Hello Guys,
I probably found the problem, why you sometimes have to call halcmd as
root to get emc started again. But I don't have a bugfix up to now.
It seems like the complete hal shared memory is not given back to the os
when emc is closed and my shm_tester is still running. For that reason y
I am seing the same thing, after running emc & your shm_tester a
couple of times, ipcs gets some cruft, and I can not start emc again
... shm_tester segfaults
Trying to investigate
/ regards Lars Segerlund
2011/6/18 Michael Abel :
>
> Hello Guys,
>
> I probably found the problem, why
Jon,
I see exactly this in yr pictures: (from the faq on their website)
9. How does angular acceleration affect pulses and error? Angular
acceleration does not cause missing pulses. But it does cause some lag in
position, proportional to acceleration and T^2. (with T= 100, 50, 25, 13 µs
at resoluti
on Elson writes:
>I've already paid for one BeagleBoard and sent it to a developer who
>didn't make much progress
>with it. At least, he still isn't finished.
>
>One problem with the OMAP chip they use in the Beagle is the GPIO is
>only updated every 240 ns, although
>the CPU is about 40 times f
Jan de Kruyf wrote:
> Jon,
> I see exactly this in yr pictures: (from the faq on their website)
>
>
> 9. How does angular acceleration affect pulses and error?
>
> Angular acceleration does not cause missing pulses. But it does cause
> some lag in position, proportional to acceleration and
Jon,
I am very glad that you are doing this, I have wanted to do it
myself for a long time. I have always felt that the CUI encoders,
while being admirably cheap, are not as good as an optical
encoder, but I have had no data to support my belief. Maybe you
are about to come up with some.
In the l
Jon,
the problem is that the delay between reality and the Z domain of the
encoder is variable, so good tuning will be
something somewhere in fairyland unless you lower the bandwidth of your
drive right down so that the delay jitter
becomes insignificant in respect to the bandwidth of your system.
Kim Kirwan wrote:
> Jon,
>
> I am very glad that you are doing this, I have wanted to do it
> myself for a long time. I have always felt that the CUI encoders,
> while being admirably cheap, are not as good as an optical
> encoder, but I have had no data to support my belief. Maybe you
> are about
On Sat, 18 Jun 2011, Jon Elson wrote:
Date: Sat, 18 Jun 2011 13:52:05 -0500
From: Jon Elson
Reply-To: EMC developers
To: EMC developers
Subject: Re: [Emc-developers] CUI encoders
Kim Kirwan wrote:
Jon,
I am very glad that you are doing this, I have wanted to do it
myself for a long time. I
The CUI sensors use the "kit" (frameless) mounting method.
This mounting method lets you save money when your motor
(or something) has a nice shaft sticking out the back, and
a flat place to mount things.
If you're ever looking for a "kit" (frameless) encoder, I have
had good luck with USDigi
Kim Kirwan wrote:
> The CUI sensors use the "kit" (frameless) mounting method.
> This mounting method lets you save money when your motor
> (or something) has a nice shaft sticking out the back, and
> a flat place to mount things.
>
> If you're ever looking for a "kit" (frameless) encoder, I ha
On Sat, 2011-06-18 at 17:14 -0500, Jon Elson wrote:
... snip
> I have a personal bias against US Digital, as their low-cost line of
> encoders have a number of deficiencies.
They work well for me, am I missing something?
http://www.wallacecompany.com/cnc_lathe/HNC/1-1a.jpg
http://www.wallac
Kirk Wallace wrote:
> On Sat, 2011-06-18 at 17:14 -0500, Jon Elson wrote:
> ... snip
>
>> I have a personal bias against US Digital, as their low-cost line of
>> encoders have a number of deficiencies.
>>
>
> They work well for me, am I missing something?
> http://www.wallacecompany.com/c
Any idea when 2.4.7 will be released?
There are quite a few bug fixes.
Users are reporting bugs to me that are fixed just not released.
Thanks
Chris M
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