On Mon, Nov 17, 2008 at 10:50:32PM +0800, Howard Chan wrote:
http://myweb.polyu.edu.hk/~icwfchan/P1.png
This graph does not show measured noise in the DAC output. To measure
that you would have to hook a scope or other diagnostic equipment to the
physical DAC output pin on the mesa servo
Jeff Epler wrote:
On Mon, Nov 17, 2008 at 10:50:32PM +0800, Howard Chan wrote:
http://myweb.polyu.edu.hk/~icwfchan/P1.png
This graph does not show measured noise in the DAC output. To measure
that you would have to hook a scope or other diagnostic equipment to the
physical DAC
On Tue, 2008-11-18 at 11:25 -0600, Jon Elson wrote:
Jeff Epler wrote:
On Mon, Nov 17, 2008 at 10:50:32PM +0800, Howard Chan wrote:
http://myweb.polyu.edu.hk/~icwfchan/P1.png
This graph does not show measured noise in the DAC output. To measure
that you would have to hook a
can I reduce the DAC noise
Jeff Epler wrote:
On Mon, Nov 17, 2008 at 10:50:32PM +0800, Howard Chan wrote:
http://myweb.polyu.edu.hk/~icwfchan/P1.png
This graph does not show measured noise in the DAC output. To measure
that you would have to hook a scope or other diagnostic equipment
Kirk Wallace wrote:
I think Howard is using an external controller, which may have its own
PID. Could this be part of the problem?
Too much gain and too many derivatives could certainly be confusing the
issue, if not making tuning impossible.
I have certainly found that VASTLY lower P and
Gentlemen,
I agree with Jon on this. If the servo amp has tuning you cannot
disable then the EMC2 tuning is superimposed on top of the servo amp
tuning. This drastically inhibits the tuning capabilities of EMC2.
thanks
Stuart
On Tue, Nov 18, 2008 at 8:49 PM, Jon Elson [EMAIL PROTECTED] wrote:
Dear All,
I am using 5I20 and 7I33T to control the servo amplifier (SANYO DENKI).
When the turn on the emc, the DAC output generate a noise.
http://myweb.polyu.edu.hk/~icwfchan/P1.png
The noise affects the servo motor which always “shake”. The analog
velocity command of servo amplifier is using
Howard Chan wrote:
I am using 5I20 and 7I33T to control the servo amplifier (SANYO DENKI).
When the turn on the emc, the DAC output generate a noise.
http://myweb.polyu.edu.hk/~icwfchan/P1.png
I think you have a tuning issue.
PID controllers operate on error only, when there is no error the
Sebastian Kuzminsky 提到:
Howard Chan wrote:
I am using 5I20 and 7I33T to control the servo amplifier (SANYO DENKI).
When the turn on the emc, the DAC output generate a noise.
http://myweb.polyu.edu.hk/~icwfchan/P1.png
I think you have a tuning issue.
PID controllers operate on
