Dear All,
Tried searching for answers on this and found nothing so I
will ask this here, if I execute
an M code e.g. M25 in MDI or Auto, what happens to EMC2? Is the
numerical value of the executed M code available anywhere and is it
possible to hold up program execution until
Chris,
On your website, there is a picture of the mod you did to the sherline
spindle speed control. It looks like you bypass the max-speed trimpot
with an optocoupler.
Are you able to get from lowest to full speed with this mod?
Is this a regular optocoupler?
I understand you drive the
Thanks.
This clarifies a lot. One has to get acquinted with the HAL layer.
Will need to do some more reading I guess.
Kirk Wallace wrote:
I haven't done a thorough study of this yet, I believe you only need to
satisfy these two signals:
...
motion.spindle-index-enable I/O bit
For
Is the problem with software encoding related to the speed of the pulses
coming in? If so, would a low res encoder (homemade) of eg 20 ppr be a
solution?
Does it have to be a quadrature encoder (see in the HAL doc that both A
and B are used) or is there a solution with 2 signals: one index Z and
Geert De Pecker wrote:
Is the problem with software encoding related to the speed of the pulses
coming in? If so, would a low res encoder (homemade) of eg 20 ppr be a
solution?
Yes, but you don't want it to be too coarse. There is some
filtering in the motion of the slaved axis, but if the
Kenneth Lerman wrote:
Jon,
You suggest that the PC would request the registers from the IO board and
the IO board would respond with the requested registers. How much delay,
jitter, latency,... is acceptable?
Darn good question. I know the jitter on when the current
parport interface
Javid Butler wrote:
Jon-
The Silicon Labs chip is not a typical 8051. You are correct about a
standard 8051, but this chip is more of an 8051 core running at 50 or 100
MHz. They may have a version with an Ethernet MAC and DMA as well.
Which ARM7 are you looking at? Atmel has some good
Jon Elson wrote:
Stephen Wille Padnos wrote:
You can't use any old
topology with RTNet. RTNet is a TDMA scheme - each device gets a time
slot in which it may transmit. This eliminates collisions, which are
the main cause of timing jitter on ethernet.
Well, after some more reading of the
For me, the issue of RTnet is irrelevant. I would, instead, just want to use
the Linux driver. If we can get that to generate and receive ethernet frames
in real time, we are in business.
Then we could let the PC be a master and any peripherals be slaves. In the
case of the UPC board, there
For me, the issue of RTnet is irrelevant. I would, instead, just want to
use
the Linux driver. If we can get that to generate and receive ethernet
frames
in real time, we are in business.
Then we could let the PC be a master and any peripherals be slaves. In the
case of the UPC board,
Javid Butler wrote:
For me, the issue of RTnet is irrelevant. I would, instead, just want to
use
the Linux driver. If we can get that to generate and receive ethernet
frames
in real time, we are in business.
Then we could let the PC be a master and any peripherals be slaves. In the
case of the
If you do use the ferrites in the outputs let us know how much heat they
produce. I would guess it will be a function of the quality of the VFD's
output stage, but have never tried power ferrites.
The filters used in theatrical dimmers can get pretty hot, and those
frequencies are low compared
Javid Butler wrote:
If you do use the ferrites in the outputs let us know how much heat they
produce. I would guess it will be a function of the quality of the VFD's
output stage, but have never tried power ferrites.
The filters used in theatrical dimmers can get pretty hot, and those
Could you provide an example of a servo motor with feedback?
I will try, but all my machines are stepper driven, so while I think I
understand the concept of a servo drive I've never tuned one or worked with
it directly. Feel free to correct any misunderstandings. I'm using arbitrary
Hi! For various reasons I have chosen to build my own kernel and compile
EMC2. I'm nearly there but stumbling at the last stage.
I have patched a vanilla 2.6.22 kernel with RTAI. My PC boot and runs
normally and I can execute all the RTAI scripts in the testsuite. I am
using Ubuntu 7.10.
I
Hi,
I am using kernel 2.6.22, RTAI 3.6-test1 and EMC 2.1.7 or the CVS HEAD.
During the EMC2 configuration phase it checks for Adeos, and it isn't
found. However the configuration script says that it was successful and
the application can be built.
Do I need to patch the kernel with Adeos? If so
Kenneth Lerman wrote:
For me, the issue of RTnet is irrelevant. I would, instead, just want to use
the Linux driver. If we can get that to generate and receive ethernet frames
in real time, we are in business.
Well, that's the problem, it is NOT real time code. I don't
know how far it is
Kirk Wallace wrote:
Jon gets a gold star. I believe his is line filter suggestion solved my
noisy spindle encoder index problem. I got a couple of PREO filters:
http://www.eastek-intl.com/images/PreoSeriesER.pdf
One for the spindle VFD input (30 A) and another for the coolant VFD
input
Jon Elson wrote:
Kenneth Lerman wrote:
For me, the issue of RTnet is irrelevant. I would, instead, just want to use
the Linux driver. If we can get that to generate and receive ethernet frames
in real time, we are in business.
Well, that's the problem, it is NOT real time code. I don't
Stephen Wille Padnos wrote:
Jon Elson wrote:
Kenneth Lerman wrote:
For me, the issue of RTnet is irrelevant. I would, instead, just want to use
the Linux driver. If we can get that to generate and receive ethernet frames
in real time, we are in business.
Well,
Update - I can get EMC2 CVS HEAD to start up with no errors if I start
it as root. Otherwise it fails at the insmod stage. I guess regular
users don't have permission to do this.
So how do I solve this problem?
thanks for the help! Andy
Original Message
Subject: Problems
I am wondering if these motors, if scaled up could work as servo motors.
http://www.torcman.de/peterslrk/LRK350-20-15_eng.html
http://www.torcman.de/peterslrk/index_eng.html
http://groups.yahoo.com/group/lrk-torquemax/
Being able to build my own servo motors is very appealing.
--
Kirk Wallace
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