On Mon, 2012-02-20 at 09:18 +0200, Roland Jollivet wrote:
... snip
So now the one half becomes a motion controller, nestled in the guts of the
machine, as it should be, and the other half can be on a boom or at a desk.
I see Kirk was going this way in 2007, but I don't know if he completed it.
On 20 February 2012 06:14, Jon Elson el...@pico-systems.com wrote:
Dropout wrote:
A quick question, does latency matter for servo drives?
Yes, absolutely. But, it is not as critical. For software stepping,
the base
thread is typically around 20 us, and so a jitter of even 5 us is more
2012/2/20 Roland Jollivet roland.jolli...@gmail.com
So the norm is that a stepper system can run off the parallel port, but for
DC servo's, extra hardware is required to sample the encoders.
My question is; if one built a headless system(no video) and disabled
drivers wherever possible,
On 02/19/2012 10:29 AM, Stuart Stevenson wrote:
Gentlemen,
I hope my comments on this subject were not understood as discouraging
the development of the 'language'. I am in favor of any and all exploration
directions.
My thoughts were expressed as an example of the worst case scenario.
On 02/19/2012 12:21 PM, Viesturs Lācis wrote:
Second option sounds more attractive with several notes:
1) It would require additional effort on their free time to maintain
and keep it all running;
Sure, just like it does now. Now we can spread the work around even further.
2) I agree that
2012/2/20 Roland Jollivet roland.jolli...@gmail.com:
My question is; if one built a headless system(no video) and disabled
drivers wherever possible, would such a system be fast enough to run DC
servo's and read the encoders on the parallel port?
As Andrew mentioned, for normal speed with
On 20 February 2012 07:18, Roland Jollivet roland.jolli...@gmail.com wrote:
I'm not qualified to comment here, but;
With the continual difficulty with video drivers and other bits affecting
latency, who not split the the functionality. I don't mean a headless
system, just extending the neck.
In my shop, those fingers all point to me... ;-)
I like it when I am the only one in the shop. It was that way for a couple
years. It is really simple to determine the cause of the problem.
--
Try before you buy =
On 02/20/2012 07:23 AM, Stuart Stevenson wrote:
In my shop, those fingers all point to me... ;-)
I like it when I am the only one in the shop. It was that way for a couple
years. It is really simple to determine the cause of the problem.
Keeps ya from wasting time. ;-)
Mark
Part of linuxcnc's strength lies in its configurability, not just the fact
that it is doing the low level bit banging necessary to run a machine. It
seems that there needs to be functionality built in to allow something down
the line of kmotion? perhaps? I know this doesn't seem like fun to the
On 20 February 2012 12:37, Erik Friesen e...@aercon.net wrote:
It
seems that there needs to be functionality built in to allow something down
the line of kmotion?
Google
Video Surveillance?
Hardcore Dance Music?
Valve Springs?
--
atp
The idea that there is no such thing as objective truth
Sorry, dynomotion http://www.dynomotion.com/
On Mon, Feb 20, 2012 at 8:01 AM, andy pugh bodge...@gmail.com wrote:
On 20 February 2012 12:37, Erik Friesen e...@aercon.net wrote:
It
seems that there needs to be functionality built in to allow something
down
the line of kmotion?
Google
On 20 February 2012 13:07, Erik Friesen e...@aercon.net wrote:
Sorry, dynomotion http://www.dynomotion.com/
That seems to replace all of LinuxCNC except for the UI?
--
atp
The idea that there is no such thing as objective truth is, quite simply, wrong.
Kent et al;
Thanks for the info on this blatantly off topic topic; The correct website is
bookmarked!
JohnS.
--
Try before you buy = See our experts in action!
The most comprehensive online learning library for
2012/2/20 Erik Friesen e...@aercon.net:
It seems that there needs to be functionality built in to allow something down
the line of kmotion? perhaps?
I took a quick look at their homepage and their product descriptions.
Probably I missed something, but what is that additional functionality
that
Roland Jollivet wrote:
I'm not qualified to comment here, but;
With the continual difficulty with video drivers and other bits affecting
latency, who not split the the functionality. I don't mean a headless
system, just extending the neck. A partial mitosis.
Well, this is much less of a
Roland Jollivet wrote:
My question is; if one built a headless system(no video) and disabled
drivers wherever possible, would such a system be fast enough to run DC
servo's and read the encoders on the parallel port?
You have to figure this out for each case. What is the maximum encoder
Greetings all;
I got the next generation of that board done today and populated it.
This slot type opto device is a Honeywell HOA2001, a 5 terminal device
whose basing is marked on top of each tower for the + terminal and an E for
emitter, or an S for the sensor. The led has a 150 ohm current
the simple thing often forgotten with optos is the pull up on the RX side
Dave Caroline
--
Try before you buy = See our experts in action!
The most comprehensive online learning library for Microsoft developers
is just
Gene,
The datasheet says logic high when the slot is clear, logic low when
interrupted. So sounds like you have no LED. FWIW, 0.8V seems REALLY low
for a LED. Typ about 2x that. Esp running @ 25mA. The max reverse led
voltage is listed as only 3V. Was it ever hooked up backwards? Could have
On Mon, 2012-02-20 at 17:42 -0500, gene heskett wrote:
4. All logic outputs with the slots open
are sitting at about 18 millivolts.
The doc says a high output when the optical path is clear, so
something's definitely wrong...
If that were my board, I'd expect the top-surface ground line
On 21 February 2012 00:42, gene heskett ghesk...@wdtv.com wrote:
Greetings all;
I got the next generation of that board done today and populated it.
This slot type opto device is a Honeywell HOA2001, a 5 terminal device
whose basing is marked on top of each tower for the + terminal and an E
On Monday, February 20, 2012 08:55:13 PM Stephen Dubovsky did opine:
Gene,
The datasheet says logic high when the slot is clear, logic low when
interrupted. So sounds like you have no LED. FWIW, 0.8V seems REALLY
low for a LED. Typ about 2x that. Esp running @ 25mA. The max
reverse led
On Monday, February 20, 2012 09:04:16 PM Ed Nisley did opine:
On Mon, 2012-02-20 at 17:42 -0500, gene heskett wrote:
4. All logic outputs with the slots open
are sitting at about 18 millivolts.
The doc says a high output when the optical path is clear, so
something's definitely wrong...
On Monday, February 20, 2012 09:13:46 PM Roland Jollivet did opine:
On 21 February 2012 00:42, gene heskett ghesk...@wdtv.com wrote:
Greetings all;
I got the next generation of that board done today and populated it.
This slot type opto device is a Honeywell HOA2001, a 5 terminal
Honeywell datasheets suck...
The only relatively good picture is the schematic and the view on the left is
from the top and the actual basing they show is from the bottom.
The polarity they show on the top corresponds to the + S for Vcc and + E for
anode/Kathode. At least that is the way I am
On 20.02.12 21:03, gene heskett wrote:
Assuming its hooked backwards, how much normal one diode drop current going
the wrong way does it take to kill a typical LED?
Not much. Limiting the current to the microamps which I'd consider
(possibly) safe make it difficult to detect any output if
On Monday, February 20, 2012 10:53:17 PM mel...@earthlink.net did opine:
Honeywell datasheets suck...
Yeah, I'd compare that vacuum to the one about halfway to Alpha Centari.
The only relatively good picture is the schematic and the view on the
left is from the top and the actual basing they
On Monday, February 20, 2012 11:39:08 PM Erik Christiansen did opine:
On 20.02.12 21:03, gene heskett wrote:
Assuming its hooked backwards, how much normal one diode drop current
going the wrong way does it take to kill a typical LED?
Not much. Limiting the current to the microamps which
Dynomotion cards are oftentimes used with a Mach3 front end.
If you read the Mach3 Forum and email list there always seems to be some
customization of the software/firmware required in order to implement a
complete solution.
From what I have read, Dynomotion usually does the customization.
On 20.02.12 23:46, gene heskett wrote:
On Monday, February 20, 2012 11:39:08 PM Erik Christiansen did opine:
Why isn't practice ever nearly as straightforward as theory? ;-)
That I believe, we can lay right in Murphy's lap. Which ought to be as hot
as Micky D's coffee. Maybe that SOB
On Mon, 2012-02-20 at 23:46 -0500, gene heskett wrote:
... snip
Nope, I had it right, but the wrong resistor,
snip ... someone ...snip
had inadvertently let my hand come back out of the bag holding 150k R's
... snip
I'm glad you got it working.
--
Kirk Wallace
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