Any advice on where/what to look for. I put a new valve on axis 0, and upon powering hpu, it did the normal “air in line dance,” then smoothed to what appeared to be normal motion.
Yesterday I was informed that when starting the hpu, axis 0 jumped forward. They shut off hydraulics and restarted. Axis did not jump.
This system is a SLC 5/03 telling a RMC100 where axis needs to be. When hpu is started, we send initialization values to rmc, then tell it to go to the last commanded location. On shutdown, we just issue a halt command to lock the axis in place.
I am at a loss here, as I know next to nothing about motion.