On Wednesday 11 December 2019 01:20:49 Peter C. Wallace wrote:
> On Wed, 11 Dec 2019, Gene Heskett wrote:
> > Date: Wed, 11 Dec 2019 00:57:22 -0500
> > From: Gene Heskett
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: emc-users@lists.sourceforge.net
> > Subject: Re:
On Wed, 11 Dec 2019, Gene Heskett wrote:
Date: Wed, 11 Dec 2019 00:57:22 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Need a power signal independent of linuxcnc.
On Tuesday 10 December 2019 16:54:51
On Tuesday 10 December 2019 16:54:51 Todd Zuercher wrote:
> Gene says that he can't start Linuxcnc after the error occurs. Is
> there a possibility that there could be some kind of a config issue
> preventing Linuxcnc from properly initializing the cards on start up?
>
To head that off at the
Gene says that he can't start Linuxcnc after the error occurs. Is there a
possibility that there could be some kind of a config issue preventing Linuxcnc
from properly initializing the cards on start up?
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone:
4 wire computer fans work fine on a 3 wire header. They just run at a fixed
rate. Some may support variable speed via PWM-ing the power.
On Tuesday, December 10, 2019, 2:40:59 PM MST, Chris Albertson
wrote:
In the 3-wire fan, the tach is not PWM. It is a two-pulse per
revelation TTL
On Tuesday 10 December 2019 17:08:15 Andy Pugh wrote:
> On 10 Dec 2019, at 20:03, Gene Heskett wrote:
> >> 0.run on and off
> >
> > That would have to be w/o lcnc running since it won't run now
>
> The pins only exist with LinuxCNC running.
> It should (and does) restart smart serial without
On Tuesday 10 December 2019 16:27:50 Peter C. Wallace wrote:
> I did a quick test to see if I could confuse a 7I76 by sending it
> garbage/interrupted transmissions (cycling the FPGA side power while
> doing high speed comms. I did this 500 times without the 7i76 I/O
> processor ever requiring a
On Tuesday 10 December 2019 14:32:06 Chris Albertson wrote:
> With a 3-wire fan there are two power wires and the third is a
> tachometer. Fan speed is controlled by varying the volts (or duty
> cycle) on the power wires.
>
> With a 4-wire fan all thee above wires do the same thing but wire #4
>
On 10 Dec 2019, at 20:03, Gene Heskett wrote:
>> 0.run on and off
>>
>
> That would have to be w/o lcnc running since it won't run now
The pins only exist with LinuxCNC running.
It should (and does) restart smart serial without even having to reboot
linuxcnc.
In the 3-wire fan, the tach is not PWM. It is a two-pulse per
revelation TTL level signal.I actually build a fan controller once
using a "dead bug" 50 cent, 8-pin AVR microcontroller, and an external
transistor switch. So I had to look into this.
I think the real reason for the 4th wire is
I did a quick test to see if I could confuse a 7I76 by sending it
garbage/interrupted transmissions (cycling the FPGA side power while doing high
speed comms. I did this 500 times without the 7i76 I/O processor ever requiring
a power cycle to recover. I still think this is some other issue
I discovered starting with a .pcb file and saving it as a lihata file then
loading it did not work. During loading of lihata file originally saved from
there was a few long lasting dialogs with among them "clip polygon" or
something similar and eventually after quite many secondes I gave up.
The PWM tachometer signal most probably have really good noise immunity as
timing is robust against noise. Might also have really good accuracy if derived
from a clock with low jitter and slow enough clock drift. However very unlikely
to make any noticeable difference on a fan.
Once asked for
With a 3-wire fan there are two power wires and the third is a tachometer.
Fan speed is controlled by varying the volts (or duty cycle) on the
power wires.
With a 4-wire fan all thee above wires do the same thing but wire #4 is a
speed control signal that is PWM.This saves the need to PWM
On Tuesday 10 December 2019 13:58:30 Peter C. Wallace wrote:
> On Tue, 10 Dec 2019, Gene Heskett wrote:
> > Date: Tue, 10 Dec 2019 13:52:47 -0500
> > From: Gene Heskett
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users]
On Tuesday 10 December 2019 12:19:25 Andy Pugh wrote:
> > On 10 Dec 2019, at 04:45, Gene Heskett wrote:
> >
> > That, or
> > some way to tickle the 7i76D to reset it before I start LinuxCNC the
> > second time because hal can't find spinout
>
> Make a GUI button to toggle sserial-port.0.run on
On Tue, 10 Dec 2019, Gene Heskett wrote:
Date: Tue, 10 Dec 2019 13:52:47 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Need a power signal independent of linuxcnc.
On Tuesday 10 December 2019 11:52:06
On Tuesday 10 December 2019 11:52:06 Peter C. Wallace wrote:
> On Tue, 10 Dec 2019, Gene Heskett wrote:
> > Date: Tue, 10 Dec 2019 11:18:11 -0500
> > From: Gene Heskett
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users]
> On 10 Dec 2019, at 04:45, Gene Heskett wrote:
>
> That, or
> some way to tickle the 7i76D to reset it before I start LinuxCNC the
> second time because hal can't find spinout
Make a GUI button to toggle sserial-port.0.run on and off
___
On Tue, 10 Dec 2019, Gene Heskett wrote:
Date: Tue, 10 Dec 2019 11:18:11 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Need a power signal independent of linuxcnc.
On Tuesday 10 December 2019 10:16:16
On Tuesday 10 December 2019 10:16:16 Peter C. Wallace wrote:
> On Tue, 10 Dec 2019, Gene Heskett wrote:
> > Date: Tue, 10 Dec 2019 06:46:16 -0500
> > From: Gene Heskett
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users]
On Tue, 10 Dec 2019, Gene Heskett wrote:
Date: Tue, 10 Dec 2019 06:46:16 -0500
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Need a power signal independent of linuxcnc.
On Monday 09 December 2019 22:45:26
On Tuesday 10 December 2019 07:23:20 Marcus Bowman wrote:
> Would a half-decent UPS not solve the problem?
> More expensive, for sure, but fine for brown-outs and short cuts.
> I know these were discussed recently, but we used to use them to keep
> computer systems going in broadcast radio
Would a half-decent UPS not solve the problem?
More expensive, for sure, but fine for brown-outs and short cuts.
I know these were discussed recently, but we used to use them to keep computer
systems going in broadcast radio studios where the Buildings department used to
cut the power as part of
Greetings all;
I am running the stretch iso install here on this big house box, but
since the fire destroyed the old Asus board, I now have a new Prime
Z370-A ll, with a 9nth gen 6 core i5 running at 3.7GHz and 32G of ddr4
memory. Much quicker than the old 2.1GHz 4 core phenom. Pretty quick
On Monday 09 December 2019 22:45:26 Gene Heskett wrote:
> Greetings PCW and all;
>
> I find I need a way to do a powerdown reset on the interface box of
> one of my machines. And it needs to be separate from linuxcnc. That,
> or some way to tickle the 7i76D to reset it before I start LinuxCNC
>
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