Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-18 Thread Gene Heskett
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 bearing,

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-18 Thread MC Cason
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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-18 Thread andy pugh
On 19 June 2015 at 00:32, MC Cason farmerboy1...@yahoo.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-15 Thread andy pugh
On 15 June 2015 at 17:44, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-15 Thread Gene Heskett
On Monday 15 June 2015 06:35:17 andy pugh wrote: On 15 June 2015 at 03:05, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-15 Thread Gene Heskett
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 ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-14 Thread Kirk Wallace
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 snip 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-14 Thread Steve Stallings
-Original Message- From: Gregg Eshelman [mailto:g_ala...@yahoo.com] Sent: Sunday, June 14, 2015 4:12 AM snip 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 ration

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Steve Stallings
-Original Message- From: andy pugh [mailto:bodge...@gmail.com] Sent: Sunday, June 14, 2015 5:06 AM snip 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Gene Heskett
On Sunday 14 June 2015 05:06:22 andy pugh wrote: On 14 June 2015 at 02:38, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Gene Heskett
On Sunday 14 June 2015 05:06:22 andy pugh wrote: On 14 June 2015 at 02:38, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-14 Thread Gene Heskett
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 snip If it has a 240 option on both primary and secondary, would not

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-14 Thread Gregg Eshelman
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 primary

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread andy pugh
On 14 June 2015 at 02:38, Gene Heskett ghesk...@wdtv.com 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:

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Gene Heskett
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 are

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Dave Cole
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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Dave Cole
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.

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread andy pugh
On 14 June 2015 at 12:55, Steve Stallings steve...@newsguy.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread andy pugh
On 14 June 2015 at 17:14, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Gene Heskett
On Sunday 14 June 2015 17:32:07 andy pugh wrote: On 14 June 2015 at 17:14, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Dave Cole
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.

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread Gene Heskett
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,

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-14 Thread John Figie
Gene, I don't think the torque falls that quickly with a V/Hz VFD. There are some curves in the pdf below.

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-13 Thread Gene Heskett
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 snip -- ^ ^ ^ ^ ^ ^ No idea where you came up with this - never said anything about water cooling or trying

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
On Saturday 13 June 2015 05:32:34 andy pugh wrote: On 13 June 2015 at 00:09, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-13 Thread Gene Heskett
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 ghesk...@wdtv.com Subject: Re: [Emc-users] was Suitable transformers = hens teeth To: emc-users@lists.sourceforge.net Message-ID:

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
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 my

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-13 Thread Greg Bentzinger
Replies inline Quoting - Message: 7Date: Sat, 13 Jun 2015 14:42:37 -0400 From: Gene Heskett ghesk...@wdtv.com 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;

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-13 Thread Steve Stallings
-Original Message- From: Greg Bentzinger [mailto:skullwo...@yahoo.com] Sent: Saturday, June 13, 2015 7:31 PM snip -- ^ ^ ^ ^ ^ ^ 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 LOWER

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Ken Strauss
@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. Cheers, Gene Heskett -- There are four boxes to be used

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
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

Re: [Emc-users] Suitable transformers = hens teeth (Gene Heskett)

2015-06-13 Thread Greg Bentzinger
- Original Message - From: Steve Stallings steve...@newsguy.com To: 'Greg Bentzinger' skullwo...@yahoo.com; 'Enhanced Machine Controller (EMC)' emc-users@lists.sourceforge.net Cc: Sent: Saturday, June 13, 2015 6:10 PM Subject: RE: [Emc-users] Suitable transformers = hens teeth (Gene

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Jon Elson
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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Jon Elson
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 you

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Jon Elson
On 06/13/2015 04:32 AM, andy pugh wrote: On 13 June 2015 at 00:09, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Ken Strauss
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] Suitable transformers

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Greg Bentzinger
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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread andy pugh
On 13 June 2015 at 00:09, Gene Heskett ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
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 ghesk...@wdtv.com 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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
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 secondary windings, so you can configure them for 240 or 480 V on the primary, and 240 or 120

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread Gene Heskett
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, but even

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-13 Thread jeremy youngs
Surplus sales of Nebraska -- ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Gene Heskett
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. It

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Chris Radek
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

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Gene Heskett
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 transformers

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Gene Heskett
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:

[Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Gene Heskett
Hi all; In laying out how I am going to cnc this GO704, its apparent that the scr or triac board it comes with to control a motor of undetermined power, rated variously as 750 watts, 1kw, or needing 12 amps from the line. None of which groks, but welcome to chinese specs seems to be the

Re: [Emc-users] Suitable transformers = hens teeth

2015-06-12 Thread Jack Coats
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