On Thursday 18 June 2015 19:32:34 MC Cason wrote:
> Gene,
>
>I just did a teardown of my HF 12x36, and replaced the spindle
> bearings. What I found sickening, was that there was NO oiler hole
> for the rear bearing, and the front bearing's oiler hole was drilled
> to the wrong side of the bea
On 19 June 2015 at 00:32, MC Cason wrote:
> I just did a teardown of my HF 12x36, and replaced the spindle
> bearings. What I found sickening, was that there was NO oiler hole for
> the rear bearing, and the front bearing's oiler hole was drilled to the
> wrong side of the bearing,
My 9x20 lath
Gene,
I just did a teardown of my HF 12x36, and replaced the spindle
bearings. What I found sickening, was that there was NO oiler hole for
the rear bearing, and the front bearing's oiler hole was drilled to the
wrong side of the bearing, and was mostly covered by the bearing cup.
I upl
On 15 June 2015 at 17:44, Gene Heskett wrote:
>> It is possible to bore a taper on a CNC milling machine but you need a
>> boring and facing head.
>
> Why? Is it not possible to write a G2 or G3 that in addition to spiraling
> down, tapers as it spirals?
You need a facing head to bore the hole. B
On Monday 15 June 2015 12:44:08 Gene Heskett wrote:
> On Monday 15 June 2015 06:35:17 andy pugh wrote:
> > On 15 June 2015 at 03:05, Gene Heskett wrote:
> > > There is not room on the spindle for a taperlock,
> >
> > My servo motors have a tapped hole in the end of the spindle, and I
> > used th
On Monday 15 June 2015 06:35:17 andy pugh wrote:
> On 15 June 2015 at 03:05, Gene Heskett wrote:
> > There is not room on the spindle for a taperlock,
>
> My servo motors have a tapped hole in the end of the spindle, and I
> used this to make my own taperlock.
> I bored out the pulley with a tap
On 15 June 2015 at 03:05, Gene Heskett wrote:
> There is not room on the spindle for a taperlock,
My servo motors have a tapped hole in the end of the spindle, and I
used this to make my own taperlock.
I bored out the pulley with a tapered bore (on my lathe, which might
be a bit of a catch-22 for
On Sunday 14 June 2015 21:03:40 Dave Cole wrote:
> Squirrel cage motors driven by VFDs slip. The motors have to slip to
> magnetize the rotor. If you want tight control of a Squirrel cage
> motor (as tight as possible) they put a encoder on the motor then run
> the motor in vector control mode
Gene,
I don't think the torque falls that quickly with a V/Hz VFD. There are
some curves in the pdf below.
https://www.google.com/url?sa=t&source=web&rct=j&url=http://literature.rockwellautomation.com/idc/groups/literature/documents/wp/drives-wp002_-en-p.pdf&ved=0CC8QFjAFahUKEwjo7qHsxJDGAhUGWJIK
Squirrel cage motors driven by VFDs slip. The motors have to slip to
magnetize the rotor. If you want tight control of a Squirrel cage
motor (as tight as possible) they put a encoder on the motor then run
the motor in vector control mode, where the slip is compensated for by
the drive. But
On Sunday 14 June 2015 17:32:07 andy pugh wrote:
> On 14 June 2015 at 17:14, Gene Heskett wrote:
> > So how do we discern the induction motor,totally unsuitable for vfd
> > drive except near is design rpms, from the synchronous motor at home
> > on a vfd drive?
>
> I think there is a false assumpt
On 14 June 2015 at 17:14, Gene Heskett wrote:
> So how do we discern the induction motor,totally unsuitable for vfd drive
> except near is design rpms, from the synchronous motor at home on a vfd
> drive?
I think there is a false assumption here. VFDs are _intended_ for
driving induction motors.
On 14 June 2015 at 12:55, Steve Stallings wrote:
> Andy, that is a nice looking setup. I see what I think
> is a rotary joint in the head block. Is that factory
> or shop made?
It's home-made (on the machine itself). It was required for the hobbing setup.
> Is it essential to the clearance neede
Here are some new Nema 48's from Baldor.
http://www.electricmotorwholesale.com/BALDOR-MOTORS-3PH-DP.html
Here is Siemens standard motor catalog - if you look at page 2/10 you
can get an idea of the IEC/Metric frame sizes and relative power outputs.
http://www.motology.co.th/download/motors/%282%2
On Sunday 14 June 2015 10:54:57 Dave Cole wrote:
> Gene,
>
> Try looking for a Nema 48 AC motor. They are almost an inch smaller
> in diameter.
That makes perfect sense. But no search hits until I drop it to Nema 42.
> Also, there are some metric frame motors that are common in Europe
> that a
Gene,
Try looking for a Nema 48 AC motor. They are almost an inch smaller in
diameter.
Also, there are some metric frame motors that are common in Europe that
are also smaller in diameter than a Nema 56.
http://kurz.com/wp-content/uploads/2014/09/Baldor-NEMA-Frame-Chart.pdf
http://www.engine
On Sunday 14 June 2015 09:49:33 Kirk Wallace wrote:
> On 06/14/2015 04:48 AM, Steve Stallings wrote:
> >> -Original Message-
> >> From: Gregg Eshelman [mailto:g_ala...@yahoo.com]
> >> Sent: Sunday, June 14, 2015 4:12 AM
> >
> >
> >
> >> If it has a 240 option on both primary and secondar
On Sunday 14 June 2015 05:06:22 andy pugh wrote:
> On 14 June 2015 at 02:38, Gene Heskett wrote:
> > It does look good, but where can I get an adaptor to mount that 56C
> > frame on the GO704? Or is that my first project, making one? ;-)
>
> What is the existing motor mount?
About an inch smal
On Sunday 14 June 2015 05:06:22 andy pugh wrote:
> On 14 June 2015 at 02:38, Gene Heskett wrote:
> > It does look good, but where can I get an adaptor to mount that 56C
> > frame on the GO704? Or is that my first project, making one? ;-)
>
> What is the existing motor mount?
> I adapted my Mini
On 06/14/2015 04:48 AM, Steve Stallings wrote:
>> -Original Message-
>> From: Gregg Eshelman [mailto:g_ala...@yahoo.com]
>> Sent: Sunday, June 14, 2015 4:12 AM
>
>>
>> If it has a 240 option on both primary and secondary, would not using
>> the 240 taps on both make it a 1:1 so putting 120
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: Sunday, June 14, 2015 5:06 AM
>
> What is the existing motor mount?
> I adapted my Mini-Mill to a standard 3-phase motor:
> https://picasaweb.google.com/lh/photo/Dk3wsS9o7XJ-N2kfUnESDtMT
> jNZETYmyPJy0liipFm0?feat
> -Original Message-
> From: Gregg Eshelman [mailto:g_ala...@yahoo.com]
> Sent: Sunday, June 14, 2015 4:12 AM
>
> If it has a 240 option on both primary and secondary, would not using
> the 240 taps on both make it a 1:1 so putting 120 in would
> get 120 out?
>
>
Yes the voltage rat
On 14 June 2015 at 02:38, Gene Heskett wrote:
> It does look good, but where can I get an adaptor to mount that 56C frame
> on the GO704? Or is that my first project, making one? ;-)
What is the existing motor mount?
I adapted my Mini-Mill to a standard 3-phase motor:
https://picasaweb.google.c
On 6/13/2015 8:53 AM, Jon Elson wrote:
>
> There are, however, "step down" transformers. These usually have split
> primary and secondary windings, so you can configure them for 240 or 480
> V on the primary, and 240 or 120 on the secondary. If you can tolerate
> running it at half voltage, set p
- Original Message -
From: Steve Stallings
To: 'Greg Bentzinger' ; 'Enhanced Machine Controller
(EMC)'
Cc:
Sent: Saturday, June 13, 2015 6:10 PM
Subject: RE: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)
> -Original Message-
On Saturday 13 June 2015 21:49:38 Ken Strauss wrote:
> I have placed one order with them without a problem; the supplied
> motor was exactly as advertised. Unfortunately it was not what I
> needed! Note to self: "Learn to read!"
BTDT Ken, had to chuckle at myself later. After I got done chewing m
5 9:06 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Suitable transformers = hens teeth
>
> On Saturday 13 June 2015 18:04:14 jeremy youngs wrote:
> > Surplus sales of Nebraska
>
> I have dealt with them before and that has made me a bit gunshy.
>
On Saturday 13 June 2015 20:10:20 Steve Stallings wrote:
> > -Original Message-
> > From: Greg Bentzinger [mailto:skullwo...@yahoo.com]
> > Sent: Saturday, June 13, 2015 7:31 PM
>
>
>
> > -- ^ ^ ^ ^ ^ ^ No idea where you came up with this - never
> > said anything about water cooling or
On Saturday 13 June 2015 19:31:20 Greg Bentzinger wrote:
> Replies inline
>
>
> Quoting - Message: 7Date: Sat, 13 Jun 2015 14:42:37 -0400
> From: Gene Heskett
> Subject: Re: [Emc-users] was Suitable transformers = hens teeth
> To: emc-users@lists.sourceforge.net
> Message-ID: <201506131442.37277.
On Saturday 13 June 2015 18:04:14 jeremy youngs wrote:
> Surplus sales of Nebraska
I have dealt with them before and that has made me a bit gunshy.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howder
On Saturday 13 June 2015 05:32:34 andy pugh wrote:
> On 13 June 2015 at 00:09, Gene Heskett wrote:
> > But 1kw and up isolation cans are both scarce, and north of a $100
> > bill pricy at least on fleabay.
>
> eBay UK is awash with "site transformers" such as this
> http://www.ebay.com/itm/Briti
> -Original Message-
> From: Greg Bentzinger [mailto:skullwo...@yahoo.com]
> Sent: Saturday, June 13, 2015 7:31 PM
>
> -- ^ ^ ^ ^ ^ ^ No idea where you came up with this - never
> said anything about water cooling or trying to use a 24K
> router type spindle.
>
> I actually said a LOW
Replies inline
Quoting - Message: 7Date: Sat, 13 Jun 2015 14:42:37 -0400
From: Gene Heskett
Subject: Re: [Emc-users] was Suitable transformers = hens teeth
To: emc-users@lists.sourceforge.net
Message-ID: <201506131442.37277.ghesk...@wdtv.com>
Content-Type: Text/Plain; charset="iso-8859-1"
On
Surplus sales of Nebraska
--
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
On Saturday 13 June 2015 10:49:18 Jon Elson wrote:
> On 06/13/2015 04:32 AM, andy pugh wrote:
> > On 13 June 2015 at 00:09, Gene Heskett wrote:
> >> But 1kw and up isolation cans are both scarce, and north of a $100
> >> bill pricy at least on fleabay.
> >
> > eBay UK is awash with "site transfo
On Saturday 13 June 2015 10:46:42 Jon Elson wrote:
> On 06/12/2015 10:02 PM, Gene Heskett wrote:
> > I am well aware of that lack of a Santa Jack, but we're talking
> > about a couple kilowatts worth of iron & copper to have a CCS rated
> > setup. I don't mind paying some north of a $150 bill, bu
Sent: Saturday, June 13, 2015 10:53 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Suitable transformers = hens teeth
> >
> >
> > There are, however, "step down" transformers. These usually have
> > split primary and second
Aren't these often auto-transformers which provide no isolation between
input and output?
> -Original Message-
> From: Jon Elson [mailto:jonelson...@gmail.com]
> Sent: Saturday, June 13, 2015 10:53 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] S
Gene;
We really need to break your DC motor fixation. If you think PCW's 5i25 is neat
just wait until you start using a VFD controlled spindle.
Odds are that a better replacement motor and VFD will cost near the same of
what your planning to build to support that marginal OEM DC motor.
I have
There are, however, "step down" transformers. These usually have split
primary and secondary windings, so you can configure them for 240 or 480
V on the primary, and 240 or 120 on the secondary. If you can tolerate
running it at half voltage, set primary for 240 V and supply 120, and
then yo
On 06/13/2015 04:32 AM, andy pugh wrote:
> On 13 June 2015 at 00:09, Gene Heskett wrote:
>> But 1kw and up isolation cans are both scarce, and north of a $100 bill
>> pricy at least on fleabay.
> eBay UK is awash with "site transformers" such as this
> http://www.ebay.com/itm/British-Made-Caroll-
On 06/12/2015 10:02 PM, Gene Heskett wrote:
> I am well aware of that lack of a Santa Jack, but we're talking about
> a couple kilowatts worth of iron & copper to have a CCS rated setup. I
> don't mind paying some north of a $150 bill, but even at that, the
> selection on fleabay is limited, or
On 13 June 2015 at 00:09, Gene Heskett wrote:
> But 1kw and up isolation cans are both scarce, and north of a $100 bill
> pricy at least on fleabay.
eBay UK is awash with "site transformers" such as this
http://www.ebay.com/itm/British-Made-Caroll-Meynell-3-3kva-site-transformer-/121656911146
Th
On Friday 12 June 2015 23:22:49 Chris Radek wrote:
> On Fri, Jun 12, 2015 at 07:09:26PM -0400, Gene Heskett wrote:
> > But 1kw and up isolation cans are both scarce, and north of a $100
> > bill pricy at least on fleabay.
>
> Check hgr, for example:
>
> http://www.hgrinc.com/productDetail/Electrica
On Friday 12 June 2015 23:02:32 Gene Heskett wrote:
> On Friday 12 June 2015 22:06:16 Jack Coats wrote:
> > Yes Gene, there is no santa clause, especially when you are talking
> > about copper. Just as a raw material it is pretty pricy.
> >
> > In the past I just got a couple of matched transforme
On Fri, Jun 12, 2015 at 07:09:26PM -0400, Gene Heskett wrote:
>
> But 1kw and up isolation cans are both scarce, and north of a $100 bill
> pricy at least on fleabay.
Check hgr, for example:
http://www.hgrinc.com/productDetail/Electrical/USED-EGS-TRANSFORMER/02150100059
I think it says PRIMARY
On Friday 12 June 2015 22:06:16 Jack Coats wrote:
> Yes Gene, there is no santa clause, especially when you are talking
> about copper. Just as a raw material it is pretty pricy.
>
> In the past I just got a couple of matched transformers 120VAC to
> whatever, and put the secondaries together.
> I
Yes Gene, there is no santa clause, especially when you are talking
about copper. Just as a raw material it is pretty pricy.
In the past I just got a couple of matched transformers 120VAC to whatever,
and put the secondaries together.
It makes a good isolation transformer when set up back to back
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