Hi, this is my first PLC project and I need some help.
The goal is to apply steady force on a random surface and for that I control a piston on the z-axis using two analogue valves, one pushing from above and one from underneath.
Can anybody suggest any strategies? I tried using PID control on the upper valve and a steady pressure on the one underneath but it does not work very well.
Do I need to control both with a PID control? Or two simultaneous PID controllers working together? Any suggestions will be appreciated.
Thank you for your time and excuse my use of English.
The goal is to apply steady force on a random surface and for that I control a piston on the z-axis using two analogue valves, one pushing from above and one from underneath.
Can anybody suggest any strategies? I tried using PID control on the upper valve and a steady pressure on the one underneath but it does not work very well.
Do I need to control both with a PID control? Or two simultaneous PID controllers working together? Any suggestions will be appreciated.
Thank you for your time and excuse my use of English.