I found a solution to my wandering spindle speed. I ended up changing
out the spindle motor cable to three wires inside metal/vinyl conduit.
That didn't help. Then I started replacing CAT5 control lines with
shielded cable. No good. Finally, I changed, what now seems the most
obvious thing, the ana
ontroller (EMC)"
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 t
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
progr
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 t
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 ne
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)"
Sent: Monday, April 21, 2008 11:52 PM
Subject: Re: [Emc-users] VFD Interference
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, n
Kirk Wallace wrote:
> I miss-typed earlier, the three "extra" wires do not connect at the motor
> end. They are bundled together in the connector box, but do not Ohm out.
> So I have three motor wires U, V, W and three that connect to nothing.
>
It sounds like you have VFD cable. There are thre
On Mon, 2008-04-21 at 10:14 -0500, Jon Elson wrote:
... snip
> I put a power line filter on the INPUT to my VFD, and have no
> shielding or other treatment on the wires between VFD and motor.
> I had some hash on my computer screen before I instaled that filter.
>
> Jon
A VFD input filter is sta
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)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] VFD I
D]>
>To: "Enhanced Machine Controller (EMC)"
>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
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 wir
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.
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 af
ound loops 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)"
Subject: [Emc-users] VFD Interference
Date:
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
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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