[Emc-users] grab focus

[nkp216 .]

How does Axis grab focus in entries gladevcp panels ?
In Gmoccapy cursor is visible.
In Axis he is not !
(the gladevcp panel is the same)

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Re: [Emc-users] Mesa Card Suggestions

[Gene Heskett]

On Saturday 12 October 2019 00:12:11 andrew beck wrote:

> That's a pretty good record!
>
I've been useing it  since the BDI version, which was hell to setup for a 
newbie.  And I've had to reboot 2 or 3 times because of poor hardware, 
and because I like to be on the bleeding edge, have had maybe 3 
instances of that bleeding edge miss-behave that would not have happened 
if I wasn't running code straight from master.  In effect I am playing 
the part of the canary in the coal mine.  An outright crash?  Hasn't 
happened. Lost one machine from a lightning strike on the transformer 
pole across the street.  I think thats a heck of a good record, zero 
problems since I updated the service from 60 to 200 amps AND brought it 
up to code in 2005. I found several places where ID10T so called 
electricians had grandfathered in some poor grounding because this place 
was built before there was an NEC. In that not quite 20 years, I have 
found and reported 3 or 4 problems that were fixed in hours.  These guys 
who write this code are GOOD. You don't converse with the authors of ANY 
other proprietary code, without buying, on a per seat basis, the updated 
code that *might* fix your problem.

Finally, I spent a couple months last winter trying to work with the Mach 
that came with a new machine I bought around this last Christmas and 
found it incapable of doing what I expected, not even capable of telling 
the spindle to do anything more than start-stop, couldn't reverse it or 
vary its speed, giving up on it and the shoddy electrics supplied, and 
replaced everything between the computer and the motors with quality 
stuff from these vendors that live on this list, pico or mesa, or ebay 
and installed linuxcnc.  Now it does everything I've tried, at 2 or 3x 
the speeds that Mach and its off the sidewalk in Honshu electrics could 
muster, and I suspect, far more accurately.

The biggest problem I still have is because its epoxy paint and ceramic 
spindle  motor bearings prevents a truly grounded spindle, the last 
major mod will be to install a brush that touches and grounds the tool, 
and extend that back to a real system ground. Until then I make do with 
alligator clips I have to install when I want to do a tool length 
compensating measurement within the gcode I write. I don't have a 
cad/cam, my brain does that. I'm fond of loops, and have written 90 line 
programs that take 3 days to run. But the end result was the sharpest, 
longest lasting blade I've ever had on my table saw. Lasted 4x longer 
than any $60 blade I've bought. Cutting white ash, oak, maple, cherry or 
walnut for furniture whose Green and Green joints I also cut with the 
g-code I wrote.

I'd hang it up and go fishing if it wasn't for LinuxCNC. Here in WV, 
thats generally a waste of time. I spent a decade (the 60's) in RCSD, 
and the fishing and hunting there kept us from starving.

> On Sat, Oct 12, 2019, 3:24 PM Jon Elson  wrote:
> > On 10/11/2019 02:56 PM, Todd Zuercher wrote:
> > > Thanks Jon,
> > >
> > > >From the sound of if, the powers that be are not going to let me
> >
> > convert this machine to Linuxcnc.  They want to buy a new Wincnc PC.
> >  (The machine operators and myself would rather switch it over.)  Oh
> > well.
> >
> >
> > Well, you can tell them that I've been using
> > EMC/EMC2/LinuxCNC since 1998, and it has not crashed EVER in
> > that whole time.  If that doesn't convince them, then I
> > guess that is what will happen.
> >
> > Jon
> >
> >
> > ___
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
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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 Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Spindle Speed Control.

[Erik Christiansen]

On 05.10.19 15:20, John Dammeyer wrote:
> > 
> > I�m using PWM with a direct signal and enable.My drive accepts 0-10V, 
> > so I
> > created a little board that converts the PWN to a 0-10V analog signal and
> > isolates all the signals.
> > 
> > N. Christopher Perry
> 
> That's basically what I've drawn out too but I found the op-amp
> couldn't pull to ground and I wanted exactly 0V output.  A pull-down
> on the output before the RC and using the ACPL-P480 Andy suggested
> looks interesting since it does have active pull-up and pull-down but
> without a bleed resistor I'm still not sure I can reach 0V.

If you're driving a modest load, then the pull-down should do it. If a
bit more oomph is needed, then an emitter follower on the op-amp output,
with a significantly lower value pull-down is a quick fix. Op-amp
feedback is then from the new output.

Beyond that, you're up for a negative rail for the op-amp so that it can
easily reach 0v.

Erik


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