of two is generally easy. A factor of five or ten isn't unusual.
Ken
- Original Message -
From: Jon Elson [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Sent: Monday, April 21, 2008 11:52 PM
Subject: Re: [Emc-users] VFD Interference
At 07:35 AM 4/22/2008, you wrote:
To the best of my knowledge, there has been no attempt to optimize the
performance of the interpreter. If there is strong feeling that this might
be a problem, I suspect that it could be improved significantly.
My general experience with products that have never
Jon Elson wrote:
At the request of a potential customer, I did some performance
tests with EMC2. I created a program with 1 blocks like
N123456 G01 F30 X1. Y0.
with the coordinates working around a 2 diameter circle.
Each chord is roughly 0.0006 long. I ran it with the
I made this program http://pastebin.ca/993663 (same thing I think as Jon
made)
I ran it on the live cd (hardy is all I have handy at the moment) on a
dual core 2.2ghz. (not the greatest latency - around 20us. Anyway..
With the default stepper_inch.ini - acceleration set to 20In/s/s the
Sent: Tuesday, April 22, 2008 9:29 AM
Subject: Re: [Emc-users] VFD Interference
At 07:35 AM 4/22/2008, you wrote:
To the best of my knowledge, there has been no attempt to optimize the
performance of the interpreter. If there is strong feeling that this might
be a problem, I suspect that it could
On Sun, Apr 20, 2008 at 10:42:31PM -0700, Kirk Wallace wrote:
I got the spindle VFD working on my Shizuoka and the speed varies quite
a bit. This seems to be due to interference coming from the spindle
motor leads. The cable has no shielding but there are six wires. One for
each phase, and
through the metal of the
machine as well as the radiated power signals that you are trying to eliminate.
Rayh
--- [EMAIL PROTECTED] wrote:
From: Kirk Wallace [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] VFD Interference
Date: Sun
On Mon, 2008-04-21 at 18:14 +1000, Erik Christiansen wrote:
... snip
You could measure resistance across two phases, and compare with
resistance from one phase to the star point. (A needle poked through the
insulation is an alternative to ruining the neat job, if the pinhole is
insulated
On Mon, 2008-04-21 at 05:52 -0700, [EMAIL PROTECTED] wrote:
Hi Kirk
One needs to be just a bit careful about grounding these sorts of
shielding -- if that is what's going on. I recommend star or single
point grounding where only one end of the shielding is connected to
the frame. If
Erik Christiansen wrote:
On Sun, Apr 20, 2008 at 10:42:31PM -0700, Kirk Wallace wrote:
I got the spindle VFD working on my Shizuoka and the speed varies quite
a bit. This seems to be due to interference coming from the spindle
motor leads. The cable has no shielding but there are six wires. One
Subject: [Emc-users] VFD Interference
Date: Sun, 20 Apr 2008 22:42:31 -0700
I got the spindle VFD working on my Shizuoka and the speed varies quite
a bit. This seems to be due to interference coming from the spindle
motor leads. The cable has no shielding but there are six wires. One for
each phase
On Mon, 21 Apr 2008, Kirk Wallace wrote:
Date: Mon, 21 Apr 2008 08:08:37 -0700
From: Kirk Wallace [EMAIL PROTECTED]
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users
At the request of a potential customer, I did some performance
tests with EMC2. I created a program with 1 blocks like
N123456 G01 F30 X1. Y0.
with the coordinates working around a 2 diameter circle.
Each chord is roughly 0.0006 long. I ran it with the
feedrate at 30 and 60 IPM, no
I got the spindle VFD working on my Shizuoka and the speed varies quite
a bit. This seems to be due to interference coming from the spindle
motor leads. The cable has no shielding but there are six wires. One for
each phase, and three more that seem to connect together at the motor
end, but not to
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