
> plan as well.  I am still amazed that the electrical contractor who installed 
> the machine when we moved to the new shop in 2008 agreed to put it in this 
> way.
>
> My plan was to put in a new panel with a disconnect and feed it with a 40amp 
> 3-phase breaker from the main panel.  Then from the disconnect split it off 
> into 9 single phase breakers.  There already are contactors and such in the 
> control system, adding the e-stop loop will be very easy.
>
> - Original Message -
> From: "Dave Cole" 
> To: emc-users@lists.sourceforge.net
> Sent: Friday, February 5, 2016 10:30:50 PM
> Subject: Re: [Emc-users] Rewire Question?
>
> Todd,
>
> If you have multiple single phase breakers feeding that machine, that is
> probably not your only issue when it comes to Osha.
>
> You need a decent Estop system on the machine also which means at the
> least one or more Estop circuits and some contactors to drop out the
> power, or more appropriately, bring the machine to a speedy, yet safe
> stop.   Lock out - tag out is only one of Osha's "hot buttons".
>
> You need a real control box or you need to adapt an existing control
> box.  You can add a disconnect switch to an existing panel easy enough,
> but you also need downstream breakers from the disconnect as well as
> contactors.
>
> Dave
>
>
>
> On 2/5/2016 5:22 PM, Todd Zuercher wrote:
>> We have an old machine that through the years has become an ungainly ball of 
>> wires. Currently with OSHA regs and all lockout tagout is a real pain as it 
>> is on this machine.
>>
>> It is a gang router (didn't start out as one), and is connected to 9 
>> different single phase 110v breakers. One for each of the six 15amp routers 
>> plus 3 more for the control, and motion. (that stuff totals at most another 
>> 15amps.)
>>
>> Any suggestions for slimming this down so it could run off one set of wires 
>> with a single disconnect at the machine?
>>
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