s as always for your help!!
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g buy it's what I think.
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o get it here.
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al circuit but backwards. The original circuit is not using a Sine
wave but a square wave for feeding the input, then in the output the signal
is a rounded one by the action of the coils, don't know if it's a perfect
Sine wave.
I hope next week I can measure it and may be I can u
n a few days because I think I'm going to
excite the coils with an oscillator. It's not that easy to use the
machine's source because I would have to re-solder the wires on the plug.
--
*Leonardo Marsaglia*.
-
rmer where the voltage
varies proportional to the transformation ratio, but the angle gives a
difference in the amplitude too is that right?
--
*Leonardo Marsaglia*.
--
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de an executive decision to switch to
> encoders. We have some 5000 line differential thru-hole would only
> require a small adapter..
>
I see, I would expect this ones to last at least 5 years more (or even more
why not?), but in any case It's good to know how to exchange them in case
know.
I guess they have a normal ratio but I would like to be sure.
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PR at least and ideally 1
PPR, I don't trust the PID using only 1000 PPR because I think I will be
compromising the accuracy since I tend to use increments of 0.01 mm on this
machine. There are some 5000 PPR encoders on ebay at USD 1
the control board of the spindle drive wich is almost
the same price of the entire Yaskawa drive.
Here's a pic of the new drive installed: http://i.imgur.com/qhzzxmt.jpg
The old fanuc demaned all the space you see there. This one is occupying
1/5 of the original drive. I guess your lath
them even if it's not that easy to
adapt them to LinuxCNC. It would be great if I can read them the way they
are working right now, as Peter said It wouldn't be necessary A/D circuitry
so I guess with HAL programming
ter to use encoders from
scratch which I know they will work.
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let this for a
experimentation project. I think about this because I would like the
machine to be running as quick as possible with LinuxCNC.
2014-12-03 21:22 GMT-03:00 Peter C. Wallace :
> On Wed, 3 Dec 2014, Leonardo Marsaglia wrote:
>
> Date: Wed, 3 Dec 2014 20:42:29 -0300
>
hat I can adapt these to LinuxCNC, I
don't want to fit encoders because these resolvers are robust and they are
working pretty well.
Any ideas? Since there's a lot of people here that dealed with this before
I'm sure you're going to know everything about t
, the idea is to use coils
with the shape of the lobe. The problem of the non homogeneous occurs more
with high lift camshaft.
http://youtu.be/RmW3_c0-4Oc.
--
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--
Download BIRT iHub F-Type - The
nyway, I remember that because the person told me that there are lot of
old monster like the one you mentioned that needed camshaft rebuild because
the newer oils are far worse for systems without rollers.
--
*Leonardo Marsaglia*.
--
#x27;m aware that a few relevant points around the lobe
will do the trick for making the profile accurate enough, the main concern
for me is that I need to offset the angular position as I change from one
lobe to the next one.
m close to 1200 RPM sometimes, but that's not
going to be a problem for these encoders, nor the hardware for reading them.
--
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--
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sing the encoder and only one proximity switch for the index pulse.
--
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2014-11-24 22:19 GMT-03:00 Leonardo Marsaglia :
> It's tempting also ,in my case, to machine a 360 teeth gear and use these
> sensors only. If they do the trick it's a good solution too.
>
Mod 1.0 is like 362 mm in diameter. So unless the sensors are capable of
sense it, i
o ,in my case, to machine a 360 teeth gear and use these
sensors only. If they do the trick it's a good solution too.
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f
a because if I have to buy them from Digikey as
Jon did I will have to spend a lot more on shipping than on the sensors.
But the good thing is that it works well!
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--
Download BIRT iHub F-T
to test your method for non circular turning to rough cut some
camshafts on the lathe.
At least I'm sure the ones with low lift are going to be possible to turn.
I'm not sure about the ones with 9 mm and more lift, because of tool
roximity switches. 20 khz anyway is good
enough since the Z is going to be true once per revolution.
Thank you Dave!
--
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--
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from A
be, combined with the
radius in wich it's installed would affect the accuracy of that zero? or is
not that critical?
Because in my head I'm picturing the rise and fall signals and I'm worried
about where the zero rising point will fall, but may be it's not that
counters counting by software but I would
lose the zero position everytime I turn of the machine so a physical zero
would be ideal.
--
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--
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#x27;s working
with hall sensors only, I guess some hal logic will work just fine.
--
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your help! I'm going to check out now
the forum to know a little more about how you did it.
So the drivers work with +/- 10 volts, that's great because I couldn't find
anything about that yet, but anyway I could meas
hey should turn. The tachos will be telling to the drives the
actual speed and I would only have to close the loop on LinuxCNC using the
resolvers. I guess it's not more difficult than that. But I would love to
hear suggestions!
--
*Leonardo Marsaglia*.
-
Mitsubishi DC servos, and the drivers look like
they are Meldas, although they have the Mitsubishi logo.
They have the tachometer on the motors, and resolver directly coupled on
the screws.
--
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you suggested since they work really
great and also everything is already mounted so practically I don't have to
touch anything of the mechanical units.
I hope I can do some testing soon because replacing the original control
wi
n there about how to
tune the parameters using the presets on the driver. I think I saw
something like that in one of the PDFs that I have, I don't know if it's
the same. I hope I don't have to touch any of that, since the mayority of
those parameters are factory
2014-11-18 22:05 GMT-03:00 Leonardo Marsaglia :
> Hello to all!
>
> A few months ago our Mazak spindle died and we replaced it with a new one
> of the brand Yaskawa. The lathe is behaving well but it's a good idea to
> replace the control with a LCNC machine following a planned
ht be the right specs for the motors.
Sorry for the long description but my question is: Is it possible to use
these drivers? or is it going to be a lot of trouble to get them to work
with LinuxCNC??
Thanks as always for your help!
--
*Leonardo Marsaglia*.
---
all of these projects. Most of the
people are not interested in space travel and what's beyond this planet,
hence nobody wants to invest a lot of money on that. The sad thing is, all
the great achievements and progress
ty, unless they come with a better
system.
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http://wiki.linuxcnc.org/cgi-bin/wiki.pl?UpdatingTo2.7
>
>
> Happy upgrading! Let us know how it works for you.
>
>
> --
> Sebastian Kuzminsky
>
>
>
> ------
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om your mobile device.
> http://p.sf.net/sfu/Zoho
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ss!
> Something like leading a horse to water. ;-)
>
> Dave
>
> On Fri, 2014-07-18 at 11:23 -0400, Dave Cole wrote:
> > On 7/17/2014 6:37 PM, Leonardo Marsaglia wrote:
> > > 2014-07-17 16:18 GMT-03:00 dave :
> > >
> > >> Mazak's policy i
w the DC servo drives work, because the idea is to mantain the
originals, because the are working great.
I'll be telling you how this is going! But as always thank you guys for
being so kind and helpful!
--
*Leonardo Marsaglia*.
olvers. The only doubt I have
about that is If I can use the original drives with LinuxCNC, because that
would be great.
Thanks as always and I hope I can make it work soon! Please let me know if
you have any advice or anything because you have a lot more knowledge than
me!
Leonardo.
2014-07-1
we were using the lathe with an old CGA monitor,
because the frequency is the same. I bought an adaptation board from CGA to
VGA so now I can use any monitor. But yes, they're thiefs!
--
*Leonardo Marsaglia*.
--
spindle drive, and then from there, there are several
pins that output to the NC to tell the spindle speed, and if there is a
fault condition. I guess I will have to work in reverse engineering to know
how the signals work, because now with the alarm I can't even move the
joints.
--
*Leonardo
anuc. Even a guy with a problem in a Mazak,
said that they would charge you for a list of parameters from and old
machine.
--
*Leonardo Marsaglia*.
--
Want fast and easy access to all the code in your enterprise? Index
aps or not, it's nice how much one can learn
from these circumstances :).
Thank you Jon.
--
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--
Want fast and easy access to all the code in your enterprise? Index and
search up to 200,000 lines of code
hanks as always!
Leonardo
2014-07-16 13:04 GMT-03:00 Leonardo Marsaglia :
>
> 2014-07-16 12:39 GMT-03:00 John Kasunich :
>
>> The voltage drop when a compressor or other large motor starts only
>> lasts a tenth of a second to maybe a second or two. Too short to see
>> with
replacement to see if that fix the problem. I don't know if I can test
them, but anyway I want to know how much do they cost.
--
*Leonardo Marsaglia*.
--
Want fast and easy access to all the code in your enterpr
blinked
in a different frequency of that one it's suspended. I opened it and there
where two electrolytic caps a little swollen. I replace them and the
monitor is still working.
I hope that's it, because if not I have to figure out how to make it work
at leas
me to time, but I don't think that's a sign of something
wrong.
It's really weird indeed the multimeter behaviour when the problem ocurred,
because, may be someone with more knowledge about electricity than me knos
why whis could happen.
Now everything seems to be normal, even at the
of the lathe
transformer and everything is ok. The fuses are OK too, so I'm thinking
about the capacitors as dave pointed out.
Please don't think it has nothing do to, every help is well received :).
--
*Leonardo Marsaglia*.
2014-07-15 23:21 GMT-03:00 Stuart Stevenson :
> www.fanucworld.com is a very good resource
Thank you Stuart, I just sended an email to them to see if they can help
me.
--
*Leonardo Marsaglia*.
--
Want fast and e
an easy way to know what's going on with
the driver.
--
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search up to 200,000 lines of code with a free copy of
it happen
> when you turn the main power on? or when you release the machine from
> estop?
In general the alarm showed at the moment you turn on the machine, but this
time it happened even after I started to work.
--
*Leonardo Marsaglia*.
efore replace them?
My brother has a digital oscilloscope that can measure capacitance but I
don't know if that's ok for this kind of capacitors. But I guess if they
are in the range the oscilloscope can measure I migh
dentify the wires so the control can work.
I hope you can give me a hand to diagnose the problem so I can take
measures about it because I need this machine to work.
Sorry for the long text by I like to be explicit about the probl
Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
>
>
> --
> Learn Graph Databases - Download FREE O'Reilly Book
&
basic GUIs but is it
possible for the keystick gui to run in the command line enviroment?
If you don't have the need of the graphical toolpath that's powerful and
little resource consuming.
--
*Leonardo Marsaglia*.
> Time is money. Stop wasting it! Get your web API in 5 minutes.
> www.restlet.com/download
> http://p.sf.net/sfu/restlet
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f I take 4 or more decimal places the number I get
it's pretty much what I expect. But I was using 3 places and the final
result dissapointed me.
--
*Leonardo Marsaglia*.
--
Time is money. Stop wasting it! Get your
ch with a grinder that we have
working with steppers for the X axis. It's going to be slow because of the
reduction but it's a beggining to see if this works. If I have some
progress I will upload some videos!
--
*Leonardo Marsaglia*.
-
ting point variables but it seems to make no
difference. Do you guys know why I have this difference in the numbers? Is
it because I'm working in radians with the component, and with the
calculator I'm using degrees?
Thanks as always!
2014-05-28 22:34 GMT-03:00 Leonardo Marsaglia :
>
making the calculations. I get a little difference when I do it on the
calculator by hand.
Anyway, consider that now I'm using steel master cams to reproduce the
lobes, and I doubt I can handle that accuracy now.
I hope I'm clear about what I'm trying to explain, if not please let
degrees for my lobes. One for the angle of the
lobe, and the other one for the displacement at that angle. So the idea is
to load the array with M66 functions in gcode. This way I can use different
programs with the same component. I guess it
e la medida del desplazamiento de la leva para un
angulo dado, se carga desde g-code mediante m66";pin in float rad "Radio de
piedra actual";pin in bit carga "Habilitacion para cargar el
array";function _ ;license "GPL";author "Leonardo Marsaglia"#i
stian Kuzminsky :
> On 05/27/2014 07:39 PM, Leonardo Marsaglia wrote:
> > Hello to all.
> >
> > I'm in the process of compiling a module to do some calculations for
> > machining lobes like the one Andy did a while ago.
> >
> > The problem is that when
27;s causing
this, please let me know if it's a common mistake.
As always thank you for your help!
--
*Leonardo Marsaglia*.
--
Time is money. Stop wasting it! Get your web API in 5 minutes.
ww
pic but, may I say that I'm becoming sort
of a fan of you? :)
Love that motor!
--
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--
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Instantly run your Selenium tests a
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ux installed.
I let you know when It's done.
Leonardo.
--
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"Graph Databases" is the definitive new guide to graph databases an
Sorry for the mistakes! I was writing a little too fast, but I think it's
legible :)
2014-04-18 13:00 GMT-03:00 Leonardo Marsaglia :
> Well, I can help with the spanish translations, I'm OK with the english
> but may be some people don't, although it seems there are
our free book today!
> http://p.sf.net/sfu/NeoTech
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---
motors and it's working nice.
2014-03-25 22:02 GMT-03:00 Dave Cole :
> That is a good price for a drive that can do that.
>
> Sounds like the motor will last a very long time if you run it as you
> describe.
>
> Dave
>
> On 3/25/2014 6:09 PM, Leonardo Marsaglia wrote:
&
permanent magnet AC motors up to 5 kw. Also, it was 700$ on
ebay with free shipping so it was really tempting.
--
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ead about the simple tuning method is that you must set I and
D to 0 and then increase P until the output oscillates and then compensate
the oscillation with I. My concern is, does the oscillation starts when I
increase P? or do I have to disturb the motor to see the oscillation?.
Thanks!
--
s really good!
>
> Nice work!
>
> What resolution encoder do you have on the motor?
>
> Dave
>
> On 3/24/2014 7:51 PM, Leonardo Marsaglia wrote:
> > Taking back to life this topic.
> >
> > I just uploaded a crappy video (sorry for the quality it was filmed with
>
Leonardo.
2013-12-13 11:32 GMT-03:00 Gene Heskett :
> On Friday 13 December 2013 09:07:06 Gregg Eshelman did opine:
>
> > On 12/12/2013 3:26 PM, Leonardo Marsaglia wrote:
> > > 2013/12/11 Dave Cole
> > >
> > >> It sounds like you are greatly si
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Hi Andy,
Yes. That was causing the error. Didn't know too much about those changes.
Also, you're right, the old version installed on this computer was 2.3.X.
Thanks for helping me out!
Leonardo.
2014-02-26 7:14 GMT-03:00 andy pugh :
> On 26 February 2014 02:29, Leonardo Marsa
[ 23.034294] hm2: unloading
[ 23.094220] RTAI[math]: unloaded.
[ 23.146039] SCHED releases registered named ALIEN RTGLBH
[ 23.177385] RTAI[malloc]: unloaded.
[ 23.276188] RTAI[sched]: unloaded (forced hard/soft/hard tran
you have really good Christmas and
a happy new year!!!
Best wishes from Argentina.
Leonardo Marsaglia.
2013/12/25 Gene Heskett
> On Wednesday 25 December 2013 07:33:51 Jon Elson did opine:
>
> > On 12/24/2013 05:13 PM, Peter Blodow wrote:
> > > Gentlemen,
> > > I wi
ther nylon 6 nut for a lathe that's going to be used
for gundrilling. I honestly say that I'm impressed on how the nut works,
but It would be a good chance to try that method too. Special care has to
be taken in polishing the screw I guess, if not taking out the nut would be
It's a really nice idea, I've never thought about making a thread with that
method but I think I gonna try next time I have to make a non metal thread.
2013/12/12 andy pugh
> On 12 December 2013 22:30, Leonardo Marsaglia
> wrote:
> > Are Delrin and Acetal all that dif
or nylon, buy it has
almost no backlash). I think if may be synchronous belts and pulleys were
used the vibration would be a lot less. Off course it would have to be a
really good and robust belt.
2013/12/12 Leonardo Marsaglia
> Greg and Gene (this is to avoid quoting a lot of text because you w
ted at all the thread and machine on
the lathe. Are Delrin and Acetal all that different? I mean, is not
possible to thread them in the normal way?
Thank you!
2013/12/12 Leonardo Marsaglia
>
> 2013/12/11 Dave Cole
>
>> It sounds like you are greatly simplifying the machine. An M
going to be with the heater but may
be using line filters could help.
--
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--
Rapidly troubleshoot problems before they affect your business. Most IT
organizations don't have a clear picture of
al easy to machine? When you're talking about heat molded I
assume is the way they make the long bars which they fraction later.
--
*Leonardo Marsaglia*.
--
Rapidly troubleshoot problems before they affect your business
DC
motor and the AC motor using a electromagnetic clutch. That was a hell of
KW wasted for a simple process, even for that year (1975) they could have
used DC servos. Anyway, that's all gone now and I'm glad LinuxCNC is again
making me happy with its result :).
--
*Leonardo Marsaglia
n
nut. This is an idea for the future of course now I need the machine on
production :).
I will try to uplad some videos this weekend.
--
*Leonardo Marsaglia*.
--
Rapidly troubleshoot problems before they affec
cs
> Pro!
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nk
it's too much for the VFD and motor.
Any ideas?
Thanks!!
2013/12/10 Leonardo Marsaglia
> Well. I have some good news at leat based on my experience tuning servos.
> I mounted the motor and now is working moving the screw (this is a SAE 1045
> steel screw with a nut made out of ny
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Rapidly troubleshoot problems bef
t; Thanks as always!
>
>
> 2013/12/6 Jon Elson
>
>> On 12/05/2013 09:35 PM, Leonardo Marsaglia wrote:
>> > 2013/12/5 Jon Elson
>> >
>> >> Is this a flux vector drive, or a standard VFD? A
>> >> flux-vector drive can
>> >> pe
x27;t need
centesimal accuraty, but now I need to ged rid of that oscillation that
doesn't stop. I will try and see what happens the I'll tell you. Off course
I'll be uploading some videos when it's working :).
Thanks as always!
2013/12/6 Jon Elson
> On 12/05/2013 0
th +/- 10 volts and without any
acceleration or breaking assistance, so all the acceleration a deceleration
it's done by the PID of LinuxCNC.
--
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--
Sponsored by Intel(R) XDK
Develop, test and di
om LinucCNC is 0 I still have 1 hz or so. I can tune
this within the VFD.
Tomorrow I will take a look and then I'll tell if I can improve the
behaviour of the motor.
--
*Leonardo Marsaglia*.
--
Sponsored by Intel(R
it's
> connected to the screw it will behave a lot different, I'll be ataching the
> motor in the next days because I'm finishing the mechanical adaptation for
> the encoder.
>
>
> 2013/12/4 andy pugh
>
>> On 4 December 2013 22:19, Leonardo Marsaglia
>&
l be ataching the
motor in the next days because I'm finishing the mechanical adaptation for
the encoder.
2013/12/4 andy pugh
> On 4 December 2013 22:19, Leonardo Marsaglia
> wrote:
>
> > I managed to move the motor and do some tests but I can't get rid of the
>
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