No it’s not getting hot, it’s actually very cool. Two different motors and I get the same results.

I think I could pull the motor off and write a program to cycle the motor with out it alarming out.

This is what happens if it helps
I get a 434 alarm and after checking Diagnosis 722 bit 4 indicates that I have a HCAL alarm on my B axis. If I look at the servo control unit the HCN light is illuminated as well.

If I cycle the power, it will run for another hour....

Just for the fun of it, I popped the top board off of the drive and the three large capacitors look to be pretty swollen, I’m not sure if this means anything, but it didn’t look normal.