On Wed, Apr 06, 2011 at 08:49:16PM +0100, andy pugh wrote:
And now the cap sizing.
If I say that I can put up with 10% ripple at max rated current (7.5A
for the motors) on a nominal 300V then I end up with
C = 7.5A X 10mS / 30V = 2500uF.
Eeek!
On Wed, Apr 06, 2011 at 09:22:59PM +0100, andy pugh wrote:
I have plenty of NTC surge limiters.
Andy, what sort of devices are you using? I started building a surge
limiter with MOSFETS. Those NTC things sound kinda useful.
I'm using toroidal transformers, and they can give a big thump on
On 7 April 2011 10:26, Erik Christiansen dva...@internode.on.net wrote:
Andy, what sort of devices are you using?
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=5167827
--
atp
Torque wrenches are for the obedience of fools and the guidance of wise men
They work very well. It pays to get ones that are rated at quite a bit
above your load current otherwise they do have a tendency to pop.
Actually a simple resistor in series with the mains works pretty well.
Just make sure it is a wire wound resistor that can take high surge
currents.
Les
Oops, this didn't make it to the list, apparently because Andy had
mailed both to the list and to me. My mail system detects duplicates,
and keeps only the first. Unfortunately that was the non-list duplicate.
Replying to that didn't go to the list.
I'll have to build better defences against
On Thursday, April 07, 2011 08:01:09 AM andy pugh did opine:
On 7 April 2011 10:26, Erik Christiansen dva...@internode.on.net wrote:
Andy, what sort of devices are you using?
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getPro
ductR=5167827
One thing is missing here,
On Thursday, April 07, 2011 08:06:47 AM Erik Christiansen did opine:
Oops, this didn't make it to the list, apparently because Andy had
mailed both to the list and to me. My mail system detects duplicates,
and keeps only the first. Unfortunately that was the non-list duplicate.
Replying to
On Thu, Apr 07, 2011 at 08:10:55AM -0400, gene heskett wrote:
An additional thought comes to mind when using them for something like my
A3877 based xylotex setup, an extended time at low voltage is not
recommended as it causes more heat in the A3977's than the normal voltage,
so its
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
ian
Actually a simple resistor in series with the mains works pretty well.
Just make sure it is a wire wound resistor that can take high surge
currents.
Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
I think you've got it backwards.
The idea is to use a light bulb as a bleed resistor, and coincidentally
as a dangerous voltages present indicator :)
Light
On Thu, Apr 07, 2011 at 02:03:41PM +0100, Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
It has a large positive temperature coefficient, so admits a large
initial surge, then limits the current to a much lower
Ok, wrong again...;-} I have seen them used as short circuit
protection which fits in with what you say.
ian
On 07/04/2011 14:11, Stephen Wille Padnos wrote:
Ian W. Wright wrote:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
I
It's in a repo at: http://git.linuxcnc.org
--
Sebastian Kuzminsky
- Reply message -
From: John Murphy j...@wyosip.com
Date: Wed, Apr 6, 2011 22:39
Subject: [Emc-users] HostMot2 FPGA source?
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
I'm getting ready to
On Thursday, April 07, 2011 10:27:37 AM Erik Christiansen did opine:
On Thu, Apr 07, 2011 at 08:10:55AM -0400, gene heskett wrote:
An additional thought comes to mind when using them for something like
my A3877 based xylotex setup, an extended time at low voltage is not
recommended as it
On Thursday, April 07, 2011 10:33:33 AM Ian W. Wright did opine:
What about the old idea of putting a light bulb in series
with the mains? Would this have a useful effect?
ian
If sized right, somewhat useful, but nothing like the NTC goodie. Sizing
it right can be a problem when dealing
On Wed, 6 Apr 2011, John Murphy wrote:
Date: Wed, 6 Apr 2011 22:39:33 -0600
From: John Murphy j...@wyosip.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] HostMot2
Hi,
I am an EMC2 user and currently I am doing some pieces which take
several hours to mill.
So, I would like to run my CNC while I am not at home (eg while I am
at work), but still want to take an eye on my CNC through an IP camera
+ *get the possibility to remote control the AXIS GUI* (this is
I use a remote IP camera.
Screenshot of it is here:
http://igor.chudov.com/tmp/Netcam.png
http://igor.chudov.com/tmp/Netcam.pngComments below:
On Thu, Apr 7, 2011 at 11:53 AM, Rando Sauvage rando.sauv...@gmail.comwrote:
I am an EMC2 user and currently I am doing some pieces which take
On 7 April 2011 17:53, Rando Sauvage rando.sauv...@gmail.com wrote:
So, I would like to run my CNC while I am not at home (eg while I am
at work), but still want to take an eye on my CNC through an IP camera
+ *get the possibility to remote control the AXIS GUI* (this is the
important part
Rando Sauvage wrote:
Hi,
I am an EMC2 user and currently I am doing some pieces which take
several hours to mill.
So, I would like to run my CNC while I am not at home (eg while I am
at work), but still want to take an eye on my CNC through an IP camera
+ *get the possibility to remote
AFAIK Lexan is specifically designed for tough impact conditions, like a
window on a machining centre, so no, it wont shatter.
Roland
On 6 April 2011 17:19, Igor Chudov ichu...@gmail.com wrote:
I did an experiment. I took a 1/4 thick piece of junk Lexan, and beat it
with a steel bar. The
On Thu, 2011-04-07 at 18:53 +0200, Rando Sauvage wrote:
... snip
So, I would like to run my CNC while I am not at home (eg while I am
at work), but still want to take an eye on my CNC through an IP camera
+ *get the possibility to remote control the AXIS GUI* (this is the
important part ;-))
On Thu, 2011-04-07 at 10:54 -0700, Kirk Wallace wrote:
... snip
In case it might help, here is a link to some remote control and
multi-interface information:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Running_Multiple_User_Interfaces
This page really needs to be updated, but might provide
Once people start getting rid of their old android phones, you'll be able to
pick up used ones pretty cheap. I don't know if the G1 supports wifi, but I
think just about every android device after that does.
Of course, the screen isn't all that big - but being able to put it in your
pocket is a
On 4/6/2011 9:00 AM, Kent A. Reed wrote:
...
I'm getting too old to want to play this game but doesn't it seem there
is another alternative? Namely, insert another script to grub.d, call it
05_rtai, say, that adds the isocpus parameter just to rtai entries. If
10_linux results in the same
Yes, the G1 supports wifi, 802.11b.
On Thu, Apr 7, 2011 at 8:41 PM, Mark mpic...@gmail.com wrote:
Once people start getting rid of their old android phones, you'll be able to
pick up used ones pretty cheap. I don't know if the G1 supports wifi, but I
think just about every android device
On Apr 7, 2011, at 11:44 PM, Kent A. Reed wrote:
Now that I know how easy it is, I may try a second approach, just
modifying 10_linux so that it differentiates between rtai- and non-rtai
linux kernels. [Although I'm not sure that's the answer for me because I
like being able to boot the
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