Search for Leadshine closed loop stepper on YouTube. Looks like some very
smooth and quiet operation from steppers.
--
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data.
Gene
What I sometimes do is to take a piece of electrical wire and strip the
insulation off. Then I split the insulation along the length and slip it
over the sharp edge. You can glue it with some epoxy or the like.
On 2013/04/11 12:16 AM, Gene Heskett wrote:
On Wednesday 10 April 2013
Use the port connectors which used to come with later AT style and some ATX
motherboards.
Computers shops that have been around for a while should have a bunch of them
if they haven't cleaned out their old stuff. Just be aware that the header
pinouts on those used to be one way, then Intel
That's nice presentation, and exactly what I'm looking for to improve my two
rotary axes with steppers...
Search for Leadshine closed loop stepper on YouTube. Looks like some very
smooth and quiet operation from steppers.
On Thursday 11 April 2013 08:39:43 Marius Liebenberg did opine:
Gene
What I sometimes do is to take a piece of electrical wire and strip the
insulation off. Then I split the insulation along the length and slip it
over the sharp edge. You can glue it with some epoxy or the like.
I've done
Thanks Gene, this has been a very enriching discussion.
No plans still for the Hubles's mirror :).
Cheers,
Javier
On Wed, Apr 10, 2013 at 7:37 PM, Gene Heskett ghesk...@wdtv.com wrote:
On Wednesday 10 April 2013 13:01:29 Javier Ros did opine:
This system
Gene Heskett wrote:
Somebody thinking outside the box, and making perfect sense. The only
fly in the soup is the 10,000 step encoder, and servicing it at 200 rpS to
get that 12,000 rpms
If you run a stepper motor at 12,000 RPM, it will burn up in minutes. You
can spin a typical stepper
On Thu, 11 Apr 2013, Jon Elson wrote:
Date: Thu, 11 Apr 2013 11:32:55 -0500
From: Jon Elson el...@pico-systems.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users]
Gentlemen,
I just put together an e350n with 4GB ram and 120GB SSD. The only bios
play I did was to try to boot with a USB HDD. No joy there so I used a sata
dvd to install.
The all day servo thread latency settles around 9600 (an overnight run
was 12000 in the morning). The all day base
On 4/10/2013 5:01 PM, andy pugh wrote:
On 10 April 2013 21:50, dave dengv...@charter.net wrote:
No panacea anywhere in sight.
Something I saw somewhere on the Internet (possibly a link from mah)
was an article about different approaches.
One very interesting idea was that every move as well
Ah! your timing is impeccable. I just sent some references to Kent with
hope they will get added to the wiki.
Dave
On Thu, 2013-04-11 at 18:56 -0400, Kenneth Lerman wrote:
On 4/10/2013 5:01 PM, andy pugh wrote:
On 10 April 2013 21:50, dave dengv...@charter.net wrote:
No panacea anywhere
On 11 April 2013 23:56, Kenneth Lerman kenneth.ler...@se-ltd.com wrote:
While we are looking at this, we should be sure to consider adding jerk
limits to the system.
I don't think this is rocket science.
But then, neither is rocket science:
http://youtu.be/THNPmhBl-8I
I have tried writing a
On Thu, 2013-04-11 at 18:56 -0400, Kenneth Lerman wrote:
On 4/10/2013 5:01 PM, andy pugh wrote:
On 10 April 2013 21:50, dave dengv...@charter.net wrote:
No panacea anywhere in sight.
Something I saw somewhere on the Internet (possibly a link from mah)
was an article about different
--- On Thu, 4/11/13, andy pugh bodge...@gmail.com wrote:
From: andy pugh bodge...@gmail.com
Subject: Re: [Emc-users] Poor CV
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Thursday, April 11, 2013, 5:42 PM
On 11 April 2013 23:56, Kenneth
Lerman
Of course we landed on the moon silly.right?! LOL
Pete
On Thu, Apr 11, 2013 at 9:33 PM, Gregg Eshelman g_ala...@yahoo.com wrote:
--- On Thu, 4/11/13, andy pugh bodge...@gmail.com wrote:
From: andy pugh bodge...@gmail.com
Subject: Re: [Emc-users] Poor CV
To: Enhanced Machine
I'd like to get the exact dimensions for the triangle pattern used in the wall
and floor panels of Skylab. Looks like there are round holes, possibly
threaded, where the triangle holes meet.
Why that pattern? Because it's an interesting design and looks like it could be
useful for other
just get a picture with something of KNOWN size in it raster it in a vector
program ( photoshop will do this ) import to autocad as dxf, measure known
point to point divide known measurement by measurement made in autocad then
rescale to the quotient . trim all but desired out of dxf . import to
On Thursday 11 April 2013 22:13:10 Jon Elson did opine:
Gene Heskett wrote:
Somebody thinking outside the box, and making perfect sense. The
only fly in the soup is the 10,000 step encoder, and servicing it at
200 rpS to get that 12,000 rpms
If you run a stepper motor at 12,000 RPM, it
This seems to have been recently scanned, found it on Wikipedia. Isogrid hadn't
turned up in my previous searches for this.
Isogrid Design Handbook, NASA CR-124075, McDonnell Douglas, 1973
http://femci.gsfc.nasa.gov/Isogrid/NASA-CR-124075_Isogrid_Design.pdf
And skipping through a tone of
On 4/11/2013 6:56 PM, Kenneth Lerman wrote:
I don't think this is rocket science. (Having worked on the Lunar Module
project, I have a chance of recognizing rocket science.)
Come on, Ken, the rocket-science part is dead easy. When you say F=ma
you've said it all.
Rocket engineering, on the
IT LOOKS TREMENDOUSLY STRONG AND AGREE IT COULD BE USEFUL
On Thu, Apr 11, 2013 at 10:36 PM, Gregg Eshelman g_ala...@yahoo.com wrote:
This seems to have been recently scanned, found it on Wikipedia. Isogrid
hadn't turned up in my previous searches for this.
Isogrid Design Handbook, NASA
On 4/9/2013 12:06 PM, Jon Elson wrote:
--- On Tue, 4/9/13, Viesturs Lācisviesturs.la...@gmail.com wrote:
clip
It has been discussed many times on this list that there is
only one or two
pci-to-parport cards out there that do actually work in EPP
mode. All the
others do so only
I've found an error in one of the dimensions. The radius of the points of the
triangles is given as 0.228 inch but that's impossible with the diameter of the
holes at 0.438.
Fitting a 0.228 radius tangent to the 0.070 thick bars makes it intersect the
holes. Oops! Someone didn't sanity check
Gene Heskett wrote:
And I never considered the iron loses Jon, but you are dead on.
Mariss Freimanis of Gecko describes some torture tests he did years ago
and reported this.
I make affordable servo amps for brushless motors, and
have one on my minimill. You do need to get rotor
On Friday 12 April 2013 00:56:36 Jon Elson did opine:
Gene Heskett wrote:
And I never considered the iron loses Jon, but you are dead on.
Mariss Freimanis of Gecko describes some torture tests he did years ago
and reported this.
Humm, now that you mention that, I read something similar on
Here's the files to download.
http://www.PartsByEMC.com/pub/Skylab-isogrid-panel.jpg
http://www.PartsByEMC.com/pub/Skylab-isogrid-unit.zip
3D Formats included, COB, IGS, DXF, SAT
2D Format DWG
I made one star unit with the arms long enough to overlap. There's a text
file in the ZIP with some
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