File talk:Change with Kp.png

This image is wrong, the red curve should be the one with Kp = 2 and the black curve is the one with Kp=0.5. Why? because, increasing Kp is suppose to increase overshoot too !

There is something else wrong here. Changing the Kp=2 to red and the black curve to Kp=0.5 is OK for overshoot - but the rate of change is higher for 0.5 now than 2.0 - which makes no sense at all. There really is no way to make these curves correct unless they also include damping (as in the green Kp=1 curve). Point is that there is something missing here in the curves, which clearly do not represent just Kp changes as implied.

Hello, is anybody reading this? Can anyone explain this graph? Probably on PID_Controller page.

The problem is, I've read the page, and I do not understand how this graph was built. Title says it's a PV vs time graph, but how was PV calculated from K(t)+P(t)+I(t) value (MV, as I understand it) What is a reference signal and how does it relate to PV, error and MV? Should be great if someone cleared it. Osman-pasha (talk) 15:43, 16 October 2012 (UTC)

Came here to check for this comment. I'm glad it's already there. This graph is wrong. If you lower the proportional coefficient while keeping Ki & Kd constant, the system will respond more slowly. It would make it to the reference AFTER the higher coefficients, but with less overshoot. In this graph it makes it there FASTER and with less overshoot. If that were the case, the ideal Kp would be zero. . . — Preceding unsigned comment added by 108.206.145.2 (talk) 01:40, 9 June 2014 (UTC)