On 13 January 2012 06:05, Jon Elson el...@pico-systems.com wrote:
I will have to try negative D values to see what they might do.
D might want to be negative or positive, depending on what you are
trying to achieve. You can use it to help catch a fast-moving setpoint
(positive D) or to reject
On 01/12/2012 10:05 PM, Jon Elson wrote:
I was just perusing some of the EMC docs, and wound up on the PID
hal component docs and source. I have never quite understood the
behavior of
the D term.
To (over) simplify:
error = commanded - feedback
errorD = error - previous error
output =
Karl Cunningham wrote:
I assume from your results there is a typo in the feedback -- it should
have been 4.9 this cycle and 4.8 last cycle. So
Terribly sorry, YES, that is what I MEANT to type!
If I'm missing the boat, please let me know.
Maybe I'd better refrain from doing even SIMPLE
On 1/7/2012 7:28 AM, John Thornton wrote:
Hi Kent,
Are you reading the HTML or the PDF? The HTML is easier to convey which
file your reading and that makes it much easier to find and fix any
errors. Thanks for proof reading them.
Thanks
John
Hi, John. Once again I'm in the position for
Gentle persons:
This message covers editorial issues I found reviewing the HTML files on
http://www.linuxcnc.org/docs/2.5/ concerning the (English) HAL manual.
In this email I shall call them parts. I have titled my comments on each
part according to the link title in index.html and given the
