J
I came across a problem in our Frame 9E IGV calibration. During calibration I used the GIAGC to check the LVDT feedback voltages and they were steady and followed through the manual calibration procedure as per the GE guidelines and downloaded IOCFG-rebooted etc. Then I stroked the IGV cross checked from the Autocal screen. Here I noted that I get different LVDT voltages read by RST cores(though DIAGC was stable). This results in different servo currents and ultimately I always get an error between the CSRG and feedback(Allways close to 0.5-0.7 Deg.)
I did this calibration as we experienced problems during starting where the unit trips on IGV trouble. For some reason the IGV actuator gets slower to respond during starting and when we stroke the IGV before starting the problem does not come.
If anyone has experience on above phenomena or has a solution to the above pls post.
Thanks
Jude
I did this calibration as we experienced problems during starting where the unit trips on IGV trouble. For some reason the IGV actuator gets slower to respond during starting and when we stroke the IGV before starting the problem does not come.
If anyone has experience on above phenomena or has a solution to the above pls post.
Thanks
Jude