Hi Orcinus. Thanks for the suggestions. I'm using Marlin FW.
I searched for the MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND and it's not in the firmware.
The MAX_FEEDRATE_X / MAX_FEEDRATE_Y is not there either. The marlin code defines:
#define DEFAULT_MAX_FEEDRATE {500,500,5,45} I think this is the one I'll need to scale back.
I adjusted the Y servo driver up a notch. It is printing right now. 14 more hours to go. Cross your fingers
I also ordered some heat sinks for the servo driver(s). hopefully they'll help.
The Y motor is not hot. I can't tell if the servo driver is hot or not. I don't want to touch it