As I said, trying to align injected harmonic content to a signal in real-time
with the required accuracy, while the fundamental frequency is rapidly
changing, is not algorithmically possible given existing control schemes. Even
if you could figure out how to fix that, no one has come up with a
I had a 1950's articulated brass desk lamp on top of a PC tower, with a
bookcase at the end of the desk, on which sat an IBM badged HP pen plotter.
While hooking up the serial cable it slipped out of my fingers and touched the
lamp base and the port on the plotter simultaneously.
KAPOW! 120
Hi All,
I have a problem on a machine that is confusing me (not to difficult to
do these days). It is a servo system using mesa 5i23 and 7i33 cards. I
have calibrated the x axis and during testing I find that the x axis
will go from the home position (using G0 x6000) to the correct distance.
On Fri, 03 May 2013 11:10:12 -0500, you wrote:
In a motor designed for reversible use, the brushes also need to be exactly
centered on the poles of the field magnets. I would guess yours are rotated
a bit to compensate for the inductance of the armature windings delaying the
reversal of the
--- On Sat, 5/4/13, Steve Blackmore st...@pilotltd.net wrote:
Ahh that explains it. It's a permanent magnet motor and it
would be easy
to move them or the end case around a bit. It's no big
deal for me -
never use it in reverse anyway. I've a couple of Tapmatic
self reversing tapping heads
On Fri, 3 May 2013 12:29:37 +0100, you wrote:
-Original Message-
From: Stephen Dubovsky [mailto:smdubov...@gmail.com]
I've stayed out of this but...
A 200mpg car exists. VW called it the 1L project
trimmed
So not only possible, but 200mpg is old news.
SMD
To clarify, I was
On Fri, May 3, 2013 at 7:19 PM, Ben Potter b...@bpuk.org wrote:
I clearly hadn't had my morning cuppa when I sat down with that lot -
since
the frontal area is wrong too. 0.79 is closer and gives 77% efficiency
required for a US 200 mpg. The original would be a reasonable for a bus.
Well, not
Sorry, meant to show this pic
On Sat, May 4, 2013 at 7:03 AM, Przemek Klosowski
przemek.klosow...@gmail.com wrote:
On Fri, May 3, 2013 at 7:19 PM, Ben Potter b...@bpuk.org wrote:
I clearly hadn't had my morning cuppa when I sat down with that lot -
since
the frontal area is wrong too.
On 5/4/2013 4:38 AM, Gregg Eshelman wrote:
--- On Sat, 5/4/13, Steve Blackmore st...@pilotltd.net wrote:
Ahh that explains it. It's a permanent magnet motor and it
would be easy
to move them or the end case around a bit. It's no big
deal for me -
never use it in reverse anyway. I've a
On Saturday 04 May 2013 08:05:46 Steve Blackmore did opine:
On Fri, 03 May 2013 11:10:12 -0500, you wrote:
In a motor designed for reversible use, the brushes also need to be
exactly centered on the poles of the field magnets. I would guess
yours are rotated a bit to compensate for the
Issues with the encoder, most likely electrical interference or a grounding
problem. Are the encoder cables shielded, the motor power cables shielded, are
they ran seperately?
- Original Message -
Hi All,
I have a problem on a machine that is confusing me (not to difficult to
do
W/ DQ control most of these problems become FAR simpler problems to deal
with. But at that point you might as well go 'whole hog' and servo an
induction motor. VR motors are attractive becasue they use cheap simple
controls. Once you need a real processor an induction machine does a
better
Hi every one
I have some baldor servos and drives they are the microflex e100 and
are controlled via Ethernet powerlink does anybody know of a driver
for such drive or maybe fancy a challenge with it
I know there has been some work with Ethernet powerlink and linuxcnc
but I only saw io being
On Sat, 4 May 2013, Marius Liebenberg wrote:
Date: Sat, 04 May 2013 09:08:40 +0200
From: Marius Liebenberg mar...@mastercut.co.za
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Creep in X axis
Hi
On 4 May 2013 08:08, Marius Liebenberg mar...@mastercut.co.za wrote:
It has a linear overshoot
across the range but just in one direction.
What version of LinuxCNC are you running?
The reason I ask is that encoder noise is a likely cause, and that this commit:
Todd
They are pre-made cables from Omron. Very good shielding. I have changed
the motor/encoder already and the drive. All the motor and encoder
cables runs together for all the axis (5) and only this one does it. I
have a feeling it must be software related.
On 2013/05/04 02:52 PM, Todd
Andy,
I run 2.5.2 on that machine. As I mentioned before, I did change the
motor/encoder but the problem stays. I thought it might be a damaged
encode because it only effects the feedback in one direction.
Is halscope the only way to see what the cause could be? It might be
difficult to see
On Sat, 4 May 2013, Marius Liebenberg wrote:
Date: Sat, 04 May 2013 09:08:40 +0200
From: Marius Liebenberg mar...@mastercut.co.za
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Creep in X axis
Hi
On 4 May 2013 17:45, Marius Liebenberg mar...@mastercut.co.za wrote:
difficult to see because the error is +/- 1% of the total travel and in
one direction only.
Is the error in measured position or indicated position?
Does either of the commanded position / actual position show the
expected
Hello!
I have 5 pieces of 7i39LV cards and it seems that I have managed to blow
10A fuses on all of them, probably motors are too powerful for the drives.
What kind of trouble am I getting, if I would replace fuses with higher
current rating?
Servo motors are rated at 8A, so both motors
On Sat, 4 May 2013, Viesturs L?cis wrote:
Date: Sat, 4 May 2013 22:16:14 +0300
From: [UTF-8] Viesturs L?cis viesturs.la...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject:
I know very little about Linux and once in a while it ask for permission or
some such thing when I am copying, changing or moving files. Just now I tried
to copy a folder to an SSD and it says it can't because I am not the owner, I
am the owner what the heck it it talking about.
How do I tell
2013/5/4 Bruce Klawiter bmkl...@yahoo.com
I know very little about Linux and once in a while it ask for permission
or some such thing when I am copying, changing or moving files. Just now I
tried to copy a folder to an SSD and it says it can't because I am not the
owner, I am the owner what
2013/5/4 Peter C. Wallace p...@mesanet.com
Both motors should draw 16 A only if they are both at full torque and full
speed simultaneouly. I suspect some of your troubles are due to trying to
run
high speed motors with 1 KHz commutation (for the 7I39 and a few thousand
RPM I would suggest
On Saturday 04 May 2013 16:58:39 Bruce Klawiter did opine:
I know very little about Linux and once in a while it ask for permission
or some such thing when I am copying, changing or moving files. Just
now I tried to copy a folder to an SSD and it says it can't because I
am not the owner, I am
On Sat, 4 May 2013, Viesturs L?cis wrote:
Date: Sat, 4 May 2013 23:27:13 +0300
From: [UTF-8] Viesturs L?cis viesturs.la...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject:
Hi guys;
That motor kit fell off one of those little square USPS vehicles today, so
now I've had an hour or so to play.
1. The brushes are a full 45 degrees from the magnets, so it doesn't run
as well in reverse. Nor does it feel like that hiuge flywheel is moving
much air when running
--- On Sat, 5/4/13, Marius Liebenberg mar...@mastercut.co.za wrote:
From: Marius Liebenberg mar...@mastercut.co.za
I run 2.5.2 on that machine. As I mentioned before, I did
change the
motor/encoder but the problem stays. I thought it might be a
damaged
encode because it only effects the
On 4 May 2013 23:21, Gene Heskett ghesk...@wdtv.com wrote:
=
1. The brushes are a full 45 degrees from the magnets, so it doesn't run
as well in reverse.
3. If reverse so the fan pulley is on the left, and I build a jackshaft
that places the OEM toothed pulley in the same location as the
On Saturday 04 May 2013 20:48:13 andy pugh did opine:
On 4 May 2013 23:21, Gene Heskett ghesk...@wdtv.com wrote:
=
1. The brushes are a full 45 degrees from the magnets, so it doesn't
run as well in reverse.
3. If reverse so the fan pulley is on the left, and I build a
jackshaft
On 5 May 2013 02:25, Gene Heskett ghesk...@wdtv.com wrote:
It seems to me that moving the brushes would be a better solution.
I'll look again tomorrow, but first, it seems the brush holder should sit
in the center of the pole pieces?
For a completely reversible motor, yes. I think you
On Saturday 04 May 2013 22:02:17 andy pugh did opine:
On 5 May 2013 02:25, Gene Heskett ghesk...@wdtv.com wrote:
It seems to me that moving the brushes would be a better solution.
I'll look again tomorrow, but first, it seems the brush holder should
sit in the center of the pole pieces?
I had somewhat the same problem with a closed-loop stepper motor system,
but it was not LCNC. I used a programmable digital counter to count
up-and-down pulses coming from the controller and from the encoders. Turns
out the controller was issuing extra pulses, but again the controller was
not
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