On 12/13/2012 02:29 PM, Viesturs Lācis wrote:
> But my initial question was about documentation so that I could give
> the guy something to read and then he would ask me questions rather
> than I try to figure out, what is the best way to start explaining
> things.
I was surprised that most "babelf
On 12/14/2012 03:12 AM, Gene Heskett wrote:
> And I screwed that royally, its 185mv/A, not .185mv. Way too late. Or too
> early...
That's ok, it's late here, and I misread .185mV to be 185mV! 8-)
--
LogMeIn Rescue: Anyw
Jon Elson wrote:
> Viesturs Lācis wrote:
>
>> The small problem here is that putting encoder on ballscrew is just a
>> waste of encoder as the nut is rotating and the screw is fixed :))
>>
>>
> Oh, yes, in this case, the encoder would need to either be on the motor, or
> driven by a sepa
On Fri, Dec 14, 2012 at 8:04 PM, andy pugh wrote:
>
> I can fit M3 bolts quite nicely. However the Inventor bolted joint
> designer reckons I need 175 of them.
> (12 M6 bolts is fine too)
>
I think a tensile strength of a typical carbon steel M3 bolt should be
around 4kN---why does Inventor thin
On Friday 14 December 2012 23:54:06 Kent A. Reed did opine:
> On 12/14/2012 10:40 PM, Peter C. Wallace wrote:
> > On Fri, 14 Dec 2012, Kent A. Reed wrote:
> >> On 12/14/2012 9:57 PM, Gene Heskett wrote:
> >>> Greetings;
> >>>
> >>> I never got far enough in math to know what a 'derivative' is. D
On Friday 14 December 2012 23:50:04 Peter C. Wallace did opine:
> On Fri, 14 Dec 2012, Kent A. Reed wrote:
> > Date: Fri, 14 Dec 2012 22:41:54 -0500
> > From: Kent A. Reed
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> >
> >
> > To: "Enhanced Machine Controller (EMC)"
> > Subject
On Friday 14 December 2012 23:02:12 andy pugh did opine:
> On 15 December 2012 02:57, Gene Heskett wrote:
> > I never got far enough in math to know what a 'derivative' is. Does
> > anyone have a URL where I could learn a bit about this function?
>
> It is largely the same as a differential, a
On 12/14/2012 10:40 PM, Peter C. Wallace wrote:
> On Fri, 14 Dec 2012, Kent A. Reed wrote:
>
>> On 12/14/2012 9:57 PM, Gene Heskett wrote:
>>> Greetings;
>>>
>>> I never got far enough in math to know what a 'derivative' is. Does anyone
>>> have a URL where I could learn a bit about this function?
On Fri, 14 Dec 2012, Kent A. Reed wrote:
> Date: Fri, 14 Dec 2012 22:41:54 -0500
> From: Kent A. Reed
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Question on the loadable module ddt
>
> On 12/14/2012 9:57 PM, Gene H
On 15 December 2012 02:57, Gene Heskett wrote:
> I never got far enough in math to know what a 'derivative' is. Does anyone
> have a URL where I could learn a bit about this function?
It is largely the same as a differential, a measure if how one
quantity changes as a function of an input.
In g
On 12/14/2012 9:57 PM, Gene Heskett wrote:
> Greetings;
>
> I never got far enough in math to know what a 'derivative' is. Does anyone
> have a URL where I could learn a bit about this function?
>
> Thanks.
>
> Cheers, Gene
Actually, the wikipedia article isn't bad:
http://en.wikipedia.org/wiki/D
Greetings;
I never got far enough in math to know what a 'derivative' is. Does anyone
have a URL where I could learn a bit about this function?
Thanks.
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howders
Viesturs Lācis wrote:
> The small problem here is that putting encoder on ballscrew is just a
> waste of encoder as the nut is rotating and the screw is fixed :))
>
Oh, yes, in this case, the encoder would need to either be on the motor, or
driven by a separate belt from the rotating nut. If one
> From: jp@hotmail.com
> To: emc-users@lists.sourceforge.net
> Date: Thu, 13 Dec 2012 21:07:40 +0100
> Subject: Re: [Emc-users] linear scales Heidenhain
>
>
> Dear Viesturs,
>
>
> Thanks for your reply. I m sure that these linear scales from Heidenhain in
> combination with a Heidenha
If you want an in-expensive way to convert Heidenhain 11uA analogue sine wave
current output scale signals to TTl then Google 'IC Haus'.
They do an evaluation board for their chip 'iC-NV' which with the addition of 2
resistors will convert sine to square with interpolation values upto 16.
Tim
Se
On 14 December 2012 05:08, Przemek Klosowski
wrote:
> Perhaps use a split housing that has thick
> enough bosses in front of and behind the bearing outer race, so that you
> can bolt the cog wheel and ballnut to them, and another pair of mating
> bosses on top of the bearing, so that you can bolt
On 14 December 2012 21:13, Thomas J Powderly wrote:
> it's 'sorta like a resolver' :)
> and EXE boxes are expensive ( i got a set of 4 but i use them :| )
Sounds like an easy enough job for the AtoD on an Arduino.
Basically like my Arduino Resolver convertor (abandoned) without the
sine-wave ge
On 12/13/2012 02:07 PM, jean-paul coninx wrote:
> Dear Viesturs,
>
>
> Thanks for your reply. I m sure that these linear scales from Heidenhain in
> combination with a Heidenhain controller
> have a analog output. I also know that some of the Maho mills (from few year
> later) have a Philips 432
On Fri, Dec 14, 2012 at 2:12 PM, Peter Blodow wrote:
Fifth, considering the fact that LinuxCNC has apparently turned into a
> widely commercially used system in the US (I can tell from the mail
> group threads) which cannot work in Germany, there are not many serious
> users hereabouts. I would d
what does the rs422-->rs232 convert do exactly?
sam
On 12/14/2012 2:46 PM, Viesturs Lācis wrote:
> 2012/12/14 andy pugh :
>> On 14 December 2012 20:19, Viesturs Lācis wrote:
>>
>>> For example, today I started the system up, all 4 motors had set
>>> bldc.value = 0.15; motors 0 and 1 were spinning
On 14 December 2012 20:46, Viesturs Lācis wrote:
> Motors have 1000 CPR encoders. If I turn motor one turn in one
> direction, rawcounts pin increments approximately by 4000,
That might be correct.
> if I turn
> it one turn in opposite direction, it also increments by different
> number (it is
2012/12/14 andy pugh :
> On 14 December 2012 20:19, Viesturs Lācis wrote:
>
>> For example, today I started the system up, all 4 motors had set
>> bldc.value = 0.15; motors 0 and 1 were spinning, 2 and 3 were standing
>> still. I tried to get them spinning too by changing bldc cfg=h and
>> later a
Thank you.
It looks like a 4axis hot wire wax cutter could employ this without too
much trouble. Then feedrate would be adaptive rather than needing to prove
out each path in advance. >> faster one-offs.
Much more digging ahead.
Best,
Jason
On Dec 14, 2012 2:33 PM, "andy pugh" wrote:
> On 14 D
2012/12/14 Peter C. Wallace :
>
> We sell industrial temperture range: -40c to +85C rated 7I39s
> these run at -40C and +85C in our temperture chamber, SO I dont think there is
> a temperature sensitivity in the 7I39
Yes, I remember reading that somewhere, but the question is: are _all_
7i39 car
On 14 December 2012 20:19, Viesturs Lācis wrote:
> For example, today I started the system up, all 4 motors had set
> bldc.value = 0.15; motors 0 and 1 were spinning, 2 and 3 were standing
> still. I tried to get them spinning too by changing bldc cfg=h and
> later also to cfg=n. Well, those moto
On 14 December 2012 20:11, andy pugh wrote:
> Yes, there is a feed-override pin in HAL.
As others have said, I meant motion.adaptive-feed. Not halui.feed-overrde.
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
On Fri, 14 Dec 2012, Viesturs L?cis wrote:
> Date: Fri, 14 Dec 2012 22:19:02 +0200
> From: "[UTF-8] Viesturs L?cis"
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: [Emc-users] 5i23 and 7i39 mystery
>
> Hello!
>
> Last 2 days I have bee
Fantastic!
Thanks for the starting point tips. I now have some homework to do to ask
intelligent followup questions.
Thanks again.
Jason
On Dec 14, 2012 2:17 PM, "sam sokolik" wrote:
> If you can get the analog signal into linuxcnc - look at
> 'motion.adaptive-feed ' from here.
> http://www.l
Hello!
Last 2 days I have been trying to get the plasma table working in
client's site and it is driving me totally crazy. The thing is that I
am stuck with getting the motors to spin - the observed behavior is
total mystery to me.
For example, today I started the system up, all 4 motors had set
b
2012/12/14 Jason Burton :
> Hello,
>
> Is it possible to continuously adjust feedrate along a path?
>
> The application I am exploring is similar to wire EDM. A circuit monitors
> the spark gap characteristics and provides an analog output.
>
You can use motion.adaptive-feed pin to adjust the feed
If you can get the analog signal into linuxcnc - look at
'motion.adaptive-feed ' from here.
http://www.linuxcnc.org/docs/2.5/html/man/man9/motion.9.html
would allow you to adjust the feed on the fly - atleast 1000 times a
second :)
sam (I know of atleast one person that has used this for edm.
There is something called "adaptive feed". A HAL pin on the
motion module, that can be varied from 0.0 to 1.0, and will
change the feedrate proportionally. It is read at the servo rate
(normally 1mS). It was added with EDM in mind.
You will need an analog input to get your signal into HAL.
O
On 14 December 2012 20:06, Jason Burton wrote:
> Is it possible to continuously adjust feedrate along a path?
Yes, there is a feed-override pin in HAL.
> Hoping someone has already done an EDM in LCNC and I just haven't found
> it...?
There is a problem with the current interpreter, it can't r
Hello,
Is it possible to continuously adjust feedrate along a path?
The application I am exploring is similar to wire EDM. A circuit monitors
the spark gap characteristics and provides an analog output.
Vectored feedrate would be adjusted multiple times per second based on the
value.
Hoping som
On 13 December 2012 23:39, Andrew wrote:
> Also I'd turn the motor tail to the left, and make the hollow shaft a bit
> shorter if needed.
I don't know if that was advice to me, but it looks like I need to do
that, as I just realised that I can't get to the table clamps with my
original positioni
Gentlemen,
let me explain why this translation business is so complicated. I have
translated novels from English to German years ago (for earning money)
and l know what I'm talking about. I have also translated a couple
hundred sentences of EMC code some months ago (and never seen any of
them a
2012/12/14 Jon Elson :
> Dave Caroline wrote:
>> if the encoder is on the motor there will be a small hysteresis to the
>> movement due to the friction.
>> if on the screw then I can see a small effect on the loop as the servo
>> will move and not the screw.
>> can you rotate 90 degrees and hang th
2012/12/14 Andrey :
>
> Viesturs, if you read in Russian you can find something here :
> http://www.cnc-club.ru/forum/viewforum.php?f=15
Thank You!
--
Viesturs
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
---
Dave Caroline wrote:
> if the encoder is on the motor there will be a small hysteresis to the
> movement due to the friction.
> if on the screw then I can see a small effect on the loop as the servo
> will move and not the screw.
> can you rotate 90 degrees and hang the motor below.
>
I put the
On 14 December 2012 14:56, Todd Zuercher
wrote:
> You know you can buy rotating nut assemblies, such as here:
> http://hiwin.com/html/ball%20screws/r1.html
I didn't know that, no. I think one would probably fit, too. However
they all seem to have 1:1 pitch to diameter?
--
a
On Fri, Dec 14, 2012 at 11:59:11AM +, andy pugh wrote:
>
> I wonder if it would make sense to feed the documents through an
> auto-translator?
One of our primary output formats is html, and the up-to-date English
docs are on www.linuxcnc.org. If any user wants to read these through
the googl
You know you can buy rotating nut assemblies, such as here:
http://hiwin.com/html/ball%20screws/r1.html
- Original Message -
On 14 December 2012 05:08, Przemek Klosowski
wrote:
> The collar squeezes the inner race, so it presumably is split, with a gap
> between the front and rear race,
You would have to do that paragraph by paragraph making sure not to
translate links... There was an attempt to do this in the past and the
comment I received was the translation was pure rubbish. The problem
seems to be the translators don't speak geek!
On 12/14/2012 5:59 AM, andy pugh wrote:
On 14 December 2012 11:59, andy pugh wrote:
> I wonder if it would make sense to feed the documents through an
> auto-translator?
http://en.wikipedia.org/wiki/Duolingo Perhaps?
http://www.ted.com/talks/luis_von_ahn_massive_scale_online_collaboration.html
--
atp
If you can't fix it, you don't
On 14 December 2012 11:50, John Thornton wrote:
> That is my thoughts exactly, why clutter up the repo with untranslated
> docs
I wonder if it would make sense to feed the documents through an
auto-translator?
It wouldn't be a clean translation, but it might be enough for a
German/Polish reader t
That is my thoughts exactly, why clutter up the repo with untranslated
docs. All the master docs and the html indexes use the English docs
unless it is a real translated chapter in the case of the Spanish docs.
On 12/13/2012 4:19 PM, Sebastian Kuzminsky wrote:
> On 12/13/12 15:11 , John Thornto
That is my thoughts exactly, why clutter up the repo with untranslated
docs. All the master docs and the html indexes use the English docs
unless it is a real translated chapter in the case of the Spanish docs.
On 12/13/2012 4:19 PM, Sebastian Kuzminsky wrote:
> On 12/13/12 15:11 , John Thornto
On 14 December 2012 01:28, Leonardo Marsaglia
wrote:
> I know there are several Cam programs that could mill a lobe, but I think
> is better to use nurbs or something like that to generate the toolpath
> without using a Cam program, the only tricky thing would be the radius
> compensation for the
On 14 December 2012 05:08, Przemek Klosowski
wrote:
> The collar squeezes the inner race, so it presumably is split, with a gap
> between the front and rear race, not reflected in the drawing, right?
Yes. I didn't bother modelling that. I realise that seems odd when I
did model the individual ba
On 14 December 2012 09:15, Dave Caroline wrote:
>> https://picasaweb.google.com/lh/photo/7PPw4pWFfZy_jHDMq_KbmdMTjNZETYmyPJy0liipFm0?feat=directlink
> The thing that grates with me is the rear contact of the belt to the casting.
Let me put your mind at rest and point out the tensioning/guide ro
On Fri, Dec 14, 2012 at 12:36 AM, andy pugh wrote:
> On 14 December 2012 00:21, andy pugh wrote:
>
>> It is rather a tight fit under the table, between the ways.
>
> https://picasaweb.google.com/lh/photo/7PPw4pWFfZy_jHDMq_KbmdMTjNZETYmyPJy0liipFm0?feat=directlink
>
The thing that grates with me
On Fri, 14 Dec 2012 00:04:34 +, you wrote:
>On 13 December 2012 23:39, Andrew wrote:
>
>>> The belt profile is rather simple HTD 5M. It was cut with nearly round
>> shaped fly cutter, then some fillets made on sharp edges of teeth.
>
>Ah, I am typically using T5 belts, which are squarer.
And
On Friday 14 December 2012 03:11:46 Gene Heskett did opine:
> On Friday 14 December 2012 02:56:07 Tim James did opine:
> > Google Allegro ACS712 Current Sense IC, this would do what you want.
>
> Not without additional gain, Tim. Its an AC output, with the quiet
> output sitting at Vcc*0.5. Sen
On Friday 14 December 2012 02:56:07 Tim James did opine:
> Google Allegro ACS712 Current Sense IC, this would do what you want.
Not without additional gain, Tim. Its an AC output, with the quiet output
sitting at Vcc*0.5. Sensitivity for the most sensitive one is .185 mv/A.
Thanks, that is an
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