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Submitted by vvv on Fri, 06/22/2012 - 06:48

Hello,

I use DMC4040 and Amplifier(Driver) adjusted in speed mode. I try to tune PID parameters according to app note 5491 (Manual tuning using the velocity zone method)
As described in the app note in item 3, I set the KP and KI term to 0 and set KD to 10. After that the axis move alone without any command given and get position error. If I set KP term different than 0 the axis don't move. Did I miss something? Please help me.

Regards.

Comments 2

Galil_AndyH on 06/22/2012 - 08:27

You probably have a small offset between the amplifier and controller. Set a small KP as you are increasing KD.

LDavis on 08/07/2014 - 06:01

I have a related problem with the velocity zone tuning method. When I initially set KP to 0 and KI both to zero (step 3), I get no movement at all no matter what KD is. If I change KP to, say, 1, then I get the expected oscillating movement from the supplied code. Any suggestions why this is happening?