Re: [Emc-users] pressure equalizer method around ball nut

2016-10-09 Thread Peter Blodow
If you ever tried to spot-weld two alu sheets, the welder developing about 1 volt, it will show you that it is a question of voltage to break through the oxide layer. After tat, you have conductivity. In order to spot weld, scratch the surfaces hard with a rotating steel brush, after that you

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-08 Thread Gene Heskett
On Saturday 08 October 2016 15:51:30 Gene Heskett wrote: Update, having fixed the funkity cable. I went to work on my holefinder.ngc code, and it is now giving me plus or minus .0001 repeatable results. I can live with that. :) Now, if I can get the sim version of lcnc to reload the mill

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-08 Thread Gene Heskett
On Friday 07 October 2016 19:05:56 Gene Heskett wrote: > Greetings to PCW; > > I have a 2nd apparent failure of a 5i25, affecting the same p3-15 pin. > So I am suspecting I have a bad BoB or home rolled cable. > > I have a perfectly good 4.77 volts at the BoB's input, which does go > to ground if

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-08 Thread Gene Heskett
n to the all electrical solution and some gcode to do that as its free of any $ expenditure. :) > > > From: Gene Heskett <ghesk...@shentel.net> > To: emc-users@lists.sourceforge.net > Sent: Friday, October 7, 2016 8:47 AM > Subject: Re: [Emc-users] pressure equalizer

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-08 Thread Gene Heskett
urceforge.net > Sent: Friday, October 7, 2016 7:33 AM > Subject: Re: [Emc-users] pressure equalizer method around ball nut > > Film at 11, but day unknown. :) When I get the other two thru holes > bored, I think next is an insulated probe so I can find the exact > center of the

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gregg Eshelman
, plugins and light switches began to set houses on fire. From: Dave Cole <linuxcncro...@gmail.com> To: emc-users@lists.sourceforge.net Sent: Friday, October 7, 2016 10:09 AM Subject: Re: [Emc-users] pressure equalizer method around ball nut Next question;  Why do aluminum elec

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gregg Eshelman
: [Emc-users] pressure equalizer method around ball nut On Friday 07 October 2016 09:46:22 andy pugh wrote: > You could consider using one of these instead of a probe: > http://www.ebay.com/itm/CO-AX-INDICATOR-MILLING-MACHINE-COAXIAL-COAX-0 >005-/300841418164 I've not figured out h

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gregg Eshelman
Or you could get a coaxial indicator like this.http://www.ebay.com/itm/262647994320 From: Gene Heskett <ghesk...@shentel.net> To: emc-users@lists.sourceforge.net Sent: Friday, October 7, 2016 7:33 AM Subject: Re: [Emc-users] pressure equalizer method around ball nut Film

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
Greetings to PCW; I have a 2nd apparent failure of a 5i25, affecting the same p3-15 pin. So I am suspecting I have a bad BoB or home rolled cable. I have a perfectly good 4.77 volts at the BoB's input, which does go to ground if I touch the wire to the machine frame, but it is not getting

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread andy pugh
On 7 October 2016 at 20:55, Przemek Klosowski wrote: > If the alumina layer is thickened (e.g. by anodization), the aluminum > objects will be isolated; I will also note the apparent conductivity of my anodized solder-sucker. But that is probably a think anodised

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Przemek Klosowski
On Fri, Oct 7, 2016 at 1:08 PM, andy pugh wrote: > On 7 October 2016 at 17:09, Dave Cole wrote: > > > > Does this give me a clue? > > https://www.researchgate.net/post/What_is_aluminium_and_ > its_oxide_electrical_properties2 > > It seems to be lots

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread andy pugh
On 7 October 2016 at 20:08, Gene Heskett wrote: > Force one probe to actually dent the surface so you know you are making a > connection WITH that probe. Then lay, or let gently swing to touch a > clean looking spot, the other probe, without using the point, or a sharp >

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
On Friday 07 October 2016 12:09:35 Dave Cole wrote: > On 10/7/2016 11:48 AM, andy pugh wrote: > > On 7 October 2016 at 15:47, Gene Heskett wrote: > >>> I have never found aluminium to be non-conductive. > >> > >> Its a good conductor, IF you can achieve a 'gas tight'

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
On Friday 07 October 2016 11:48:07 andy pugh wrote: > On 7 October 2016 at 15:47, Gene Heskett wrote: > >> I have never found aluminium to be non-conductive. > > > > Its a good conductor, IF you can achieve a 'gas tight' connection, > > AND maintain it for decades. > > No,

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread andy pugh
On 7 October 2016 at 17:09, Dave Cole wrote: > > Does this give me a clue? > https://www.researchgate.net/post/What_is_aluminium_and_its_oxide_electrical_properties2 It seems to be lots of people saying "Aluminium is non-conducting" without doing the simple test with a

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Dave Cole
On 10/7/2016 11:48 AM, andy pugh wrote: > On 7 October 2016 at 15:47, Gene Heskett wrote: >>> I have never found aluminium to be non-conductive. >>> >> Its a good conductor, IF you can achieve a 'gas tight' connection, AND >> maintain it for decades. > No, really. Get some

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread andy pugh
On 7 October 2016 at 15:47, Gene Heskett wrote: >> I have never found aluminium to be non-conductive. >> > Its a good conductor, IF you can achieve a 'gas tight' connection, AND > maintain it for decades. No, really. Get some aluminium and your multimeter. You will find

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
On Friday 07 October 2016 10:34:19 Roland Jollivet wrote: > On 6 October 2016 at 17:27, Gene Heskett wrote: > > On Thursday 06 October 2016 09:54:59 andy pugh wrote: > > > On 6 October 2016 at 12:32, Gene Heskett wrote: > > > > Anybody got a better

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
On Friday 07 October 2016 09:46:22 andy pugh wrote: > On 7 October 2016 at 14:33, Gene Heskett wrote: > > It all gets complex fast when dealing with alu and > > its instant oxidation. > > I have never found aluminium to be non-conductive. > Its a good conductor, IF you

[Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Roland Jollivet
On 6 October 2016 at 17:27, Gene Heskett wrote: > On Thursday 06 October 2016 09:54:59 andy pugh wrote: > > > On 6 October 2016 at 12:32, Gene Heskett wrote: > > > Anybody got a better idea than sacrificing two of the six bolt > > > positions to make

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread andy pugh
On 7 October 2016 at 14:33, Gene Heskett wrote: > It all gets complex fast when dealing with alu and > its instant oxidation. I have never found aluminium to be non-conductive. You could consider using one of these instead of a probe:

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-07 Thread Gene Heskett
On Thursday 06 October 2016 11:27:46 Gene Heskett wrote: > On Thursday 06 October 2016 09:54:59 andy pugh wrote: > > On 6 October 2016 at 12:32, Gene Heskett wrote: > > > Anybody got a better idea than sacrificing two of the six bolt > > > positions to make the coupling

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-06 Thread Gene Heskett
On Thursday 06 October 2016 22:20:36 Gregg Eshelman wrote: > On the steering racks Ford used on the Pinto and Mustang II, the big > ends of the bellows/boots had the ID off center with a vent hole for a > metal pipe (around 1/4" ID) to push in so that air could flow back and > forth as the rack

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-06 Thread Gregg Eshelman
On the steering racks Ford used on the Pinto and Mustang II, the big ends of the bellows/boots had the ID off center with a vent hole for a metal pipe (around 1/4" ID) to push in so that air could flow back and forth as the rack moved. Whatever you do, it shouldn't require a really large vent

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-06 Thread Gene Heskett
On Thursday 06 October 2016 09:54:59 andy pugh wrote: > On 6 October 2016 at 12:32, Gene Heskett wrote: > > Anybody got a better idea than sacrificing two of the six bolt > > positions to make the coupling vents? > > Tubular bolts? > > Oh, you said _better_ ideas? Or even

Re: [Emc-users] pressure equalizer method around ball nut

2016-10-06 Thread andy pugh
On 6 October 2016 at 12:32, Gene Heskett wrote: > Anybody got a better idea than sacrificing two of the six bolt positions > to make the coupling vents? Tubular bolts? Oh, you said _better_ ideas? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is

[Emc-users] pressure equalizer method around ball nut

2016-10-06 Thread Gene Heskett
Greetings all; I am about at that stage in this conversion where I am about to hang the Z screw. I have some bellows to serve as debris shields around the screw. So I'll need to make "nipples" to connect the bellows, at the support bearings and at the traveler nut mount. Alu rod enough for