On 6/7/2012 8:46 AM, andy pugh wrote:
> On 7 June 2012 13:03, John Thornton wrote:
>
>> I
>> think I'll just leave it at 208.
>>
> Does that give you a Wye/Star to connect to ground?
>
> Why not run it 440 star and leave out the step-up transformer?
>
>
That reactor is specific to
On 7 June 2012 13:03, John Thornton wrote:
> I
> think I'll just leave it at 208.
Does that give you a Wye/Star to connect to ground?
Why not run it 440 star and leave out the step-up transformer?
--
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto
-
Nice.
I have a Deutz engine on an air compressor. They are very reliable.
A 12 wire is the ultimate setup. Can't go wrong with that.
That engine should sip fuel.
Dave
On 6/7/2012 8:03 AM, John Thornton wrote:
> Well I have convinced myself that having a standby generator of
> sufficient siz
Well I have convinced myself that having a standby generator of
sufficient size to run the whole house is a good thing. I am now the
owner of a 15Kw 2cyl deutz diesel generator. It is a 12 wire generator
and at the moment it is set up for 208 120. After reading some on the
different wiring sche
There was never any intentions on keeping the rigged up generator it was
just for a short test to try and prove a point. The only thing the
throttle man had was the DMM as the power unit didn't have a tachometer
(had the cable hanging out). Both meters on the generator were broken as
well... pr
On 6/5/2012 4:32 PM, gene heskett wrote:
> On Tuesday, June 05, 2012 04:22:05 PM John Thornton did opine:
>
>
>> This was just a cobbled up gen set with a diesel power unit like the
>> kind you see pumping water in a farmers field with a generator from a
>> river tug and a driveshaft. There was
On Tuesday, June 05, 2012 04:22:05 PM John Thornton did opine:
> This was just a cobbled up gen set with a diesel power unit like the
> kind you see pumping water in a farmers field with a generator from a
> river tug and a driveshaft. There was no feedback from the generator
> other than the DMM
This was just a cobbled up gen set with a diesel power unit like the
kind you see pumping water in a farmers field with a generator from a
river tug and a driveshaft. There was no feedback from the generator
other than the DMM that the throttle man watched and tried to keep it at
240v...
John
On Tuesday, June 05, 2012 10:58:41 AM John Thornton did opine:
> Dennis,
>
> It was all we could do to run it for 10 minutes and keep it anywhere
> near 1800 RPM... a real circus that was.
>
> John
The governors on a Cummins 335 we had at KXNE-TV, with a 150kw alternator
on it, was much closer
Sounds like you missed a good opportunity to become a Youtube star - at
least for the technically minded. ;-)
Dave
On 6/5/2012 6:51 AM, John Thornton wrote:
> Dennis,
>
> It was all we could do to run it for 10 minutes and keep it anywhere
> near 1800 RPM... a real circus that was.
>
> John
>
>
Dennis,
It was all we could do to run it for 10 minutes and keep it anywhere
near 1800 RPM... a real circus that was.
John
On 6/4/2012 1:48 PM, ceen...@in-front.com wrote:
> Did John run it for an hour or longer to be able to repeat the "only one hour
> run time situation"? I forgot what the
ceen...@in-front.com wrote:
> Did John run it for an hour or longer to be able to repeat the "only one hour
> run time situation"? I forgot what the capacity of the borrowed generator
> was to compare it to a 15HP weak leg system. Even if the generator varied in
> speed and voltage when loaded
You should have seen that redneck circus... that was funny trying to
keep the power unit running anything near 1800 RPM with no frequency
feedback.
John
On 6/4/2012 1:12 PM, Jon Elson wrote:
> ceen...@in-front.com wrote:
>> Hi John,
>>
>> Too bad you can't connect your machine to a solid 3-ph l
On Mon, 4 Jun 2012 14:34:20 -0400
gene heskett wrote:
> On Monday, June 04, 2012 02:09:42 PM Dave did opine:
>
> > You need a shop cat! Unfortunately shop cats are not effective
> > deterrents to raccoons and possums.
> >
> That depends on the cat. I met my first maine coon in about '61.
Did John run it for an hour or longer to be able to repeat the "only one hour
run time situation"? I forgot what the capacity of the borrowed generator was
to compare it to a 15HP weak leg system. Even if the generator varied in speed
and voltage when loaded, one thing should be fairly certain
On Monday, June 04, 2012 02:42:15 PM John Thornton did opine:
> My meter is a Fluke 75 rated at 1000vdc and 750vac so I should be ok...
> I've had it connected to the 600vdc buss before for quite some time when
> messing about with the RPC a few weeks ago.
>
> John
[...]
That should be ok, but m
On Monday, June 04, 2012 02:09:42 PM Dave did opine:
> You need a shop cat! Unfortunately shop cats are not effective
> deterrents to raccoons and possums.
>
That depends on the cat. I met my first maine coon in about '61. My dog
at the time, an 85 lb German Shepherd bitch, had a hate for
ceen...@in-front.com wrote:
> Hi John,
>
> Too bad you can't connect your machine to a solid 3-ph line to see if the
> same issue happens regardless of the power source.
He ran it on a Diesel generator, and it did NOT trip. So, it is
SOMTHING about
the power source.
Jon
---
I use a Fluke 77 for the same thing and I have never had any problems
yet also.
Dave
On 6/4/2012 11:59 AM, John Thornton wrote:
> My meter is a Fluke 75 rated at 1000vdc and 750vac so I should be ok...
> I've had it connected to the 600vdc buss before for quite some time when
> messing about wit
My meter is a Fluke 75 rated at 1000vdc and 750vac so I should be ok...
I've had it connected to the 600vdc buss before for quite some time when
messing about with the RPC a few weeks ago.
John
On 6/4/2012 8:23 AM, gene heskett wrote:
> On Monday, June 04, 2012 08:58:57 AM Dave did opine:
>
>>
You need a shop cat! Unfortunately shop cats are not effective
deterrents to raccoons and possums.
But I don't have any mice... ;-)
Dave
On 6/4/2012 9:52 AM, ceen...@in-front.com wrote:
> Hi John,
>
> Too bad you can't connect your machine to a solid 3-ph line to see if the
> same issue h
You just need yet another manual! ;-) Its all there, on the web,
someplace. The trick is finding it. :-)
http://www.automation.siemens.com/doconweb/pdf/840C_1101_E/611a_iaa.pdf?p=1
Page 8/48 says that a 3 on the drive module display is a motor overheat
situation. I'm not sure if this man
Hi John,
Too bad you can't connect your machine to a solid 3-ph line to see if the same
issue happens regardless of the power source. I had a handful of issues with
my '86 VMC like loose PC boards, oxidized connectors, etc. Now that it gets
more use it seems to be doing better. Keeping the c
On Monday, June 04, 2012 08:58:57 AM Dave did opine:
> If you can, pull off the bus covers and attach some wires to the bus and
> alligator clip to those wires with a good multimeter and leave it set on
> Volts DC while you run the machine. Be careful though as cheap jumper
> leads are probably n
My DMM leads have alligator clips so that is not a problem to watch the
DC buss while running. At least when the Z move to clear position is
about to fault out I have a second or two notice with the tone change to
try and focus on the DMM readout.
John
On 6/4/2012 7:41 AM, Dave wrote:
> If you
After the trip yesterday the only lights on the infeed unit that was on
was 3 external enable not present and 4 DC link charged. The spindle
drive lcd was 6 iirc and the Z was 3. I could not find anything on what
the drive lcd's mean.
I'm not having any luck in borrowing an isolation transforme
If you can, pull off the bus covers and attach some wires to the bus and
alligator clip to those wires with a good multimeter and leave it set on
Volts DC while you run the machine. Be careful though as cheap jumper
leads are probably not good for 600 volts.
But most machine tool wire ( the hea
Yesterday I made some parts and had a giant fan on the drive to see if
it is a cooling problem. After about an hour or so the drive tripped
out. I forgot to mention that the only thing moving during these faults
is the Z axis and it is moving up ie the most loaded direction. Of
course I can mak
Hi John,
On the top of section 6.3 in the PDF manual it says:
"A switch S1 is provided on the upper side of the NE and monitoring
module that
is used to set the following functions (for UI 5 kW on the front side):"
Below that line it shows the meanings of the dipswitch settings.
The "NE" is th
John Thornton wrote:
> Currently with the 10hp idler and the Samson lathe running as a second
> idler and the 611 in the BP 308 on I have the voltage balanced at 245
> between all three phases give or take one volt. The VMC will make parts
> and run at 2k with full rapid speeds or ramp up with G
My infeed looks like Fig 6-2 on page 6-143.
John
On 6/3/2012 9:44 AM, Dave wrote:
> What is your S1-3 dipswitch switch settings on the infeed module? Do
> you have regeneration back into the line turned on?
>
> That might be a situation that could cause thermal issues in the infeed
> with the p
I have verified that the infeed and the spindle drive internal fans are
working and blow air nicely out of the top. I can not however find any
dip switches on the infeed unit. I turned on all the lights and got a
flash light... in the manual it shows some of the units have the dip's
on the fron
I can't honestly say if the lights are the same, but I'll notice from
now on. BTW, the bottom 4 leds were lit up on the infeed unit the last
time I checked after a fault.
The unit itself does have a fan plus a fan in the door in front of the
611. The internal fan was pretty gummed up when I rep
What is your S1-3 dipswitch switch settings on the infeed module? Do
you have regeneration back into the line turned on?
That might be a situation that could cause thermal issues in the infeed
with the phase converter setup. I think the infeed might have some big
problems trying to regenerat
Are the lights on the infeed unit when a drive fault occurs identical to
what you saw before?
>>So now I'm thinking that there might be an actual problem in the
infeed unit because once it starts to trip out if I reset the machine
and start running again it trips out real fast.<<
This sounds l
On 6/2/2012 2:14 PM, Dave wrote:
> Unfortunately if he buys a transformer it still might not work. That
> is why I would try and borrow one before opening my wallet for $1400.
I hope to borrow one before dumping more cash into this machine, as
stiff as the phase converter is not I'm wondering
Currently with the 10hp idler and the Samson lathe running as a second
idler and the 611 in the BP 308 on I have the voltage balanced at 245
between all three phases give or take one volt. The VMC will make parts
and run at 2k with full rapid speeds or ramp up with G code to 6k and
run about an
Yep, that about covers it. ;-)
Mark
On 6/2/2012 7:54 AM, Stuart Stevenson wrote:
> Heh!
> Wife = transformer?
> Power = money?
>
> Sent from my iPad
>
> On Jun 2, 2012, at 6:14 AM, "Mark Wendt
> (Contractor)" wrote:
>
>
>> On 6/2/2012 6:35 AM, John Thornton wrote:
>>
>>> After some c
On 6/2/2012 12:41 PM, gene heskett wrote:
> On Saturday, June 02, 2012 11:40:14 AM Dave did opine:
>
>
>> On 6/1/2012 6:52 PM, gene heskett wrote:
>>
>>> On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
>>>
I posted on the C(ommerical)NCZone and a guy there says
gene heskett wrote:
>
>
> Well, at some point it should become a discussion where the cost of
> switching the drives out for something that can tolerate a softer regulated
> power supply source is becoming one possible solution.
Well, this seems premature. This machine ALMOST works. I have not
On Saturday, June 02, 2012 11:40:14 AM Dave did opine:
> On 6/1/2012 6:52 PM, gene heskett wrote:
> > On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
> >> I posted on the C(ommerical)NCZone and a guy there says those drives
> >> are rated for a 3% inductance wye isolation transformer
>>This drive wants balanced voltage and wants an unlimited supply of it now!<<
Ha ha ... yep.
The 611 is a high performance drive system.
For comparison sakes, lets compare the 611 drive system to a hot
motorcycle engine that has an 11.5:1 compression ratio.
You bought the motorcycle as it is
On 6/1/2012 6:52 PM, gene heskett wrote:
> On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
>
>
>> I posted on the C(ommerical)NCZone and a guy there says those drives are
>> rated for a 3% inductance wye isolation transformer.
>>
>> John
>>
>>
> BS alert there John. 3% of wh
Heh!
Wife = transformer?
Power = money?
Sent from my iPad
On Jun 2, 2012, at 6:14 AM, "Mark Wendt (Contractor)"
wrote:
> On 6/2/2012 6:35 AM, John Thornton wrote:
>> After some checking most transformers show the percent of inductance on
>> the label. Some are 2.5% some are 4.~%. Basically the
A late reply, due to a week spent out on the farm, making sawdust
instead of swarf, and dodging a wombat who's taken up residence in the
home paddock. (He doesn't understand that he's supposed to be nocturnal,
not strolling about in the middle of the afternoon in bright sunlight.)
On 25.05.12 06:0
On Saturday, June 02, 2012 06:55:30 AM John Thornton did opine:
> I just pulled that feed rate out of my ear, assuming if you actually
> tried to cut you would replace it with a feed rate that worked for you.
>
> John
The 45 I made had very poor quadrature, but the bits I ordered from MCT
arriv
On 6/2/2012 6:35 AM, John Thornton wrote:
> After some checking most transformers show the percent of inductance on
> the label. Some are 2.5% some are 4.~%. Basically the 611 drive is a
> poorly designed drive as the power requirements are very strict. This
> drive wants balanced voltage and wants
After some checking most transformers show the percent of inductance on
the label. Some are 2.5% some are 4.~%. Basically the 611 drive is a
poorly designed drive as the power requirements are very strict. This
drive wants balanced voltage and wants an unlimited supply of it now!
John
On 6/1/2
I just pulled that feed rate out of my ear, assuming if you actually
tried to cut you would replace it with a feed rate that worked for you.
John
On 6/1/2012 5:44 PM, gene heskett wrote:
> John T.: I did a short pass with your code, cutting 2 slots. Feed way too
> fast, the slots were badly S
On 29.05.12 06:57, John Thornton wrote:
> There is no N connection on the transformer so I remain confused as well
> and I'm on my second cup of joe. I didn't measure the 390v to ground but
> I assume one leg is pretty high, but I can wander out and measure it
> easy enough.
It is 40 years sinc
On Saturday, June 02, 2012 12:22:59 AM Jon Elson did opine:
> gene heskett wrote:
> > On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
> >> I posted on the C(ommerical)NCZone and a guy there says those drives
> >> are rated for a 3% inductance wye isolation transformer.
> >>
> >> Joh
gene heskett wrote:
> On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
>
>
>> I posted on the C(ommerical)NCZone and a guy there says those drives are
>> rated for a 3% inductance wye isolation transformer.
>>
>> John
>>
> BS alert there John. 3% of what? Without a frame of re
On Fri, 1 Jun 2012 19:04:23 -0400
gene heskett wrote:
> On Friday, June 01, 2012 07:03:18 PM andy pugh did opine:
>
> > On 1 June 2012 23:44, gene heskett wrote:
> > > I personally have not had that great an experience at getting
> > > superglue to let go with acetone.
> >
> > I glued in my en
On Friday, June 01, 2012 07:03:18 PM andy pugh did opine:
> On 1 June 2012 23:44, gene heskett wrote:
> > I personally have not had that great an experience at getting
> > superglue to let go with acetone.
>
> I glued in my encoder disc (see earlier picture) then found I needed
> it out again.
>
On Friday, June 01, 2012 07:00:33 PM Joseph Chiu did opine:
> Hi,
> I'm a complete newb on this particular topic, and may not have read
> all the fine details, but it seems like this might be something better
> suited to photoresist/chemical etching, rather than using bits to try
> to mill out the
On Friday, June 01, 2012 06:50:05 PM John Thornton did opine:
> I posted on the C(ommerical)NCZone and a guy there says those drives are
> rated for a 3% inductance wye isolation transformer.
>
> John
>
BS alert there John. 3% of what? Without a frame of reference you may as
well be shopping f
On Fri, 1 Jun 2012 13:19:24 -0700
Joseph Chiu wrote:
> Hi,
> I'm a complete newb on this particular topic, and may not have read
> all the fine details, but it seems like this might be something better
> suited to photoresist/chemical etching, rather than using bits to try
> to mill out the inter
On 1 June 2012 23:44, gene heskett wrote:
> I personally have not had that great an experience at getting superglue to
> let go with acetone.
I glued in my encoder disc (see earlier picture) then found I needed
it out again.
Luckily heating to 200C released it, with no damage. And that was only
On Friday, June 01, 2012 06:18:41 PM Greg Bernard did opine:
> Gene-
> You could hold your stock down easily with super glue and then use
> acetone to release it like this:
> http://millpcbs.com/index.php?option=com_content&view=article&id=19&Ite
> mid=63 .
I personally have not had that great an
On 1 June 2012 21:19, Joseph Chiu wrote:
> I'm a complete newb on this particular topic, and may not have read
> all the fine details, but it seems like this might be something better
> suited to photoresist/chemical etching, rather than using bits to try
> to mill out the interruptor disks? Or
Hi,
I'm a complete newb on this particular topic, and may not have read
all the fine details, but it seems like this might be something better
suited to photoresist/chemical etching, rather than using bits to try
to mill out the interruptor disks? Or perhaps laser cut sheets, like
the kinds used f
I posted on the C(ommerical)NCZone and a guy there says those drives are
rated for a 3% inductance wye isolation transformer.
John
On 5/31/2012 3:20 PM, Dave wrote:
> They really don't have to be, but they should probably both be larger
> than 10 KVA. If you have one that was 30 KVA and another
n out before we tackle that. -Thomas Edison, inventor (1847-1931)
>
> From: gene heskett
>To: emc-users@lists.sourceforge.net
>Sent: Friday, June 1, 2012 7:28 AM
>Subject: Re: [Emc-users] Commutating Reactor
>
>On Friday, June 01, 2012 07:20:37
On Friday, June 01, 2012 08:59:21 AM John Thornton did opine:
> On 6/1/2012 7:28 AM, gene heskett wrote:
> > On Friday, June 01, 2012 07:20:37 AM John Thornton did opine:
> >> No wonder that file takes so long it makes one pass at the OD
> >>
> > :) To check fixture clearances.
> > :
> >> then
>
On Friday, June 01, 2012 08:50:05 AM John Thornton did opine:
> Gene,
>
> I used debug to capture the path of the first slot and put it into my
> subroutine. Run the following in sim and see what you think. Even at F2
> and 0.001" DOC one slot only takes a smidgen over 2 minutes to cut in my
> si
On 6/1/2012 7:28 AM, gene heskett wrote:
> On Friday, June 01, 2012 07:20:37 AM John Thornton did opine:
>
>> No wonder that file takes so long it makes one pass at the OD
> :) To check fixture clearances.
>
>> then
>> rapids to a slot makes one pass then rapids to the next slot... then
>> rapids
On Friday, June 01, 2012 07:20:37 AM John Thornton did opine:
> No wonder that file takes so long it makes one pass at the OD
:) To check fixture clearances.
> then
> rapids to a slot makes one pass then rapids to the next slot... then
> rapids to the holes then rapids to the ID. And wow is it c
Gene,
I used debug to capture the path of the first slot and put it into my
subroutine. Run the following in sim and see what you think. Even at F2
and 0.001" DOC one slot only takes a smidgen over 2 minutes to cut in my
sim.
F2
T1 M6 G43
# = -0.025
# = 0.001
G0 X1.1 Y0 Z0.05
# = 0
G10 L2 P1
That is some interesting code for sure and I can understand why it takes
so long making one pass over the whole thing with a tiny bit and lots of
rapid moves. It would be better from a machining view to do the OD and
ID with a larger endmill and drill the mounting holes then switch to the
tiny
No wonder that file takes so long it makes one pass at the OD then
rapids to a slot makes one pass then rapids to the next slot... then
rapids to the holes then rapids to the ID. And wow is it complicated and
full of neat code. It would make much more sense from a machining view
point to cut ea
On Thursday, May 31, 2012 11:29:49 PM John Thornton did opine:
> Are you tapering the slots so the edges are perpendicular to the center?
That was I believe the general idea, John.
I have the next one about 1/3rd done, but the run time is nearly 4 hours as
I had to slow it because I could see t
On Thursday, May 31, 2012 11:27:21 PM John Thornton did opine:
> I might be able to scrounge another 240-480 transformer and put it with
> the one I have to get back to 240... do you think they need to be
> similar in size?
>
Only to the extent that the smaller one is big enough, John.
[...]
C
They really don't have to be, but they should probably both be larger
than 10 KVA. If you have one that was 30 KVA and another that was
10KVA, I wouldn't hesitate to hook them together for a test.
Although if you can trip out your 611 with only the spindle running and
ramping up slowly, even
I'm not sure what the drives are as they are all in one modular unit and
have interconnecting communications between the infeed unit and all the
drives. My local voltage is 240 on the mains with 120 to neutral. I've
not seen any inverters designed to take single phase in larger than 3hp,
I have
Not too long ago I replaced every cap in the infeed unit, so I know they
are all fresh.
John
On 5/31/2012 12:27 PM, Jon Elson wrote:
> John Thornton wrote:
>> The interesting
>> thing that I discovered is if I start up the Samson lathe with the 611
>> on I get a fault and have to reset the dri
Well that and for fun too... but I do have a backlog of money to make...
John
On 5/31/2012 11:56 AM, gene heskett wrote:
> On Thursday, May 31, 2012 12:53:37 PM John Thornton did opine:
>
>> A little update this morning after last night's experiments I built on
>> that a bit this morning. I upped
Are you tapering the slots so the edges are perpendicular to the center?
BTW, 60 slots with the subroutine is a piece of cake. If you can come up
with the code to do one slot I can paste it in my subroutine and send it
back.
John
On 5/31/2012 11:46 AM, gene heskett wrote:
> On Thursday, May 31
I might be able to scrounge another 240-480 transformer and put it with
the one I have to get back to 240... do you think they need to be
similar in size?
John
On 5/31/2012 11:28 AM, Dave wrote:
> Looks to me like it is more like a $1264 question. ;-)
>
> I don't know. That's why I would try
On 5/31/2012 1:33 PM, Jon Elson wrote:
> John Thornton wrote:
>
>> $64 question will the isolation transformer do the same thing the 7.5hp
>> spindle motor is doing on the Samson?
>>
>>
> No, I do not think so. You may be able to tune this better with caps so
> the generated leg
> runs a
Are the servo drives 3-phase as well? If not it may be cheaper to
replace the spindle drive with one that is a bit less touchy. My
Colchester Triumph 2000 CNC lathe has an inverter designed to run off
415V 3-ph. I use a step-up transformer to take my 230V single phase
mains up to 415V single ph
John Thornton wrote:
> $64 question will the isolation transformer do the same thing the 7.5hp
> spindle motor is doing on the Samson?
>
No, I do not think so. You may be able to tune this better with caps so
the generated leg
runs a bit high at no load, and sags less at high load, and that m
John Thornton wrote:
> The interesting
> thing that I discovered is if I start up the Samson lathe with the 611
> on I get a fault and have to reset the drive. This leads my tiny brain
> to think that it is a voltage drop to some degree that is tripping out
> the 611... what do you guys think?
John Thornton wrote:
> RPC only running AB=245 BC=253 AC=253
> With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245
> With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=232
> Adding the 308's spindle at 1000 RPM AB=244 BC=234 AC=229
> Ramping up to 3000 RPM on the 308's spin
On Thursday, May 31, 2012 12:53:37 PM John Thornton did opine:
> A little update this morning after last night's experiments I built on
> that a bit this morning. I upped the MFD's on the B-C and A-C caps a
> little at a time till I got close to what I think I wanted in voltage.
> This is what I e
On Thursday, May 31, 2012 11:28:24 AM John Thornton did opine:
> I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC
> motor. I might pull it apart today and order some new ones...
>
> I didn't measure the temperature of the 10hp and only ran a few minutes
> but I'll keep an e
Looks to me like it is more like a $1264 question. ;-)
I don't know. That's why I would try and borrow one first.
Know of any plants where you do work that has a spare transformer lying
around?
I've put a couple of them together before to get the right voltage.. IE
240 to 480 and then 480
>> ---Original Message---
>> From: Dave
>> To: emc-users@lists.sourceforge.net
>> Subject: Re: [Emc-users] Commutating Reactor
>> Sent: May 31 '12 09:43
>>
>> You are probably right. When the drive load surges it is likely faulting
&g
I just ran another program to drill and tap a slew of holes in a 1/2"
steel plate with no problems except for I picked the 5/16-18 tap and
drill for the 1/4-20 holes and proceeded to tap all 8 of them at the 20
TPI pitch... no biggie I'll tap them out to 3/8 and plug them and tap
them over agai
I've caused my 10hp to "grunt" with a big load and it appears to slow
down then get back up to speed. I've drawn my 3hp RPC down so far the
potential relay kicked the start caps back in... it was at that point I
knew I could not run my Enco in high speed from the 3hp RPC. The 15hp
has a sizable
On Thu, 2012-05-31 at 10:08 -0500, ceen...@in-front.com wrote:
... snip
> I have not found that the rotary phase converter slows in RPM during
> high low demands as it is still an asynchronous AC motor ...
... snip
It's the velocity variation during a revolution that comes into play,
although I ha
ginal Message---
> From: Dave
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Commutating Reactor
> Sent: May 31 '12 09:43
>
> You are probably right. When the drive load surges it is likely faulting
> out on what it thinks is a lost phase or
You are probably right. When the drive load surges it is likely faulting
out on what it thinks is a lost phase or phase undervoltage.
It might be interesting is to run this test again and put a clamp on
ammeter on each leg feeding your Mill and see how balanced the currents
are.
I have never r
A little update this morning after last night's experiments I built on
that a bit this morning. I upped the MFD's on the B-C and A-C caps a
little at a time till I got close to what I think I wanted in voltage.
This is what I ended up with...
Phase ===> A-BB-CA-C
Caps
: John Thornton
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Commutating Reactor
> Sent: May 31 '12 07:51
>
> I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC
> motor. I might pull it a
I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC
motor. I might pull it apart today and order some new ones...
I didn't measure the temperature of the 10hp and only ran a few minutes
but I'll keep an eye on it.
I didn't ask for taps on the transformer but it won't hurt to
On Thursday, May 31, 2012 07:34:36 AM John Thornton did opine:
> Interestingly I had a bit of time last night and did some more voltage
> measurements with various bits turned on to load the RPC.
>
> RPC only running AB=245 BC=253 AC=253
> With the BP 308 (Simodrive 611) powered up AB=245 BC=245
Interestingly I had a bit of time last night and did some more voltage
measurements with various bits turned on to load the RPC.
RPC only running AB=245 BC=253 AC=253
With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245
With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=23
As an electrician I would agree with you normally. When you leave the
world of power distribution and enter the world of electronics the
"rules" might change. In any case I know Andy was just pulling my leg.
John
On 5/30/2012 8:29 PM, fritz wrote:
> On 05/29/2012 12:07 PM, andy pugh wrote:
>> O
That's a good idea, I don't hang out at the Zone any more but it's worth
a shot.
John
On 5/30/2012 9:02 PM, Jon Elson wrote:
> John Thornton wrote:
>>From the tone of the tech's voice he hears this problem a lot with 611
>> drive and rotary phase converters.
>>
>>
> Well, have you checked on
On 31 May 2012 02:29, fritz wrote:
> As an electrician, I should now interject that a neutral should only be
> bonded at the point of distribution (the breaker panel or upstream
> transformer).
The point we are discussing grounding is equivalent to the transformer
you mention, I think.
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