Hello to you all:
My name is Pablo Valbuena. Some years ago I followed the activity of
the EMC group. I even attended the 2004 annual meeting in Ann Arbor.
There I met many of the great contributors, among them Ray Henry. I
have tried to find his email on the list archives, but the two
addresses t
On Friday, May 25, 2012 10:19:59 PM Jon Elson did opine:
> gene heskett wrote:
> > However, if the problem is related to the spikes on the line caused by
> > slow recovery characteristics of the diodes in this kits high voltage
> > DC supply, those spikes will be attenuated by the poor high freque
John Thornton wrote:
> Ok, what I had been running was 4x60uf caps between 1 and 3 and 1x60uf
> cap between 2 and 3 (generated leg on 3 then) and that seemed to work
> the best.
>
You may just need to up these capacitors.
> at the phase converter
> to ground 1 = 120v, 2 = 120v, 3 = 226v
> phas
gene heskett wrote:
>
> However, if the problem is related to the spikes on the line caused by slow
> recovery characteristics of the diodes in this kits high voltage DC supply,
> those spikes will be attenuated by the poor high frequency response of the
> transformers. They won't look as if th
On Friday, May 25, 2012 04:25:36 PM John Thornton did opine:
> Gene,
>
> The scope is a Tektronix 2232 if you can shed any light on how to
> capture two waves with it I'm all ears.
>
> Thanks
> John
Post (or PM to me) a pic sharp enough to read control labels & I'll see
what I can remember. I
On Friday, May 25, 2012 04:16:35 PM John Thornton did opine:
> It's two miles away up on the highway. The cost would be enormous to get
> 3 phase out here in the woods. Just guessing based on other information
> I've gathered about bringing 3 phase to a shop about 50k or so to bring
> 3 phase to m
On 25 May 2012 20:17, John Thornton wrote:
> The infeed unit is a 6SN1145-1BA00-0BA0
This looks like the manual.
http://support.automation.siemens.com/WW/llisapi.dll/csfetch/59401543/PJU_0212_en.pdf?func=cslib.csFetch&nodeid=60683460&forcedownload=true
There is an interesting section about how
On 5/25/2012 1:33 PM, Peter C. Wallace wrote:
> On Fri, 25 May 2012, andy pugh wrote:
>
>
>> Date: Fri, 25 May 2012 18:19:39 +0100
>> From: andy pugh
>> Reply-To: "Enhanced Machine Controller (EMC)"
>>
>> To: "Enhanced Machine Controller (EMC)"
>> Subject: Re: [Emc-users] Commutating Reac
Gene,
The scope is a Tektronix 2232 if you can shed any light on how to
capture two waves with it I'm all ears.
Thanks
John
On 5/24/2012 9:17 PM, gene heskett wrote:
> On Thursday, May 24, 2012 09:59:35 PM John Thornton did opine:
>
>> My research shows that a suitable single phase motor to dri
It's two miles away up on the highway. The cost would be enormous to get
3 phase out here in the woods. Just guessing based on other information
I've gathered about bringing 3 phase to a shop about 50k or so to bring
3 phase to my shop. Heck they wanted 15k to connect up my other brother
John'
Ok, what I had been running was 4x60uf caps between 1 and 3 and 1x60uf
cap between 2 and 3 (generated leg on 3 then) and that seemed to work
the best.
at the phase converter
to ground 1 = 120v, 2 = 120v, 3 = 226v
phase to phase 1 + 2 = 244v, 2 + 3 = 248v, 1 + 3 = 262v
at the 380v taps on the tr
Andy,
The infeed unit is a 6SN1145-1BA00-0BA0
If you can shed any light in that tunnel that would great
Thanks
John
On 5/25/2012 6:45 AM, andy pugh wrote:
> On 25 May 2012 11:42, John Thornton wrote:
>> Thanks for the price sheet. That is over double what I can get a diesel
>> generator for ar
On 25 May 2012 13:09, andy pugh wrote:
> I will get pictures later.
https://picasaweb.google.com/lh/photo/izs9EehSiBmY_omIxaSJBtMTjNZETYmyPJy0liipFm0?feat=directlink
Central diameter is 46mm, there are 512 window/bar combinations, so
2048 counts per rev.
--
atp
If you can't fix it, you don't
On Friday, May 25, 2012 01:02:05 PM Jon Elson did opine:
> gene heskett wrote:
> > For this it gets sticky, because you have 2 choices of how to attach
> > the scope probes, BOTH of which leave the case of the scope lethally
> > hot, so at the very least it has to be running on an isolation
> > tr
On 25 May 2012 18:57, Peter C. Wallace wrote:
>> The Mesa cards can output a 3-phase PWM.
> With a inverter of any type, a post filter is likely needed so the mill infeed
> sees nice 3 phase sine waves rather than
Indeed. And you would need to work voltage-mode too, I assume.
So, how about a 6
On Fri, 25 May 2012, andy pugh wrote:
> Date: Fri, 25 May 2012 18:48:00 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Commutating Reactor
>
> On 25 May 2012 18:39, Peter C. Wallace wrote:
>
>>
On 25 May 2012 18:39, Peter C. Wallace wrote:
> Ahh its a standard kind of thing:
>
> www.mtecorp.com/SineWave_Filter_4pg_Form1214A-2.pdf
The Mesa cards can output a 3-phase PWM. Presumably a lot of the cost
of the PhasePerfect is the control software...
(I also suspect that they might have acet
On Fri, 25 May 2012, Peter C. Wallace wrote:
> Date: Fri, 25 May 2012 10:33:19 -0700 (PDT)
> From: Peter C. Wallace
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Commutating Reactor
>
> On Fri, 25 May 2012, andy pugh
On Fri, 25 May 2012, andy pugh wrote:
> Date: Fri, 25 May 2012 18:19:39 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Commutating Reactor
>
> On 25 May 2012 18:00, Dave wrote:
>
>> For only ge
On 25 May 2012 18:00, Dave wrote:
> For only generating 1 phase (the missing leg) they are charging some
> serious money for those inverters.
They are doing rather more than a typical inverter drive does. They
create a smooth 3-phase waveform regardless of load.
--
atp
If you can't fix it, you
On 5/25/2012 12:41 PM, andy pugh wrote:
> On 24 May 2012 21:54, Dave wrote:
>
>> I just asked them for pricing...and they sent me a price sheet.
>>
> Same pricing on eBay: http://www.ebay.com/itm/370557969294
>
>
For only generating 1 phase (the missing leg) they are charging some
On 24 May 2012 21:54, Dave wrote:
> I just asked them for pricing...and they sent me a price sheet.
Same pricing on eBay: http://www.ebay.com/itm/370557969294
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
-
gene heskett wrote:
> For this it gets sticky, because you have 2 choices of how to attach the
> scope probes, BOTH of which leave the case of the scope lethally hot, so at
> the very least it has to be running on an isolation transformer, and
> sitting on an insulated table, no way around that.
John Thornton wrote:
> It's hard to say but I "think" the 15hp motor worked the best. I've been
> running and trying different things for a 1 1/2 years so my memory is a
> bit clouded on exactly how it worked or didn't work. I do know at one
> time my workaround was to ramp up the spindle from 2
So sorry, I was indeed thinking of transmissive.
j.
On Fri, May 25, 2012 at 5:18 PM, andy pugh wrote:
> On 25 May 2012 15:37, Jan de Kruyf wrote:
>
> > I have made one before with just a piece of photo negative film.
>
> Unfortunately these sensors need a shiny/non-shiny contrast.
>
> I was
On 25 May 2012 15:37, Jan de Kruyf wrote:
> I have made one before with just a piece of photo negative film.
Unfortunately these sensors need a shiny/non-shiny contrast.
I was anticipating using laserprint, but both white and black paper
are equally invisible to the sensor.
These sensors need
On Friday, May 25, 2012 10:58:04 AM andy pugh did opine:
> On 25 May 2012 15:13, gene heskett wrote:
> =
>
> > For this it gets sticky, because you have 2 choices of how to attach
> > the scope probes, BOTH of which leave the case of the scope lethally
> > hot,
>
> We had the right tool for the
Andy,
I have made one before with just a piece of photo negative film.
Speak to your trusted offset printer and ask if he still uses graphic film
and who can print it for you from a pdf or similar.
To assemble figure out some way to register it on the small metal disk you
machine on the shaft end
On 25 May 2012 15:13, gene heskett wrote:
=
> For this it gets sticky, because you have 2 choices of how to attach the
> scope probes, BOTH of which leave the case of the scope lethally hot,
We had the right tool for the job on a piece of equipment I designed
once (an electric pump dynamometer).
I did not realize that you were running the power through a step up
transformer in the machine.
I don't think that another reactor is going to help. That transformer
is going to clean up the power a lot also.
What I would do is to write down all of the part numbers you have in the
611 Rack, j
On Friday, May 25, 2012 09:35:09 AM John Thornton did opine:
> I can get the model number in a bit but it is a dual trace scope with
> storage. The second trace would show up as a horz line so I'm sure I had
> some knob in the wrong spot. I tried to follow the instructions but
> could not find whe
On Friday, May 25, 2012 09:04:33 AM John Thornton did opine:
> It's hard to say but I "think" the 15hp motor worked the best. I've been
> running and trying different things for a 1 1/2 years so my memory is a
> bit clouded on exactly how it worked or didn't work. I do know at one
> time my workar
Totally missed the second paragraph... no I've not checked to see if it
works on single phase. I'll get the model number in a bit. If you can
decipher the Siemens documents my hat is off to you sir as it is really
confusing to me.
John
On 5/25/2012 6:45 AM, andy pugh wrote:
> On 25 May 2012 11
I sent perfect phase an email with a bunch of questions so we will see
what they say. In the mean time I'll try the Fitch tuning method for the
rotary phase converter.
John
On 5/25/2012 6:45 AM, andy pugh wrote:
> On 25 May 2012 11:42, John Thornton wrote:
>> Thanks for the price sheet. That i
On 25 May 2012 13:24, John Thornton wrote:
> That's a neat solution... how will you mount the disk? I assume the disk
> is a mask for a dark background?
The encoder needs a contrast between shiny and not-shiny. A hole is
not-shiny enough (and anything behind the hole is out of focus and
invisible
That's a neat solution... how will you mount the disk? I assume the disk
is a mask for a dark background?
John
On 5/25/2012 7:09 AM, andy pugh wrote:
> I have built a motor.
> Internal space is quite tight, so I am using the Avago AEDR8340K
> encoder detector
> http://uk.rs-online.com/web/p/rota
I have built a motor.
Internal space is quite tight, so I am using the Avago AEDR8340K
encoder detector
http://uk.rs-online.com/web/p/rotary-encoders/7160604P/
(Also available from Mouser etc). This is a 3mm x 5mm two-channel
quadrature detector. TTL output wires direct to Mesa / Parport / Pico.
I
I have 2 10hp and 1 15hp motors and enough parts to make 3 rotary phase
converters. Total capital invested is in the $750-$1000 range. That size
motor used is cheap around here. As for turning it back into cash that
would be more difficult as there is not much demand for phase converters
that I
On 25 May 2012 11:42, John Thornton wrote:
> Thanks for the price sheet. That is over double what I can get a diesel
> generator for around here.
It might be a better / cleaner solution, though. And it might release
some capital if you can sell your existing rotary convertors?
How much other 3-ph
Do you have an example circuit of this that I can drool over?
Thanks
John
On 5/24/2012 11:50 PM, Erik Christiansen wrote:
> On 24.05.12 20:31, Jon Elson wrote:
>> Kirk Wallace wrote:
>>> I would think an Aurdino like processor could measure the voltage
>>> and current on each phase and switch
I can get the model number in a bit but it is a dual trace scope with
storage. The second trace would show up as a horz line so I'm sure I had
some knob in the wrong spot. I tried to follow the instructions but
could not find where it showed how to make a dual trace. It would be
nice to compair
Jon,
Thanks for that lead, a quick search and I found a 6 page instructions
for making a 10hp and tuning it up as well. He goes into great detail
and makes it simple to try. I see his start circuit is a bit different
than mine as he uses a control transformer but I have a large box of
phase co
It's hard to say but I "think" the 15hp motor worked the best. I've been
running and trying different things for a 1 1/2 years so my memory is a
bit clouded on exactly how it worked or didn't work. I do know at one
time my workaround was to ramp up the spindle from 2k to 6k and it ran
like that
Thanks for the price sheet. That is over double what I can get a diesel
generator for around here.
John
On 5/24/2012 3:54 PM, Dave wrote:
> I just asked them for pricing...and they sent me a price sheet. They
> sell direct...
>
> I pasted the PDF file to this site:
> http://privatepaste.com/dow
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