fx5u Hydraulic Valve Control, No Feed Back.

[jdcontrolsltd]

I have to control a flow valve, for a hydraulic regulating valve. I have a stepper motor, 1.8* step, regulating valve 0-270* opening.  I m pulsing the stepper motor driver for CW/CCW.  My issue is i set the valve to open from 0 to 50* , 30 on my hmi screen. This requires reducing, so i enter 25, My only means of measurement is counting the pulses immitted from the PLC.  I have the Original 30 input, i now need to move reverse 5 pulses, and this may need increasing /decreasing to find the correct flow of pressure. This is operating a band saw in a foundry, and it limits the lowering of the blade while cutting,

 

 

[seroke]

Hello , can you share your programme ? i hope i will help you.

Dont send all of programme. Just this part. With HMI

[Integrator_99]

Hello jdcontrolsltd,
    Which PLC are you using?

    If your PLC has these instructions, you may want to look at DSZR to home the motor and DDRVI/DDRVA to generate pulses for incremental/absolute moves.