We have a 2000 Arrow 750, last week we lost one phase on our incoming power. Luckily the mill was at idle, but it took a couple minutes until I figured out what had happened and shut the machine down.
When power was restored I found the PC power supply was fried (literally), so I replaced that with a new AT power supply. Upon boot I received a 44-52 C-Axis encoder fail. I tried power cycling to see if it cleared up - but no.
Pulled the DV5 board, cleaned the contacts, and looked for any fried components. Finding nothing visually wrong with the board I put back in. The 44-52 error was still present upon restart.
Went to the Servo Setup page and looked at each axis, giving them a physical wiggle to confirm the encoders are sending feedback data. No feedback data present for Port-1(C). Tried switching the connections on Port 1(C) and Port 2(X). The X axis scale was showing up under Port-1 in the Servo Setup page with data; but no data for Port-2 which now had the C axis connected and a corresponding alarm for X-axis, but no more C axis alarm.
So this in my mind rules out the DV5 board; but where to go next?