Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Andy Pugh
> On 9 Sep 2016, at 17:08, Chris Albertson wrote: > > A good why to demonstrate this is to place an AC voltmeter into an AC > socket in a large building. Measure between Ground and Neutral and you > might see as much as 1.5 volts. Yes the ground and neutral are tried > together at the service

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Dave Cole
On 9/9/2016 2:08 PM, John Alexander Stewart wrote: I'm afraid the technical details are above my pay grade. I can however help you with Mesa cards that relate to Linuxcnc. >> > Just got the 5i25/7i76 plug and go kit from Mesaus.com, shipped to Canada > via USPS/Canada Post, and it all wor

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Gene Heskett
On Friday 09 September 2016 13:01:28 Sarah Armstrong wrote: > iv'e had ground differences between a machine and a pc > blow a breakout board , it transpired they were across 2 different > supplies, in the building , one 3 phase , one single > Nothing so complex here, in fact it is all plugged into

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread John Thornton
Glad to hear you got your shipment! Thanks for the order JT On 9/9/2016 1:08 PM, John Alexander Stewart wrote: I'm afraid the technical details are above my pay grade. I can however help you with Mesa cards that relate to Linuxcnc. >> > Just got the 5i25/7i76 plug and go kit from Mesaus

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread John Alexander Stewart
> >> I'm afraid the technical details are above my pay grade. I can however > >> help you with Mesa cards that relate to Linuxcnc. > > Just got the 5i25/7i76 plug and go kit from Mesaus.com, shipped to Canada via USPS/Canada Post, and it all worked flawlessly. As an aside - I really like the USPS

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Chris Albertson
No, I think you have it backwards. The problem is usually that you HAVE tied all those grounds together. In the audio world they call this a "ground loop".It should never be possible for you to trace a loop in your ground wiring. The only place I can think of where a logic level return pa

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Dave Cole
On 9/9/2016 12:06 PM, Gene Heskett wrote: > On Friday 09 September 2016 09:50:51 John Thornton wrote: > >> I have a full set of whatever the DIP chips are for the C1G. No, I'm >> just a self educated country boy... >> > FWIW, thats me too. I quit school in the middle of my freshman year of > high

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Sarah Armstrong
iv'e had ground differences between a machine and a pc blow a breakout board , it transpired they were across 2 different supplies, in the building , one 3 phase , one single On 9 September 2016 at 17:50, Gene Heskett wrote: > On Friday 09 September 2016 12:08:27 Chris Albertson wrote: > > > I

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Gene Heskett
On Friday 09 September 2016 12:08:27 Chris Albertson wrote: > It is hard to even guess the cause of this from your description. You > are just going to have to go down the line and test each part > independently. > > I remember reading here in this forum someone posting about > "redundant" onto i

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Chris Albertson
It is hard to even guess the cause of this from your description. You are just going to have to go down the line and test each part independently. I remember reading here in this forum someone posting about "redundant" onto isolators being on both the breakout board and the motor drivers. Maybe

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread Gene Heskett
On Friday 09 September 2016 09:50:51 John Thornton wrote: > I have a full set of whatever the DIP chips are for the C1G. No, I'm > just a self educated country boy... > FWIW, thats me too. I quit school in the middle of my freshman year of high school because of a medical problem that when finall

Re: [Emc-users] 5i25 failure?

2016-09-09 Thread John Thornton
I have a full set of whatever the DIP chips are for the C1G. No, I'm just a self educated country boy... http://cnc4pc.com/hardware/replacement-chips/c1g/set-of-buffers-and-optoisolators-for-the-c1g-board-rev-3.html says they are buffers and optoisolators. JT On 9/8/2016 8:34 PM, Gene Heskett

Re: [Emc-users] 5i25 failure?

2016-09-08 Thread Gene Heskett
On Thursday 08 September 2016 18:34:33 John Thornton wrote: > Hi Gene, > > I'm afraid the technical details are above my pay grade. I can however > help you with Mesa cards that relate to Linuxcnc. Aw, gee, John. Aren't you a C.E.T. too? ;-) > My 5i25 > http://mesaus.com/index.php?route=product/

Re: [Emc-users] 5i25 failure?

2016-09-08 Thread John Thornton
Hi Gene, I'm afraid the technical details are above my pay grade. I can however help you with Mesa cards that relate to Linuxcnc. My 5i25 http://mesaus.com/index.php?route=product/product&path=62&product_id=51 I also have a C1 and a C1G and a pile of optos for them I'd be very willing to part

[Emc-users] 5i25 failure?

2016-09-08 Thread Gene Heskett
Greetings Peter; Someone made the remark a while back that it was indeed possible to look at the output of a function, in this case the first pwmgen of a 5i25 with the prob-rfx2 firmware in it. I've had a blowup, the ultimate cause of which I have not found yet, but from the damages done to th