Better to hear from Mariss himself.
-
It's a give and take kind of situation:
1) For the same peak current, a microstepped motor will have 71% (1/sqrt 2)
the holding torque of a full-step drive. This is because motor
Hi,
I changed genhexkins for my 3 axis platform. It's pretty simple, inverse
kins only, forward to be done. It is compiled and works well on simulator.
But on realtime PC it compiles with lot of errors, and I can't identify the
source.
There's obviuosly some error in genhexkins, whish causes those
2012/5/2 Andrew :
>
> There's obviuosly some error in genhexkins, whish causes those errors in
> other modules (with original genhexkins it compiles OK).
>From the error message I understand that it does not like 2 lines:
line nr. 94 - this line is repeated at least 4 times:
from /home/pkm/linuxcn
2012/5/2 Viesturs Lācis
> >From the error message I understand that it does not like 2 lines:
> line nr. 94 - this line is repeated at least 4 times:
> from /home/pkm/linuxcnc-dev/src/emc/kinematics/genhexkins.c:94:
>
> and also line 95 - mentioned 3 times:
> from /home/pkm/linuxcnc-dev/src/emc/k
On 2 May 2012 13:39, Andrew wrote:
> #include "rtapi.h" /* RTAPI realtime OS API */
> #include "rtapi_app.h" /* RTAPI realtime module decls */
My first thought was that the includes were not being found, but they
clearly are, looking at the errors.
When you get that sort of mess it normally ind
2012/5/2 andy pugh
> Looking in your genhexkins.h file I can't help feeling that:
> #define l 200
> looks like a disaster waiting to happen.
>
> I think that subsititution will be used in any "downstream" file...
Exactly! Thank you, Andy!
I'm generally far from programming, particularly C++. An
http://whatisacnc.com/sprinter a simple install bundle for a windows system.
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2012/5/2 Andrew
> I changed genhexkins for my 3 axis platform. It's pretty simple, inverse
> kins only, forward to be done.
Pity, it won't compile for realtime without forward kinematics. Though it
worked on simulator.
Have to program the forward now...
Andrew
-
"High speed interpolation for micro-line trajectory and adaptive
real-time look-ahead scheme in CNC machining"
http://www.mmrc.iss.ac.cn/~xgao/papernc/2011-scichina-1.pdf
Joachim
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Peter wrote:
>
>
> Jon,
>
> It doesn't "switch" from 1/10 to full-step, it "morphs". It's not done
> with clocks and dividers, its done more in the analog side. That's the
> difference that Mariss adds. Anyone can built a microstepping drive. There
> are scores of application notes and open sour
This is hard to explain without looking at the screen. IF you choose
to machine config in EMC 2.6 you are able to change and test the axis
values while EMC is open. My Y axis is missing the input box to change
the resolution. I would like to find out how to add and remove the
input boxes for t
Peter Homann wrote:
> Better to hear from Mariss himself.
>
>
> Simple drives persist in microstepping anyway above this speed. This means
> they still try to make the motor phase currents sine and cosine past this
> speed. A little problem with that and it's called 'area under the curve'. The
On Wed, 2012-05-02 at 10:19 -0500, Jon Elson wrote:
... snip
> It just seems to me that when the motor inductance causes the winding
> current to lag
> behind the current command from the microstep sine wave, the current control
> logic will automatically become the same as a full-step drive, wi
On 5/1/2012 2:00 PM, craig wrote:
> A number of discussions have addressed software tools to generate G-code
> mostly as part of another discussion..
>
> 1. Some of us are interested in starting from various mechanical CAD
> programs and file formats.
> 2. Some of us are starting from existing grap
Hi all,
I have a tangential tool application with a pneumatically controlled 2
position Z axis. Thus I control the head up / head down, directly with
digital I/O. I also have the head coming up and turning off automatically on
a pause, stop or fault. That is all working fine.
The one thing I have
On 5/2/2012 11:45 AM, Kirk Wallace wrote:
> On Wed, 2012-05-02 at 10:19 -0500, Jon Elson wrote:
> ... snip
>> It just seems to me that when the motor inductance causes the winding
>> current to lag
>> behind the current command from the microstep sine wave, the current control
>> logic will automat
you could try setting motion.feed-hold to true until ready to continue
-m
Am 02.05.2012 um 19:05 schrieb Eric H. Johnson:
> Hi all,
>
> I have a tangential tool application with a pneumatically controlled 2
> position Z axis. Thus I control the head up / head down, directly with
> digital I/O. I
On 4/27/2012 6:59 PM, cogoman wrote:
> for section 2 Getting Started.
>
> I have not yet gotten too far with CAD/CAM to generate gcode, but I
> have a suggestion to run up the flagpole to see if anyone salutes. I
> suggest we select 2 CAD/CAM solutions to include on the CD, with special
> supp
2012/5/2 Eric H. Johnson :
>
> The one thing I have not figured out is how to introduce a delay (i.e.
> timedelay) on resume to give the head sufficient time to lower and turn on
> before motion resumes. I do not see pins on halui or motion for example,
> which would be usable for this function.
>
Hi Kirk,
The answer is below. Mariss, puts a lot into the public domain. That way it's
prior art if anyone tries to patent it.
---
The drive generates a reference voltage proportional to speed. This voltage is
sensed by an offset/gain circuit that becomes linear (fro
Andy P., you said on IRC that it was a long time needed bugfix that took
away the ability to type ahead while doing things in the MDI mode. I hope
you measure "long time" in years because I've been using that feature for
much of a decade.
Having a tool stop at the end of the current MDI comman
Kirk Wallace wrote:
>
>
> I suspect the magic is in the Xilinx chip programming, so we'll probably
> never know what the magic is.
The G201A and some other drives from years ago used CD4000 CMOS chips and
had all this. Those drives could be deciphered fairly easily.
> I'd like to play with a coup
Jon,
IIRC correctly the pre CPLD drives did not have full step morphing. Also the
new drives have a much improved recirculation sequencing. This means that heat
sinking requirements for the drives are greatly reduced.
Also the advantage of the CPLD design is that it makes it harder to reverse
Gene,
please read the mail pertaining to your report which I just posted on
emc-developers.
I strongly oppose 'restoring this feature'. Unless a proper solution is
implemented, this means restoring a bug which is just waiting to get somebody
into real trouble. There is a reason the bugfix is t
On Wednesday, May 02, 2012 10:24:12 PM Michael Haberler did opine:
> Gene,
>
> please read the mail pertaining to your report which I just posted on
> emc-developers.
I am not on the devel list, was 3-4 years back till I got it figured out
that I didn't, and couldn't, speak the level of math yo
On Wed, 2012-05-02 at 20:17 -0500, Jon Elson wrote:
> Kirk Wallace wrote:
> >
> >
> > I suspect the magic is in the Xilinx chip programming, so we'll probably
> > never know what the magic is.
> The G201A and some other drives from years ago used CD4000 CMOS chips and
> had all this. Those drives
Can I Use EMC as stand alone DRO with a set of glass scales and an
Everything IO interface board?
If so, any suggestions on hardware and comfiguration.
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On Wed, 2012-05-02 at 21:35 -0600, Erik Green wrote:
> Can I Use EMC as stand alone DRO with a set of glass scales and an
> Everything IO interface board?
> If so, any suggestions on hardware and comfiguration.
I have a page that has some fairly old information here:
http://www.wallacecompany.com/
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