Prompted by a query on the forums on the age-old question of using
encoders with steppers, I started wondering about wierd and wonderful
ways to make it work.
The issue is that steppers just don't have the right characterstics to
work in a servo loop, as trying to run them harder to recover a
2010/11/29 andy pugh bodge...@gmail.com:
You would probably want a slow-I PID
as a separate component to claw back the missed steps once the
feedrate has slowed enough.
Any thoughts?
If I understand correctly this concept, then in case of major losing
of steps (motor stalled) following error
Unfortunately when a stepper looses synchronisation, one needs to 'stop' the
motor for the poles to realign and then you can move the motor again. I
cannot see how a motor travelling at a velocity near its maximum capable
velocity can loose just a single step with out stopping altogether.
On 29 November 2010 15:20, Belli Button be...@iafrica.com wrote:
Unfortunately when a stepper looses synchronisation, one needs to 'stop' the
motor for the poles to realign and then you can move the motor again. I
cannot see how a motor travelling at a velocity near its maximum capable
Do you mean lacing cable harness? if so
http://www.dairiki.org/hammond/cable-lacing-howto/
Dave Caroline
On Mon, Nov 29, 2010 at 5:05 PM, Kirk Wallace
kwall...@wallacecompany.com wrote:
Does anyone have a link covering the old style of bunch tying wire
coils?
--
Kirk Wallace
or did you mean that wonderful african welder transformer that was
posted recently,
it had a lot of string in it especially the stack of bent E frames in the center
tom3p
On Mon, Nov 29, 2010 at 11:05 AM, Kirk Wallace
kwall...@wallacecompany.com wrote:
Does anyone have a link covering the old
Hello, folks!
I have a question about compiling EMC2.
I have EMC 2.4.3 installed on my PC in a regular way.
I want to implement some changes in Axis GUI, so I got the source of
EMC2 through GIT and did checkout v2.4.3. I have changed the
/home/vie/emc2-dev/src/emc/usr_intf/axis/scripts/axis.py
I think I've read here some weeks ago python is interpreted, not compiled, so
you sould have nothing special to do to see your changes in axis, just quit and
relaunch it.
- Viesturs Lācis viesturs.la...@gmail.com a écrit :
Hello, folks!
I have a question about compiling EMC2.
I have
Jon;
I stumbled into the solution, responses below.
On Sat, Nov 27, 2010 at 12:39 AM, Jon Elson el...@pico-systems.com wrote:
Don Stanley wrote:
Hi Jon and All;
My configuration is:
-D510MO computer
-Ubuntu 10.04 Live Disk
-EMC2 2.4.5
-USC with univstep reconfigured for mill.
On Mon, 2010-11-29 at 17:18 +, Dave Caroline wrote:
Do you mean lacing cable harness? if so
http://www.dairiki.org/hammond/cable-lacing-howto/
Dave Caroline
Thank you. That's what I had in mind. I thought it was more complicated,
but I guess knot.
--
Kirk Wallace
Date: Mon, 29 Nov 2010 15:54:22 +
From: andy pugh bodge...@gmail.com
Subject: Re: [Emc-users] Stepper Musings
To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
On 29 November 2010 15:20, Belli Button be...@iafrica.com wrote:
Unfortunately when a stepper
On Mon, 2010-11-29 at 11:32 -0800, Kirk Wallace wrote:
On Mon, 2010-11-29 at 17:18 +, Dave Caroline wrote:
Do you mean lacing cable harness? if so
http://www.dairiki.org/hammond/cable-lacing-howto/
Dave Caroline
Thank you. That's what I had in mind. I thought it was more
On 29 November 2010 19:32, Kirk Wallace kwall...@wallacecompany.com wrote:
Thank you. That's what I had in mind. I thought it was more complicated,
but I guess knot.
My EMC2 control box:
http://picasaweb.google.com/bodgesoc/Gibbs#5438923441932523602
Looks like I guessed the right knot :-)
--
On Mon, 2010-11-29 at 14:43 -0500, Colin Kingsbury wrote:
... snip
It's not magic and won't make the machine
more precise, but it would make it more fault-tolerant and that seems
significant.
Maybe not tolerant, but it's nice to get a warning when a step or two
are missed and otherwise is not
On 11/29/2010 2:53 PM, andy pugh wrote:
On 29 November 2010 19:32, Kirk Wallacekwall...@wallacecompany.com wrote:
Thank you. That's what I had in mind. I thought it was more complicated,
but I guess knot.
My EMC2 control box:
http://picasaweb.google.com/bodgesoc/Gibbs#5438923441932523602
On 29 November 2010 21:33, Kent A. Reed knbr...@erols.com wrote:
But...what's up with photo 54 of 56? Looks like there's a war story
waiting to be told about that one.
That's what I found when my cooker stopped working.
A 3kW (13A) cooker wired though 1mm2 (7.5A) wire on a dedicated
circuit
On 11/29/2010 4:48 PM, andy pugh wrote:
On 29 November 2010 21:33, Kent A. Reedknbr...@erols.com wrote:
But...what's up with photo 54 of 56? Looks like there's a war story
waiting to be told about that one.
That's what I found when my cooker stopped working.
A 3kW (13A) cooker wired though
First off, while we don't intend for there to be anything secret about
building emc2 packages on Ubuntu 10.04 or 8.04, I still recommend that
users who build their own use run-in-place. This is the easiest way to
build your own version, the fastest to rebuild for small modifications,
and it will
Don Stanley wrote:
When the OUTPUT_SCALE is set to +1.0 I was getting 1 step output for
each inch of travel. That was actually .04 inches of movement for
1 inch movement shown on the axis display. My drives need 125000 steps
per inch of travel (25 steps on the knee). When I set the
Colin Kingsbury wrote:
At first I was not really big on this but the more I think about it, the
more I like it. I play with small, benchtop size machines, where inexpensive
steppers and drives generally work well and cost half or less of what servos
would. A pseudo-servo mechanism that simply
On Mon, Nov 29, 2010 at 3:32 PM, Kirk Wallace
kwall...@wallacecompany.com wrote:
On Mon, 2010-11-29 at 14:43 -0500, Colin Kingsbury wrote:
It's not magic and won't make the machine more precise, but it would make
it
more fault-tolerant and that seems significant.
Maybe not tolerant, but
About changing Axis:
The sources sits in /usr/bin/axis and /usr/share/axis/tcl/axis.tcl with
images in /usr/share/axis/images.
I created a copy called axis_w in /usr/bin and a copy called axis_w.tcl in
/usr/share/axis/tcl and modified both these files, also the images in
../images, ie copied
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