On Thu, 2009-08-20 at 21:26 -0400, Gene Heskett wrote:
> On Thursday 20 August 2009, Douglas Pollard wrote:
> >My air compressor started up the same time I was starting my computer
> >and crashed my hard drive. I have a small cheap compressor and its all
> >the motor can do to start it and I guess
Jon Elson wrote:
> Douglas Pollard wrote:
>
>> My air compressor started up the same time I was starting my computer
>> and crashed my hard drive. I have a small cheap compressor and its all
>> the motor can do to start it and I guess it drew the current down.
>> Anyway just something to
Eric H. Johnson wrote:
> Peter,
>
> Thanks. That is basically what I thought. It has been reported to me that,
> in a servo / encoder system, if EMC is shut down, then one or more axes are
> moved and finally EMC is restarted, upon clearing the e-stop a runaway
> condition occurs (at least sometime
Steve Blackmore wrote:
> One reason it's far too slow is the totally unrealistic base period.
> 62500 is way too slow, reading the integrator manual, it probably should
> be much nearer 25000.
>
>
It depends on the computer. If it is just a slow CPU, or has a bad
jitter problem due to some ha
Gene Heskett wrote:
> On Thursday 20 August 2009, Douglas Pollard wrote:
>
>> My air compressor started up the same time I was starting my computer
>> and crashed my hard drive. I have a small cheap compressor and its all
>> the motor can do to start it and I guess it drew the current down.
>>
Douglas Pollard wrote:
> My air compressor started up the same time I was starting my computer
> and crashed my hard drive. I have a small cheap compressor and its all
> the motor can do to start it and I guess it drew the current down.
> Anyway just something to think about!!
On Thursday 20 August 2009, Douglas Pollard wrote:
>My air compressor started up the same time I was starting my computer
>and crashed my hard drive. I have a small cheap compressor and its all
>the motor can do to start it and I guess it drew the current down.
>Anyway just something to think abo
Dear sir,
I would you like to receive list mail batched in a "Daily Digest", such as this
"Emc-users Digest, Vol 40, Issue 21"
And NOT separate mail list.
Thank you very much.
--
Let Crystal Reports handle the re
> My air compressor started up the same time I was starting my computer
> and crashed my hard drive. I have a small cheap compressor and its all
> the motor can do to start it and I guess it drew the current down.
> Anyway just something to think about!!
>
Sebastian (and Chris),
I will try to get some more information over the next few days. If you would
like to see the configuration, I have posted it here:
http://pastebin.com/m2760010c
The servo portion is basically right out of the example. An easy thing to
try might be to disable hal_joystick. A
On Thu, Aug 20, 2009 at 04:29:09PM -0400, Eric H. Johnson wrote:
>
> Thanks. That is basically what I thought. It has been reported to me that,
> in a servo / encoder system, if EMC is shut down, then one or more axes are
> moved and finally EMC is restarted, upon clearing the e-stop a runaway
> c
On Thu, 20 Aug 2009 12:00:45 -0500, you wrote:
>Chris Radek wrote:
>> (I don't recommend any of this. Getting a suitable encoder or
>> suitable hardware to read the existing one is so much better.)
>>
>>
>Yes, a slight fudging of the encoder signals to keep within software
>range might be OK,
Eric H. Johnson wrote:
> Peter,
>
> Thanks. That is basically what I thought. It has been reported to me that,
> in a servo / encoder system, if EMC is shut down, then one or more axes are
> moved and finally EMC is restarted, upon clearing the e-stop a runaway
> condition occurs (at least sometim
My air compressor started up the same time I was starting my computer
and crashed my hard drive. I have a small cheap compressor and its all
the motor can do to start it and I guess it drew the current down.
Anyway just something to think about!!
Peter,
Thanks. That is basically what I thought. It has been reported to me that,
in a servo / encoder system, if EMC is shut down, then one or more axes are
moved and finally EMC is restarted, upon clearing the e-stop a runaway
condition occurs (at least sometimes). I have to get more information
On Thu, 20 Aug 2009, Eric H. Johnson wrote:
> Date: Thu, 20 Aug 2009 14:46:51 -0400
> From: Eric H. Johnson
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "'Enhanced Machine Controller (EMC)'"
> Subject: [Emc-users] Hostmot firmware question
>
> Hi all,
>
> When the firmware for a
Hi all,
When the firmware for any of the hostmot supported Mesa boards is loaded on
running EMC, does it zero the encoder values? IOW, if I run EMC, then shut
it down but leave the computer running, then manually move the axes, when
EMC is restarted, what values will the firmware be holding for th
Peter C. Wallace wrote:
> The three phase PWM generator does have high and low side drive and
> deadzone
> timers but a three phase drive is probably not a good beginner project :-)
>
> You can also count TTL encoder signals directly with the FPGA board.
>
Hm, some good memories come back. My C
> Subject: [Emc-users] Mesa io card driving h bridge and counting encoders
>
> I am building a few machines currently. They are all smaller bench type
> machines at this current time.
>
>
> My main question is, can I drive an h bridge from the mesa. Can I count the
> encoder directly from the b
On Thu, 20 Aug 2009, jon doe wrote:
>
> Yes on this particular machine an extra para port is possible, but I will not
> gain the ability to count the encoders I have as fast or as reliable as I
> would like. Finding how fast the audrino can count would be cool, as that
> would make for a very
Chris Radek wrote:
> (I don't recommend any of this. Getting a suitable encoder or
> suitable hardware to read the existing one is so much better.)
>
>
Yes, a slight fudging of the encoder signals to keep within software
range might be OK, but the extreme case presented by the
OP is so FAR awa
On Thursday 20 August 2009, Stuart Stevenson wrote:
>Ken,
> that is SO true!
>Stuart
>On Thu, Aug 20, 2009 at 11:19 AM, Kenneth Lerman
Amen, +10 etc, and requires even more money and ingenuity to climb. And its
STILL fun.
>wrote:
>> jon doe wrote:
>> >
>> >
>> > I see a long road ahead,
Steve Blackmore wrote:
> On Wed, 19 Aug 2009 22:30:10 -0500, you wrote:
>
>
>> On Wed, Aug 19, 2009 at 10:11:19PM -0500, Jon Elson wrote:
>>
>>
>>> you could put in a one-shot chip to stretch the index pulse
>>>
>> I said it once already but I don't think everyone caught it: on a
>>
On Thursday 20 August 2009, jon doe wrote:
>Yes on this particular machine an extra para port is possible, but I will
> not gain the ability to count the encoders I have as fast or as reliable
> as I would like. Finding how fast the audrino can count would be cool, as
> that would make for a very l
Ken,
that is SO true!
Stuart
On Thu, Aug 20, 2009 at 11:19 AM, Kenneth Lerman
wrote:
>
>
> jon doe wrote:
> >
> >
> > I see a long road ahead, but the journey should be grand, if the
> destination a little anti-climatic.
> >
> >
> >
> > Josh
> >
> When you reach the top of the mountain, y
jon doe wrote:
>
>
> I see a long road ahead, but the journey should be grand, if the destination
> a little anti-climatic.
>
>
>
> Josh
>
When you reach the top of the mountain, you will discover that the
journey isn't over. You'll see a higher mountain just a short distance
away. :-)
K
Yes on this particular machine an extra para port is possible, but I will not
gain the ability to count the encoders I have as fast or as reliable as I would
like. Finding how fast the audrino can count would be cool, as that would make
for a very low cost expansion running off serial port.
Lik
> I said it once already but I don't think everyone caught it:
> on a spindle encoder used for threading and tapping, it
> doesn't matter the slightest bit if you miss the index sometimes.
>
> You certainly must not stretch it longer than one count,
> whatever you do. You would make the cur
Just a quick info on new robot-related work available in emc2 Git master:
1. genserkins - general kinematics for serial manipulators,
these work for manipulators with up to 8 joints, either rotary or
prismatic, and provide forward and inverse kinematics and jacobian functions.
2. An example
On Wed, 2009-08-19 at 21:54 -0700, jon doe wrote:
> I am building a few machines currently.
> I am stuck at limited io ports and I would'nt learn as much.
Hi Jon. Welcome to the project.
You can learn a lot with just a few IO. HAL and ClassicLadder will
allow you to connect those in creative w
On Thu, Aug 20, 2009 at 12:12:24AM -0500, Jon Elson wrote:
> So, fixing the index pulse to reliably sense that, and
> completely forgetting the quadrature counting is the only thing that
> would work. He would then only use the index pulse, once per rev.
I thought we were talking about dividin
You basicly only care about the index before you start the synchronized
movement.
It will sit there, and wait for the index.
If it misses one, it will grab the next one (or at least the one it sees).
Each index will still constrain to the same spindle orientation, so the
thread will not be affect
On Wed, 19 Aug 2009 22:30:10 -0500, you wrote:
>On Wed, Aug 19, 2009 at 10:11:19PM -0500, Jon Elson wrote:
>
>> you could put in a one-shot chip to stretch the index pulse
>
>I said it once already but I don't think everyone caught it: on a
>spindle encoder used for threading and tapping, it does
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