plcengineer
Member
Gents,
I have an application that I am starting. First of all, we have Kinetix 6000 drive communicating to a Controllogix Sercos Motion Card. I am trying to see how to handle a PID or even if that is the right way to do the project... Here is what we have
Basically, we are pushing a metal rod into a welder and monitoring the voltage feedback on the welder. We want to use the voltage feedback to keep a constant air gap.. If a rod starts off and is 12" long, the voltage may be 75V.. As the rod burns and as the servo moves the rod, it may end up 2" at 10V.. So, as you can see, the servo moves the rod into the positive weld lead and tries to maintain the airgap..
Question, I know that I am dealing with position.. It appears that I need to run a PID with the SP being the Voltage Feedback from the welder.. I have reviewed PID and PIDE.. Would I need to use a cascaded loop.. I think I need some help on the best way to control this application..
Thanks,
PLCENGINEER
I have an application that I am starting. First of all, we have Kinetix 6000 drive communicating to a Controllogix Sercos Motion Card. I am trying to see how to handle a PID or even if that is the right way to do the project... Here is what we have
Basically, we are pushing a metal rod into a welder and monitoring the voltage feedback on the welder. We want to use the voltage feedback to keep a constant air gap.. If a rod starts off and is 12" long, the voltage may be 75V.. As the rod burns and as the servo moves the rod, it may end up 2" at 10V.. So, as you can see, the servo moves the rod into the positive weld lead and tries to maintain the airgap..
Question, I know that I am dealing with position.. It appears that I need to run a PID with the SP being the Voltage Feedback from the welder.. I have reviewed PID and PIDE.. Would I need to use a cascaded loop.. I think I need some help on the best way to control this application..
Thanks,
PLCENGINEER